# RIVERDALE DIURON 80 WP WEED KILLER

- EPA Reg No: **228-273**
- Registrant: NUFARM AMERICAS, INC.
- Signal word: Caution
- Active ingredients: Diuron (80%)
- Label accepted: 2005-01-13
- Source PDF: https://www3.epa.gov/pesticides/chem_search/ppls/000228-00273-20050113.pdf

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;)73 'f~ 111 3 
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY 
WASHINGTON, D.C. 20460 
3iTN 
liB. 13 200S 
Mr. Theodore D. Head 
Nufarm Americas, Inc. 
1333 Burr Ridge Parkway, Suite 125A 
Burr Ridge, IL 60527 
Dear Mr. Head: 
OFFICE OF 
PREVENTION, PESTICIDES 
AND TOXIC SUBSTANCES 
Subject: Riverdale Diuron 80 WP Weed Killer (Revise Label) 
EP A Registration No. 228-273 
Application Dated October 26, 2004 
The labeling referred to above, submitted in connection with registration under the 
Federal Insecticide, Fungicide, and Rodenticide Act, as amended is acceptable provided you 
make the following changes before you release the product for shipment. 
1. On page 3, the last paragraph, delete the phrase "other similar areas" from the second sentence. 
2. On page 5, under General Weed Control, delete the sentence "For weed control on small 
areas, use one-half cupful of Diuron 80WP per 100 sq ft for a dosage of approximately 50 lb. per 
acre." Alternatively, revise the sentence so that the rate does not exceed 15 pounds per acre. 
3. On page 12, under Storage and Disposal, revise "Storage" to read "Pesticide Storage". 
Submit two (2) copies of your final printed label incorporating the above changes before 
you release the product for shipment. Amended labeling supercedes all previously accepted ones. 
A stamped copy of labeling is enclosed for your records. 
Sincerely, 
U~ IC LU ,c.'-Et", <r' 
James A. Tompkins 
Product Manage 25 
Herbicide Branch 
Registration Division (7505C)

® 
RIVERDALE 
DIURON 80WP 
WEED KILLER 
ACTIVE INGREDIENT, 
Diuron [3-(3,4-Dichlorophenyl)-1,1-Dimethylurea] 
INERT INGREDIENTS, . . . . . . . . . . 
TOTAL 
Riverdale is a Registered Trademark of Nufarm Americas Inc. 
KEEP OUT OF REACH OF CHILDREN 
CAUTION - CAUCION 
Si us ted no entiende 1a etiqueta, busque a alguien para que 
se 1a explique a usted en detalle. 
(If you do not understand the label, find someone 
to explain it to you in detail.) 
SEE BELOW FOR FIRST AID 
AND ADDITIONAL PRECAUTIONARY STATEMENTS 
NET WEIGHT: 50 LBS. 
/3 
80.0% 
20.0% 
100.0% 
EPA REG. NO. 228-273 EPA EST. NO. 228-IL-l 
MANUFACTURED BY NUFARM AMERICAS INC., BURR RIDGE, ILLINOIS 60527-0866 
NOTE: Spanish language is optional 
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Revised 6/29/04 Changed First Aid Statement per PR 2001-1. 
Revised 10/25/04 Changed in accordance with EPA letter dated 9-22-04

3 
Riverdale Diuron BOWP Weed Killer 
? 13 
Page 2 
(Side Panels) 
PRECAUTIONARY STATEMENTS 
HAZARDS TO HUMANS AND DOMESTIC ANIMALS 
CAUTION - CAUCION 
Causes eye and skin irritation. Do not get in eyes, on skin, or on clothing. 
Harmful if swallowed. Avoid breathing spray mist and contamination of food and feed. 
NON-WPS TURF USES: Applicators and other handlers who handle this pesticide for any 
use NOT covered by the Worker Protection Standard (40 CFR Part 170)--in general, only 
agricultural plant uses are covered by the WPS -- must wear: Personal protective 
equipment beyond normal work attire is not required. 
WPS USES: Personal Protection Equipment: Some of the materials that are chemical­
resistant to this product are listed below. If you want more options. follow the 
instructions for category A on an EPA chemical-resistance category selection chart. 
Applicators and other handlers who handle this pesticide for any use covered by the 
Worker Protection Standard (40 CFR Part 170) -- in general, agricultural plant uses 
are covered -- must wear: long-sleeved shirt and long pants, chemical-resistant 
gloves made of any waterproof material such as polyethylene or polyvinyl chloride, 
and shoes plus socks. Follow manufacturer's instructions for cleaning/maintaining 
Personal Protective Equipment (PPE). If no such instructions for washables, use 
detergent and hot water. Keep and wash PFE separately from other laundry. 
Engineering Control Statements: When handlers use closed systems, enclosed cabs, or 
aircraft in a manner that meet the requirements listed in the Worker Protection 
Standard (WPS) for agricultural pesticides [40 CFR 170.240(d) (4-6)J, the handler PPE 
requirements may be reduced or modified as specified in the WPS. 
USER SAFETY RECOMMENDATIONS 
USERS SHOULD: Wash hands before eating, drinking, chewing gum, using tobacco or 
using the toilet. Remove clothing immediately if pesticide gets inside. Then 
wash thoroughly and put on clean clothing. 
FIRST AID STATEMENT 
Have the product container or label with you when calling a poison control center or 
doctor, or going for treatment. 
IF IN EYES: Hold eye open and rinse slowly and gently with water for 15 to 20 
minutes. Remove contact lenses, if present t after the first 5 minutest 
then continue rinsing eye. Call a poison control center or doctor for 
treatment advice. 
IF SWALLOWED: Call a poison control center or doctor immediately for treatment 
advice. Have person sip a glass of water if able to swallow. Do not 
induce vomiting unless told to do so by a poison control center or 
doctor. Do not give anything by mouth to an unconscious person. 
IF ON SKIN Take off contaminated clothing. 
OR CLOTHING: of water for 15 to 20 minutes. 
for treatment advice. 
Rinse skin immediately with plenty 
Call a poison control center or doctor 
ENVIRONMENTAL HAZARDS 
Do not apply directly to water, or to areas where surface water is present or to 
intertidal areas below the mean high water mark. Do not contaminate water, when 
disposing of equipment washwater or rinsate.

Riverdale Diuron BOWP Weed Killer 
'1"- /3 
Page 3 
DIRECTIONS FOR USE 
It is a violation of Federal law to use this product in a manner inconsistent with its 
labeling. READ ENTIRE LABEL BEFORE USING THIS PRODUCT. USE STRICTLY IN ACCORDANCE WITH 
LABEL PRECAUTIONARY STATEMENTS AND DIRECTIONS. 
Do not apply this product in a way that will contact workers or other persons, either 
directly or through drift. Only protected handlers may Qe in the area during application. 
For any requirements specific to your State or Tribe, consult the agency responsible for 
pesticide regulation. 
AGRICULTURAL USE REQUIREMENTS 
Use this product only in accordance with its labeling and with the Worker Protection 
Standard, 40 CFR part 170. This Standard contains requirements for the protection of 
agricultural workers on farms, forests, nurseries, and greenhouses, and handlers of 
agricultural pesticides. It contains requirements for training, decontamination, 
notification, and emergency assistance. It also contains specific instructions and 
exceptions pertaining to the statements on this -label about personal protective 
equipment (PPE) and restricted-entry interval. The requirements in this box only 
apply to uses of this product that are covered by the Worker Protection Standard. 
Do not enter or allow worker entry into treated areas during the restricted-entry 
interval (REI) of 12 hours. 
PPE required for early entry to treated areas that is permitted under the Worker 
Protection Standard and that involves contact with anything that has been treated, 
such as plants, soil, or water, is: coveralls, chemical-resistant gloves made of any 
waterproof material, and shoes plus socks. 
NON-AGRICULTURAL USE REQUIREMENTS 
The requirements in this box apply to uses of this product that are NOT within the 
scope of the Worker Protection Standard for Agricultural pesticides (40 CFR part 
170). The WPS applies when this product is used to produce agricultural plants on 
farms, forests, nurseries, or greenhouses. No re enery restrictions fOI nOli ClOp 
applications. Keep unprotected persons out of treated areas until sprays have dried. 
IMPORTANT: Injury to or loss of desirable trees or other plants may result from failure 
to observe the following: 
Do not apply (except as recommended for crop use), or drain or flush equipment on or near 
desirable trees or other plants, or on areas where their roots may extend, or in locations 
where the chemical may be washed or moved into contact with their roots. Do not use on 
home plantings of trees, shrubs or herbaceous plants, nor on lawns, walks, driveways, 
tennis courts, or similal alcas. Prevent drift of dry powder or spray to desirable 
plants. Do not contaminate any body of water. Keep from contact with fertilizers, 
insecticides, fungicides, and seeds. 
Thoroughly clean all traces of Diuron BOWP from application equipment immediately after 
use. Flush tank pump, hoses, and boom with several changes of water after removing nozzle 
tips and screens (clean these parts separately). 
IMPORTANT: Injury to or loss of desirable trees or other plants may result from failure 
to observe the following: Do not apply (except as recommended for crop use), or drain or 
flush equipment on or near desirable trees or other plants, or on areas where their roots 
may extend, or in locations where the chemical may be washed or moved into contact with 
their roots. Do not use on lawns, walks, driveways, tennis courts, or similar areas. 
Prevent drift of dry powder or spray to desirable plants. Do not contaminate domestic 
waters. Keep from contact with fertilizers, insecticides, fungicides, and seeds. 
Thoroughly clean all traces of Diuron BOWP from application equipment immediately after 
use. Flush tank, pump, hoses, and boom with several changes of water after removing

Riverdale Diuron BOWP Weed Killer 
nozzle tips and screens (clean these parts separately). 
NON-CROP WEED CONTROL 
Around Farm Buildings, Storage Areas, 
Industrial Plant Sites, Petroleum Tank Far.ms, 
Utility Highway Pipeline, Lumber Yards, 
Irrigation and Drainage Ditches. 
GENERAL INFORMATION 
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Page 4 
Diuron BOWP Weed Killer is a wettable powder to be mixed in water and applied as a spray 
for control of weeds. It is non-corrosive to equipment I non-flammable and non-volatile. 
Diuron BOWP may be applied to the soil prior to emergence of weeds to control susceptible 
weed seedlings for an extended period depending on dosage rate used. Results vary with 
soil type. Heavy soils (high in organic matter) to obtain equivalent herbicidal 
performance. Best results occur if rainfall (or irrigation) occurs within two weeks of 
application. 
Diuron BOWP also may be used to control emerged seedling annual weeds by including a 
.urfactant in the spray mixture. Best results are obtained on succulent weeds growing 
under high humidity and temperatures of 70°F or higher. 
Since the effect of Diuron BOWP varies with soils I uniformity of application and 
environmental conditions, it is suggested that growers limit their first use to small 
areas; this is especially important where the operator is not completely familiar with 
requirements for precise application l since over dosage can result in injury to crops. 
USE PRECAUTIONS 
Injury to or loss of desirable trees or other plants may result from failure to observe 
the following, 
Do not apply (except as recommended for crop use), or drain or flush equipment on or near 
desirable trees or other plants l or on areas where their roots may extend, or in locations 
where the chemical may be washed or moved into contact with their roots. Do not use on 
lawns, walks, driveways, tennis courts, or similar areas. Prevent drift of dry powder or 
spray to desirable plants. Do not contaminate domestic water. Keep from contact with 
fertilizer, insecticides, fungicides and seeds. Thoroughly clean all traces of Diuron 
80WP from application equipment immediately after use. Flush tank, pump I hoses and boom 
with several changes of water after removing nozzle tips and screens (clean these parts 
separately) . 
Before spraying, calibrate equipment to determine quantity of water necessary to uniformly 
cover area to be treated. Weigh proper amount of Diuron BOWP and mix into necessary 
volume of water. Material must be kept in suspension at all times by continuous 
agitation. Except for small areas, use fixed boom power sprayers properly calibrated to 
insure a constant rate of application. Openings in screens should be equal to or larger 
than 50 mesh. Agitate by mechanical or hydraulic means in the spray tank. If by-pass or 
return line is used l it should terminate at bottom of tank to minimize foam. Do not use 
air agitation. When a range of dosage rates is listed l use the lower rates on lighter 
soils (sandy loams, loams, and soil low in organic matter), and the higher rates on 
heavier soils (clay loams l clays, and soils high in organic matter) . 
NON-CROP WEED CONTROL 
Diuron BOWP is an effective herbicide for the control of many annual and perennial grasses 
and herbaceous weeds on non-cropland areas where bare ground is desired. The degree of 
control and duration of effect will vary with the amount of chemical applied, soil type, 
rainfall and other conditions. 
Diuron BOWP may be used as 
ground is frozen, provided 
to activate the herbicide. 
shortly before weed growth 
ground. 
a pre-emergence treatment at any time of the year except when 
adequate moisture is supplied by rainfall or artificial means 
Best results are obtained if application is made to the soil 
begins. If dense growth is present I remove tops and spray the 
on established weeds may be obtained by the addition of a Increase contact activity 
surfactant at the rate of 
spray to actively growing 
70'P. 
2 qts. per 100 gals. of spray mixture. Apply as a drenching 
weeds during warm weather when daily temperature will exceed

Riverdale Diuron BOWP Weed Killer 
GENERAL WEED CONTROL: To control most weeds for an extended period of time on non­
cropland such as utility, highway, pipeline and railroad rights-of-way, petroleum tank 
farms, lumberyards, storage areas, industrial plant sites, and around farm buildings -
apply 5 to 15 ze lbs. of Diuron 80WP per acre to control most annual weeds. Use 12 ZB-to 
~lbs. per acre for perennial weeds; additional treatment may be required to where a 
longer period of control is desired or when hard-to-kill, deep-rooted perennial weeds such 
as Johnsongrass are present. In low rainfall areas, Diuron 80WP may not provide 
satisfactory control of deep rooted perennial weeds. 
For weed control on small areas, use one-half cupful of Diuron BOWP per 100 sq. ft. for a 
dosage of approximately SO lbs. per acre. 
IRRIGATION AND DRAINAGE DITCHES. Apply 15 5 Lo 28 lbs. per acre to control most annual 
weeds., use 28 to 68 Ibs. per acre to control both anliual and perennial weeds. For 
irrigation ditches and during the non-crop season, and when ditch is not in use. To 
minimize movement of Diuron 80WP with irrigation water (to avoid possible crop injury), it 
is essential that the herbicide be fixed in the soil by moisture. Apply before expected 
seasonal rainfall (if possible when soil in the ditch is still moist). Following 
treatment, if rainfall has not totaled at least 4 inches, fill ditch with water and allow 
the water to stand for 72 hours; then drain off the water before using ditch. Do not 
treat any ditch into which roots of trees or other desirable plants may extend as injury 
may result. 
SELECTIVE USE IN CROPS 
WEEDS CONTROLLED: Diuron 80WP as a pre-emergence treatment selectively controls 
germinating seedling weeds in certain crops. Rates of 3/4 to 1 lb. per acre control some 
annuals including crabgrass, barnyardgrass, pigweed, purslane, lambsquarters and ragweed. 
At 1-1/2 to 2 Ibs. per acre, seedling weeds such as bluegrass (Poa annua), annual sweet 
vernal grass, foxtail, rattail fescue, red sprangletop, velvetgrass, chickweed, corn 
spurry dog fennel, Amsinckia (fiddleneck), gromwell, groundsel, knawel, shepherdspurse, 
tansymustard, wild lettuce, wild mustard, annual ground cherry and annual morningglory are 
controlled. In addition, 2 to 6 lbs. per acre control weeds such as annual lovegrass, 
annual ryegrass, sandbur, ricegrass, orchardgrass, seedling Johnsongrass, annual 
smartweed, annual sowthistle, buttonweed, corn speedwell, horseweed kochia, kyllinga, 
Mexican clover, hawksbeard, peppergrass, pineappleweed, pokeweed, rabbit tobacco, 
ageratum, Spanishneedles and wild radish. 
Partial control of quackgrass and horsenettle usually occurs with 4 lbs. per acre; partial 
control of maidencane, pangolagrass and guineagrass usually occurs with treatments of B to 
10 lbs. per acre. 
Results vary with soil types (the lower rates are effective on the lighter soils and 
higher rates on heavier soils) and environmental conditions. sufficient moisture in the 
form of rainfall or irrigation is necessary after treatment to carry the chemical into the 
root zone of germinating weeds. Any well established weed should first be eliminated by 
mechanical or other means. For best results, the soil should be well prepared and as free 
as possible from trash and clods. Unless otherwise directed, surface of the soil should 
not be cultivated or disturbed after application of Diuron as efficiency may be reduced. 
Diuron 80WP plus a surfactant is an effective treatment of emerged seedling weeds for use 
as a directed post emergence spray in certain crops. Rates as low as 1/4 lb. Diuron 80WP 
per acre plus a surfactant control seedling pigweed. Rates of ~ lb. per acre control 
seedling weeds such as crabgrass, goosegrass, barnyardgrass (watergrass), crowfoot, 
pigweed, purslane and annual morningglory. Best results are obtained under conditions of 
high humidity and temperatures over 70°F. 
SOIL LIMITATIONS: Crop injury may result from failure to observe the following: 
Unless otherwise directed, do not use (I) on light (sand, loamy sand or gravelly) soils 
(2) on alfalfa, apples, barley, citrus, cotton (pre-plant and lay-by), grapes, olives, 
pears, plumosus fern, sorghum, sugar cane and winter wheat where organic matter is less 
than 1% (3) on blueberries, birds foot trefoil, caneberries, gladiolus and gooseberries 
where organic matter is less than 2%. 
Unless otherwise directed, do not replant treated areas to any crops within two years 
after last application as injury to subsequent crops may result. 
CROPS 
ALL RATES ARE EXPRESSED AS BROADCAST RATES: Where band applicators are specified, use 
proportionately less. For example, use 1/3 of the broadcast rate when treating 14" band 
where row spacing is 42". Unless otherwise directed, surface of soil should not be 
cultivated or disturbed after application as crop injury may result. 
ALFALFA: Use in areas where alfalfa becomes Winter dormant and in areas of California 
(North of the Tehachapi Mountains) where alfalfa becomes semi-dormant. Use 1-1/2 to 3

Riverdale Diuron BOWP Weed Killer 7 'I /3 
Page 6 
lbs. per acre (except east of the Appalachian Mountains, use 1-1/2 to 2 lbs.) Apply 
anytime after alfalfa is dormant in the Fall but before crop begins growth in the Spring. 
For control of volunteer alfalfa seedlings in the Far West, use 4 lbs. per acre (see Soil 
Limi tations . ) 
Treat only stands established for one year or more. Do not apply to seedling alfalfa nor 
to alfalfa grass mixtures, do not apply to established alfalfa with unusually shallow root 
penetration (such as shallow hard pans, in alkali spots) as crop injury may result. 
PACIFIC NORTHWEST: Apply in the Fall after alfalfa becomes dormant but no later than mid­
December. 
ARIZONA, CALIFORNIA, AND NEVADA: Application may be made on dormant alfalfa as late as 
January. 
EASTERN COLORADO AND KANSAS: For control of tansymustard, apply 1 lb. shortly after 
emergence of mustard in the FaIlor Winter and 2 lbs. if weeds are 2 to 4 inches tall. If 
other annual weeds are present, use 2 to 3 lbs. in February or March. 
OTHER AREAS: Where alfalfa becomes Winter dormant, apply in March or early April before 
Spring growth begins. 
APPLES AND PEARS: Use only under trees established in the orchard for at least 1 year. 
Apply 4 lbs. per acre to area under individual trees or as a band in the tree rowi avoid 
contact of foliage or fruit (see soil Limitations). Apply in the Spring (March through 
May). Do not treat dwarf varieties. 
FAR WEST: Treatment may be made in Winter (December through February) or apply 2 Ibs. as 
postharvest treatment followed by 2 lbs. in the Spring. 
ASPARAGUS: Do not apply to newly seeded asparagus nor to young plants with exposed roots 
as severe injury may result. Apply as a band of broadcast treatment. On light sandy 
soils and other soils low in clay or organic matter, apply 1 to 2 lbs. per acre. Two 
applications may be used: the first application should be made before weeds become 
established but no earlier than 4 weeks before spear emergence and no later than the early 
cutting period (if weeds are controlled into the cutting period by cultural practices, 
application may be delayed until immediately after the last cultivation) a second 
application may be made immediately following completion of harvest provided rainfall is 
expected. When two applications are used in one season, do not exceed 3 lbs. per acre per 
application. In Washington (irrigated crop), apply only a single treatment of 4 lbs. per 
acre in late November or December. 
BARLEY (Winter) WESTERN OREGON AND WESTERN WASHINGTON: Apply a single treatment of 1-1/2 
to 2 lbs. per acre as soon as possible after planting but before emergence of barley. Do 
not apply to cloddy or compacted ground where seed is exposed or improperly planted. 
Treated area should not be replanted to any rotational crop within 1 year after last 
application as injury to the subsequent crop may result. Do not treat barley planted less 
than 1" deep. 
BIRDSFOOT TREFOIL (Lotus) WESTERN OREGON: Treat only established stands at least 1 year 
old. Apply a single treatment of 2 lbs. per acre when trefoil is dormant (October 15 to 
December 15, see Soil Limitations) Do not apply to seedling trefoil as injury may 
result. Do not replant treated areas to any crop within 1 year after application as crop 
injury may result. 
BLUEBERRIES, CANEBERRIES AND GOOSEBERRIES: Apply only to fields which have been 
established for at least 1 year. Do not apply to berries interplanted with fruit trees, 
do not apply to plants whose roots are exposed as injury may result. Spray only ground at 
base of bushes. Avoid spraying foliage as injury may result. 
CALIFORNIA - Raspberries, Blackberries, Boysenberries, Dewberries, and Loganberries: For 
control of Winter annual weeds, apply 2 lbs. per acre as a band application at base of 
canes or bushes in October or November. A second treatment at the same rate in late 
Spring controls Summer annuals. A single application of 3 lbs. per acre in January or 
February will control both Winter and Summer annuals in some areas but the separate Fall 
and Spring schedule is preferred. 
WESTERN WASHINGTON AND WESTERN OREGON - Blueberries, Caneberries, and Gooseberries: Same 
schedule as recommended in California. 
INDIANA, MICHIGAN AND OHIO - Blueberries, Make a band application of 2 to 4 lbs. per acre 
in late Spring but before germination and growth of annual weeds. As an alternative, 
apply 2 lbs. per acre in the Fall and repeat at the same rate in the Spring. 
INDIANA, MICHIGAN AND OHIO - Raspberries: Make a single application as a band treatment 
at a rate of 3 lbs. per acre in the Spring before germination and growth of annual weeds. 
MASSACHUSETTS - Blueberries: For control of Summer annuals, make a single application as 
a band treatment at a rate of 2 lbs. per acre in late Spring, but before germination and 
growth of weeds. 
NEW JERSEY - Blueberries: For control of Winter annual weeds, apply 2 lbs. per acre as a 
band treatment in October, November or December. 
CITRUS: Use only under trees established in the grove for at least one year. Apply as a 
directed spray avoiding contact of foliage and fruit with spray or drift. Time 
application as indicated for specific areas except application may be initiated any time 
of the year where sprinkler or flood irrigations can be timed to activate the herbicide. 
Established perennial weeds require other special control procedures. Do not apply under

Riverdale Diuron 80WP Weed Killer 
g- -1 /3 
Page 7 
citrus trees that have been subjected to freezing within 6 months; do not apply in home 
plantings of citrus or in areas where the roots of other valuable plants or trees may 
extend as injury may result. 
ARIZONA (except Yuma area) AND CALIFORNIA (except Imperial and Coachelia Valleys) -
Oranges, Lemons and Grapefruits: Make a single application of 3 to 4 lbs. per acre as a 
broadcast spray shortly after grove has been laid up in final form (non-tillage program) 
in late FaIlor early Winter. As an alternative, apply 2 lbs. per acre in October or 
November, and repeat at the same rate in March or April. Subsequent annual applications 
of 2 to 3 lbs. will usually give adequate weed control. 
Florida: Use only as a band application. Do not use: "Trunk to Trunk." 
East Coast / Flatwoods Areas - (low permeable soils) 
Apply from 2 pound per acre to a maximum of 8 pounds per acre for control of annual 
broadleaf weeds and annual grasses. Addition of approved surfactant will improve control 
of emerged weeds. 
Do not use more than 8 pounds per treated acre in anyone application. 
Do not apply more thatn 12 pounds per treated acre per year. This amount coresponds with 
9.6 pounds of diuroD. the active ingredient in Diuron 80 WP. 
~he maximum allowable use rate for diuron is 9.6 pounds per treated acre per year 
inclusive of all diuron formulations used within 1 year. 
Ridge Areas - Except Highland Co - (highly permeable soils) 
Apply from 2 pounds per acre to a maximum of 4 pounds per acre for control of annual 
broadleaf weeds and annual grasses. Addition of an approved surfactant will improve 
control of emerged weeds. 
Do not use more than 4 pounds per treated acre in anyone application. 
Do not apply more than 8 pounds per treated acre per year. This amount corresponds to 6.4 
pounds diuron, the active ingredient in Diuron 80 WP. 
The maximum allowable use rate for diuron is 6.4 pounds per treated acre per year 
inclusive of all diuron formulations used within one year. 
Ridge Areas - Highland Co - (highly permeable soils) 
Apply to Dounds Der acre to a maximum of 4 pounds per acre for control of annual broadleaf 
weeds and annual grasses. Addition of an approved surfactant will improve control of 
emerged weeds. 
Do not use mor than 4 pounds per treated acre in anyone application. 
Do not apply more than 6 pounds per treated acre per year. This amount corresponds to 4.8 
pounds of diuron, the active ingredient in Diuron 80 WP. 
The maximum allowable use rate of diuron is 4.8 pounds per treated acre per year inclusive 
of all diuron formulations used within 1 year. 
Do not use at less than 60 day intervals. 
PlJORIBA (except Martin, Pain. Beach, BloNaxd and Bade COllnties) 01"&l1gC:5, 01"apCfluit, 
'I'angc}os and Tangcrincs. Apply 4 lbs. pcr acrc followcd by the same rate 4: to 6 months 
late!. As un altelnativc, make & single application of 4: to 8 lbs. pey acye. On 
Ilonbearing tYees, trcat .. hen Hintcr banl~s arc pulled dOVOll. 0n bcaring citrus, apply any 
time when >!Season rains alL expected. 
FOI control of purdglass, guincagrass/ lliuidcncdnc, plilitiOSe willow, :!lealllyrtle and 
loosestlife ill ditches adjacent to CitlUS glOves, use 1 lb. DidIon pel 1888 sq. ft. (40 
lbs. pey aCle) using sufficient spray volume (at least 4 gals. pel 1888 sq. ft.) to 
provide thOlough and unifolm coverage of the ditch. Apply ill the Spring before weed 
growth to COIltlol hard to kill species such as guineagIdSS. In bedded glovE?;/ do not 
trcat water furrows between the beds as illjULj to the tIees may result. 
TEXAS - Oranges and Grapefruit: Apply a single treatment of 2 to 4 lbs. per acre for 
annual weeds. Use 4 to 6 lbs. per acre for control of Johnsongrass seedlings. Best 
results accompany application in the Spring; well established weeds should be eliminated 
by cultivation prior to treatment. 
CORN (FIELD)

Riverdale Diuron BOWP Weed Killer '1 " I-=> Page 8 
POST-EMERGENCE - Apply 3/4 lb. per acre in combination with non-pressure nitrogen 
solution. If nitrogen solution is not used, apply 1 lb. Diuron per acre and add 1-1/2 
pts. of a surfactant per 40 gals. spray mixture. Apply as a single directed post­
emergence spray when the corn is at least 20 inches high and weeds are not taller than 3 
inches. DO NOT APPLY OVER TOP OF CORN. Do not replant to any crop within one year except 
that cottOD, corn and grain sorghum may be planted the Spring following treatment. 
PRE-EMERGENCE - ARKANSAS, LOUISIANA, MISSISSIPPI AND TENNESSEE - Make a single treatment 
of 2/3 to 1 lb. per acre as a broadcast or band treatment using the higher dosage on 
heavier soils (loarns, clay loam). Do not use on light (sand, loamy sand or gravelly) 
soils as injury may result; plant corn at least 1-1/2 inches deep; do not replant treated 
areas to crops other than corn or cotton within 4 months following band treatment and 6 
months following broadcast treatment as crop injury may result. 
COTTON 
PRE-PLANT: ARIZONA AND CALIFORNIA ONLY: Apply 1 to 2-1/2 lbs. per acre as a broadcast 
spray after furrows for pre-planting irrigation have been formed; apply either just prior 
to planting or after the pre-planting irrigation but before seed beds are dragged off in 
preparation for planting. 
Prior to planting, drag off the top of the seed bed and plant in untreated soil. Treated 
soil is returned to the bed after planting when irrigation furrows are reformed. If more 
:han 2 furrowing-out operations are performed prior to lay-by, weed control in the furrow 
bottoms may be lost. A lay-by application also may be made but the combined total per 
season must not exceed 1.2 lbs. Diuron 80WP per acre on clay. 
PRE-EMERGENCE (EXCEPT ARIZONA AND CALIFORNIA): Make a single application as a broadcast 
or a band spray after planting but before cotton emerges. Use at the following rates: 
BROADCAST TREATMENT 
SOIL TYPE SPRAY MIXTURE LBS. LBS. DIURON APPLIED 
DIURON IN 25 TO 40 PER ACRE 
GALS. WATER PER ACRE 
Loamy sand 0.6 0.5 
Sandy loam, loam, silt loam and silt 1.0 0.8 
Sandy clay loam, clay loam, 
silty clay loam, and sand clay 1. 25 1.0 
Silty clay and clay 2.0 1.6 
Do not use on sand as crop injury may result. 
BAND TREATMENT 
Use proportionately lessi for example, for 14 inch band on 42 inch row, use 1/3 of 
broadcast rate. 
Apply immediately after cotton is planted wherever possible. Planting and spraying should 
be combined in one operation. For best results, soil should be well prepared and as free 
as possible from trash and clods. Shallow incorporation (no deeper than 1/4 inch) with a 
rotary hoe or similar equipment following planting usually improves results particularly 
during the dry weather. A wide press wheel following planting should be used to provide a 
level seed bed for subsequent early season post-emergence treatments. 
Treatment usually provides weed control for a period of 3 to 8 weeks. sufficient moisture 
(usually 1 to 2 inches) in the form of rainfall or irrigation is necessary after treatment 
to carry the chemical into the root zone of germinating weeds; best results are obtained 
when this occurs within 2 weeks after application. If moisture is insufficient to 
activate Diuron BOWP or if soil becomes crusted before crop emerges, a shallow rotary 
hoeing (no deeper than 1/4 inch) should be made before weeds become well established. If 
initial seeding fails to produce a stand, cotton may be replanted in soil treated with 
Diuron 80WP. Wherever possible, avoid disturbing original bed. If necessary to rework 
soil before replanting, use shallow cultivation such as discing; do not relist nor move 
soil into the original drill area; plant seed at least 1 inch deep; do not retreat field 
with a second pre-emergence application of Diuron BOWP during the same crop year as injury 
to the crop may result. 
POST-EMERGENCE: EARLY SEASON: Apply in combination with surfactant as a directed spray 
when cotton is at least 6 inches tall and when weeds do not exceed 2 inches in height; a 
second application may be made if needed. Control of weeds under drought stress or over 2 
inches in height is usually impractical. Apply as a band treatment only, directing spray

Riverdale Diuron SOWP Weed Killer 
It} ?- /3 
Page 9 
to cover weed foliage. DO NOT SPRAY OVER TOP OF COTTON. Use pressure of 20 to 25 psi and 
adjust nozzles to minimize contact of cotton leaves with spray or drift, or crop injury 
may result. 
BAND TREATMENT 
AMOUNT PER ACRE OF CROPLAND WHEN APPLIED TO 
14" BAND ON 42" ROWS (IN 10 TO 15 GALS. WATER) 
Weed Problem Diuron 80WP Active Diuron 
Annual Weeds 0.18 lb. (2.8 ozs. ) 0.14 lb. 
Pigweed 0.09 lb. (1. 4 ozs. ) 0.07 lb. 
LATE SEASON (LAY-BY) - Use 1 to 1-1/2 lbs. Diuron 80WP (1 to 2 lbs. in Arizona and 
California) in 25 to 40 gals. water per acre as a directed spray (see Soil Limitations) 
Apply when cotton is at least 12 inches high (at least 20 inches for Pima S-2). Keep 
contact of spray or drift on cotton plants to a minimum. DO NOT SPRAY OVER TOP OF COTTON. 
For control of germinating weed seedling, apply immediately after last cultivation, 
directing spray to cover the soil beneath cotton plants and between rows. Alternatively, 
for control of emerged annual weeds (4 inches or less in height) at lay-by time, add 1 pt. 
Surfactant for each 25 gals. spray; apply as a directed spray to cover weed foliage 
Deneath cotton plants and between rows. NOTE: Treatment of ~ to 3/4 lb. Diuron SOWP per 
acre plus surfactant followed by the same treatment later, if needed, may be used as an 
alternate to the preceding recommendation. 
In irrigated cotton, best pre-emergence weed control is obtained if the field is irrigated 
within 3 to 4 days after application; thoroughly wet the surface of the ground over the 
row to carry the herbicide into the root zone of germinating weeds. 
Band pre- or post emergence 
Band pre- plus post-emergence 
or 
Broadcast pre-emergence (and 
(pre-plant) 
or 
Broadcast post-emergence 
(lay-by) 
SUBSEQUENT CROPS 
Any crop 4 months after last appli~ation. 
Cotton, soybeans, corn or grain sorghums 
(not sorgos or forage sorghums) the next 
Spring. Do not replant treated acres to 
any other crop within one year after last 
application as injury to subsequent crops 
result. 
Cotton, corn, grain sorghums (not forage 
sorghums nor grass sorghums) the next 
Spring. Do not replant treated areas to 
any other crop within one year after last 
application as injury to subsequent crops 
may result. 
NOTE: During a single crop season, do not exceed the following amount of Diuron per acre 
as injury to subsequent crops may result: O.S lbs. on loamy sand; 1.2 lbs: on sandy loam; 
1.6 Ibs. on clay loams; and 2.2 lbs. on clay. 
GLADIOLUS - EAST OF ROCKY MOUNTAINS: Apply 1 to 2 lbs. per acre as a pre-emergence and/or 
directed post-emergence treatments, if used for both do not exceed 1 lb. of Diuron per 
acre per application, Or a total of 2 lbs. per season. On cormel plantings, apply 1 lb. 
per acre pre- or post-emergence, but not more than once. Do not use on cormel plantings 
in Floridai do not spray over top of gladiolus foliage nor allow spray to drift onto 
foliage as injury may result. 
GRAPES: Apply only to established vineyards (at least 3 years old) as a band treatment to 
grape rows. Do not apply to vines with trunks less than 1-1/2 inches in diameter as 
injury may result. 
NOTE: On soils low in clay or organic matter (less than 2%) severe plant injury may 
result if unusually heavy rains follow treatment and this risk must be assumed by the 
user. 
EAST OF THE ROCKY MOUNTAINS: On soils low in clay or organic matter (1 to 2%), use 2 to 3 
lbs. per acre; on soils high in clay or organic matter, use 3 to 6 lbs. Apply in the 
Spring just prior to germination and growth of annual weeds. 
NEW YORK AND PENNSYLVANIA - CONTROL OF PERENNIAL GRASSES: Apply only to established 
vineyards (at least 4 years old) for spot control of perennial grasses such as quackgrass, 
ryegrass and orchard grass as a band treatment to ridged soil (2 to 4 inches high) under 
the trellis at the rate of 8 to 12 lbs. per acre. Band width should not exceed 30 inches. 
Make one application in the Spring of the year and do not apply the 8 to 12 Ibs. per acre

Riverdale Diuron BOWP Weed Killer 
/ I 1- /3 
Page 10 
rate more than once every 4 years. Use only on heavy soil types such as loarns, silt 
loams, clay loams. Do not use in areas where grape roots are shallow or exposed, because 
of high bedrock, poor drainage, or erosion, as injury to grapes may result. 
WEST OF THE ROCKY MOUNTAINS: Apply in December, January or February. For initial 
treatment, make a single application of 3 to 4 lbs. per acre, subsequent annual 
applications of 2 lbs. will usually give adequate weed control. As an alternative to the 
above schedule, apply 2 lbs. of Diuron BOWP per acre in October or November and repeat 
application at the same rate in March or April. 
GRASS SEED CROPS (Perennial): In areas as specified, apply only to established plantings 
at least 1 year old. 
COLORADO, KANSAS, NEW MEXICO AND OKLAHOMA: On switchgrass side oats grama and sand 
bluestem, apply 2 to 3 lbs. per acre during the dormant period shortly before weed 
seedlings emerge. Do not apply after crop begins growth in the Spring as crop injury may 
result. In fields where ash residues have accumulated from burning straw, use 3 lbs. per 
acre; spread chaff or straw with a harrow or chopper before application. 
WESTERN OREGON: On alfa fescue, Highland bentgrass, Astoria bentgrass, orchardgrass, 
Kentucky bluegrass (Merion bluegrass), apply 2 to 4 lbs. per acre between October 1 and 
November 15. In fields where ash residues have accumulated from burning straw, use 3 to 4 
lbs. per acre; spread unburned chaff or straw with a harrow or chopper before application. 
If perennial velvetgrass (Holcus lanatur) is a problem, use 4 lbs. per acre. For best 
results, apply as soon as possible after Fall rains start. Established weeds (beyond 2 to 
4 leaf stage) should be removed prior to treatment. 
Well established vigorous stands of Spring planted alfa fescue, orchardgrass and Kentucky 
bluegrass may be treated the following Fall provided the crop is planted before April 1 
and treatment is not applied before October lSj use Diuron BOWP at 2 Ibs. per acre. 
OLIVES - CALIFORNIA: Use only under trees established in the grove for at least 1 year. 
Do not apply in acres where roots of other valuable plants or trees may extend as injury 
may result. Apply 2 Ibs. per acre after the grove is laid up in final form in late 
October or November. A second application of 2 lbs. per acre should be made in March or 
April. Remove weed growth prior to treatment. Avoid contact of foliage with spray or 
drift. 
PINEAPPLE - HAWAII: Apply 4 to BIbs. per acre as a broadcast spray immediately after 
planting and prior to weed emergence. Use 4 lbs. per acre after harvesting plant crop 
(for ratoon crop). For plant crop only, a second and third broadcast or interspace 
application may be made prior to differentiation at the rate of 2 lbs. per acre at 
intervals of not less than 2 months. Additional applications to plant crop may be made as 
needed to interspace only using 2 lbs. per acre. Do not apply more than 3 broadcast 
sprays (maximum 12 lbs. per acre) prior to differentiation nor more than 16 lbs. total per 
acre per plant crop. Treated areas may be planted to pineapple or sugar cane 1 year after 
last application. 
PLUMOSUS FERN - FLORIDA: Treat only established stands at least 1 year old. Apply 3 lbs. 
per acre following hand weeding and 3 to 5 days after mowing of fern (see Soil 
Limitations) Do not cultivate or disturb soil after application as crop injury may 
result. 
SORGHUM (GRAIN) - SOUTHWESTERN STATES: Apply 1/4 to ~ lb. per acre as a directed post­
emergence broadcast or band treatment after sorghum is 15 inches tall to control weeds 2 
to 4 inches in height. DO NOT SPRAY OVER TOP OF SORGHUM. Add 1 pt. of a Surfactant per 
25 gals. spray. Apply at spray pressures of 20 to 25 psi to minimize drift. 
Use the lower rate on Broadleaved weeds up to 2 inches tall. Use the higher rate on 
grasses up to 2 inches and broadleaved weeds up to 4 inches tall. When the lower rate is 
used, a second application may be made if needed provided that the total herbicide applied 
in one crop year does not exceed ~ lb. of Diuron BOWP per acre. Treatment of weeds under 
drought stress is usually ineffective. Do not replant treated areas to crops other than 
cotton or corn within 3 months following band treatments and 6 months following broadcast 
treatment as crop injury may result. 
SUGAR CANE: To prevent possible crop injury on new cane varieties, tolerance to Diuron 
BOWP should be determined prior to adoption as field practice. Do not treat sugar cane 
growing on thinly covered subsoils or rocky areas as crop injury may result; see Soil 
Limitations. Temporary chlorosis of the crop may result from application over emerged 
canei to minimize chlorosis, use directed post-emergence sprays. 
FLORIDA: For high organic soils, apply 2 to 4 lbs. per acre as a broadcast or band spray 
prior to weed emergence after planting or after harvesting plant crop (for ratoon crop) . 
A second and third application of 2 lbs. per acre may be made as needed by directed spray 
inter row. Do not apply more than 3 treatments nor more than 6 Ibs. total per acre 
between planting (or ratooning) and harvest. 
HAWAII AND PUERTO RICO: Apply 4 to BIbs. per acre as a broadcast spray prior to weed 
emergence after planting or after harvesting plant crop (for ratoon crop). A second and 
third application of 2 to 4 lbs. per acre may be made as a broadcast spray over emerged

Riverdale Diuron 80WP Weed Killer J~ r /3 Page 11 
cane or by directed spray inter row. 
If weeds are emerged, add a surfactant to the spray mixture at the rate of 1 to 2 qts. per 
lOO gals. and apply as a directed spray. DO NOT SPRAY OVER TOP OF CANE. 
Do not apply more than 3 treatments nor more than 10 lbs. (Puerto Rico) or 12 Ibs. 
(Hawaii) total per acre between planting (or ratooning) and harvest. Treated areas may be 
planted to sugar cane or pineapple one year after last application. 
LOUISIANA: Use on plant cane seeded on fallowed ground. Make a single application of 3 
to 3-3/4 lbs. per acre at either of the following times, FALL TREATMENT (August through 
October) ~ Treat a 2 ft. band over the row after planting of cane, but before weeds Or 
cane emerge. SPRING TREATMENT (January through April) ~ if shaving and off-barring are 
practiced, treat a 2 ft. band over the row before weeds or cane emerge. 
WHEAT (WINTER): Seed bed must be well prepared before pre-emergence application. Crop 
injury may result if application is made to ground which is cloddy or compacted, resulting 
in exposed or improperly planted seed. Whenever seed bed preparation and planting are 
carried out during abnormally dry weather, resulting in a surface layer of dust over 
planted seeds, application should not be made until the dust is settled by rainfall or 
irrigation. Do not treat wheat planted less than 1" deep. 
Do not use on thinly covered or exposed sub-soil areas (clay knobs), as injury to the crop 
TIay resulti see Soil Limitations. Treated areas should not be replanted to any other crop 
within 1 year after last application as injury to the subsequent crop may result. 
Do not apply post~emergence treatments where Winter climatic conditions have caused 
heaving of wheat plants or after wheat has reached the boot stage as injury to the crop 
may result. 
KANSAS, OKLAHOMA AND TEXAS: Make a single post-emergence application at the rate of 1-1/2 
to 2 lbs. per acre. Apply in the Spring as soon as wheat (Fall~planted) starts to grow 
and before weeds are 2 inches tall. Application later than May 1 may give poor results. 
WASHINGTON, OREGON AND IDAHO: 
EAST OR CASCADE RANGE: Make a single application at the rate of 1 to 1~1/2 lbs. per acre. 
In areas having an average annual rainfall exceeding 16 inches: FALL TREATMENT - For 
early Fall-planted wheat (seeded before September 10), apply 3 to 6 weeks after planting 
but before weeds are 3 to 4 inches tall. Treatment after October 1 has generally given 
best results. Application should not be made after soil freezes in the Fall. Wheat 
planted in late October should not be treated until the following Spring. 
SPRING TREATMENT - Apply as soon as wheat starts to grow in the Spring. Treatment made 
prior to April 10 will usually give good results, provided weed growth is less than 4 
inches tall. Application later than May 1 may give poor results. 
NOTE: If Fall~planted wheat fails to grow due to Winter kill or adverse growing 
conditions after Fall treatment with Diuron, only fields treated before November 1 may be 
replanted to Spring wheat. Spring wheat should not be planted before April I, and only 
after deep discing and plowing to a depth of 4 to 6 inches prior to planting. Do not 
retreat field with a second application of Diuron BOWP during the same crop year or injury 
to crop may result. 
WEST OF CASCADE RANGE, Make a single application at the rate of 1-1/2 to 2 lbs. per acre. 
Apply as soon as possible following planting. If wheat and weeds have emerged, apply 
before weeds are 3 to 4 inches tall.

Riverdale Diuron BOWP Weed Killer 
1.3 ?- I,,}, 
Page 12 
STORAGE AND DISPOSAL 
STORAGE: Always store pesticides in a secured warehouse or storage building. Do not 
store near open containers of fertilizer, seed or other pesticides. Do not contaminate 
water, food, or feed by storage, disposal or cleaning of equipment. 
PESTICIDE DISPOSAL: Open dumping is 
used according to label instructions 
Federal, State or local procedures. 
disposal. 
prohibited. Waste or rinse water that cannot be 
must be disposed of according to applicable 
Place in closed, labeled container for proper 
CONTAINER DISPOSAL: Completely empty bag by shaking and tapping sides and bottom to 
loosen clinging particles. Empty residue into application equipment. Then dispose of 
empty bag in a sanitary landfill or by incineration, or if allowed by State and local 
authorities, by burning. If burned, stay out of smoke. 
NOTICE OF WARRANTY 
Seller warrants that this product conforms to the chemical description on the label 
thereof and is reasonably fit for purposes stated on such label only when used in 
accordance with directions under normal use conditions. It is impossible to eliminate all 
risks inherently associated with the use of this product. Ineffectiveness or other 
unintended consequences may result because of such factors as weather conditions, presence 
of other materials, or the manner of use or application, all of which are beyond the 
control of the seller. In no case shall the seller be liable for consequential, special, 
or indirect damages resulting from the use or handling of this product. All such risks 
shall be assumed by the buyer. Seller makes no warranties of merchantability or fitness 
for a particular purpose nor any other expressed or implied warranty except as stated 
above. (RV 062904)