crop-chem-docs/corpus/epa_ppls/228-320.md

# RIVERDALE 638 BROADLEAF HERBICIDE

- EPA Reg No: **228-320**
- Registrant: NUFARM AMERICAS, INC.
- Signal word: Danger
- Active ingredients: 2,4-D (12%); 2,4-D, 2-ethylhexyl ester (36.18%)
- Label accepted: 2003-07-29
- Source PDF: https://www3.epa.gov/pesticides/chem_search/ppls/000228-00320-20030729.pdf

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-~-"~ ..... ---.--~-------
RIVERDALE" 638 
BROADLEAF HERBICIDE 
A SPECIAL FORMULATION CONTAINING 2,4-0 ACID 
ACTIVE INGREDIENTS: 
2,4-Dichlorophenoxyacetic Acid .............. . 
Isooctyl (2-ethylhexyl) Ester of 2,4-Dichlorophenoxyacetic Acid 
INERT INGREDIENTS: .... . . . . . . . . . . . . . 
Contains Petroleum Distillates TOTAL 
12.00% 
36.18% 
51. 82% 
100.00% 
Isomer specific AOAC Method equivalent to 
Total 2,4-Dichlorophenoxyacetic Acid 36.0%, 3.0 lbs./gal. 
Riverdale is a Registered Trademark of Riverdale - A Nufarm Company 
KEEP OUT OF 1IBAClI OF CBILDRBIf 
DANGER - PBLIGRO 
Si usted no antiende la etiqueta, buaque a alguian para que 
ae la explique a uated an detalle. 
(If you do not understand the label, find someone to 
explain it to you in detail.) 
SEE INSIDE BOOKLBT FOR FIRST AID 
AND ADDITIONAL PRECAUTIODRY STATl!IIlDft'S 
NET CONTENTS GALS. 
.PA Reg. No. 228-320 BPA Bst. No. 228-IL-l 
MANUFACTURED BY NUFARM AMERICAS INC. BURR RIDGE, ILLINOIS 60527-0866 
Revised 5/15/03 
rCCEPTED 
JUt. 2 9 2003 
Revised First Aid per PR 2001-1 via Amendment. 
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Riverdale 638 Broadleaf Herbicide Page 
PRECAUTIONARY STA'l'EIIEN'l'S 
DANGER 
HAZARDS TO HUMANS AND DOIlESTrC ANrMALS 
Causes irreversible eye damage and skin irritation. Harmful if swallowed or absorbed 
through skin. Do not get in eyes, on skin or on clothing. Remove saturated clothing as 
soon as possible and shower. If this container is over one gallon and less than five 
gallons, then persons engaged in open pouring of this product must also wear coveralls 
or a chemical resistant apron. If this container is five gallons or more in capacity, 
do not open pour product from this container. A mechanical system (such as a probe and 
pump or spigot) must be used for transferring the contents of this container. If the 
contents of a non-refillable pesticide container are emptied, the probe must be rinsed 
before removal. 
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: face shield, goggles or 
safety glasses, and long pants, long-sleeved shirt, socks, shoes and chemical resistant 
gloves. It is recommended that safety glasses include front, brow, and temple 
protection. After using this product, rinse gloves before removing, remove clothing and 
launder separately before reuse, and promptly and thoroughly wash hands and exposed skin 
with soap and water. The maximum number of broadcast applications to turf per treatment 
site is 2 per year. 
NON-WPS INDUSTRrAL USES: When mixing, loading or applying this product or repairing or 
cleaning equipment used with this product, wear face shield, goggles or safety glasses 
and chemical-resistant gloves, long-sleeved shirt, long pants, socks and shoes. It is 
recommended that safety glasses include front, brow and temple protection. For aerial 
applicators in an enclosed cockpit and applicators applying this product from a tractor 
that has a completely enclosed cab, eye protection is not required. Wash hands, face 
and arms with soap and water as soon as possible after mixing, loading or applying this 
product. After work, remove all clothing and shower using soap and water. Do not reuse 
clothing worn during the previous day's mixing and loading or application of this 
product without cleaning first. Clothing must be kept and washed separately from other 
household laundry. 
WPS USES: Personal Protective Equipment - Some materials that are chemical-resistant to 
this product are listed below. If you want more options, follow the instructions for 
category E 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 such 
as Barrier Laminate, Nitrile Rubber> 14 mils, Neoprene Rubber> 14 mils and Viton > 14 
mils; shoes plus socks; and protective eyewear. Follow manufacturer's instructions for 
cleaning/maintaining Personal Protective Equipment (PPE). If no such instructions for 
washables . 'l~e detergent and hot water. Keep and wash PPE separately from other 
laundry. A.i't:er each day of use, clothing of PPE must not be reused until it has been 
cleaned. r~ this container is over one gallon and less than five gallons, mixers and 
loaders ~hu ~o not use a mechanical system (such as a probe and pump or spigot) to 
transfer contents 0f ~~is container must wear coveralls or a chemdcal resistant apron in 
addition t.o the ot h .. rcequj.red PPE. 
EngineeriI.l.~" C.)ntro] f:: ,St:atements: If this container is five gallons or more in capacity, 
do not open Dour prouuct from this container. A mechanical system (such as a probe and 
pump or spi"oc) must hoe used for transferring the contents of this container. If the 
contents of a non-re~-i 1.Iable pesticide container are emptied, the probe must be rinsed 
before removal. If the mechanical system is used in a manner that meets the 
requirem~nts :isted in the Worker Protection Standard (WPS) for agricultural pesticides 
[40 CF 170.240 (d) (4-6)], the handler PPE requirements may be reduced or modified as 
specifiec in ~he WPS.

Riverdale 638 Broadleaf Herbicide Page 
31 
3114 
When handlers use closed systems, enclosed cabs, or aircraft in a manner that meets the 
requirements listed in the Worker Protection Standard (WPS) for agricultural pesticides 
[40 CFR 170.240(d) (4-6)], 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. Remove PPE immediately after handling 
this product. Wash the outside of gloves before removing. As soon as possible, 
wash thoroughly and change into clean 
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: 
IF SWALLOWED: 
IF ON SKIN 
OR CLOTHING: 
NOTE 
TO PHYSICIAN: 
Hold eye open and rinse slowly and gently with water for 15 to 20 
minutes. Remove contact lenses, if present, after the first 5 minutes, 
then continue rinsing eye. Call a poison control center or doctor for 
treatment advice. 
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. 
Take off contaminated clothing. Rinse skin immediately with plenty of 
water for 15 to 20 minutes. Call a poison control center or doctor for 
treatment advice. 
Probable mucosal damage may contraindicate the use of gastric lavage. 
May pose an aspiration pneumonia hazard. 
ENVl:RONIIENTAL HAZARDS 
This product is toxic to aquatic invertebrates. Drift or runoff may adversely affect 
aquatic invertebrates and non-target plants. Do not apply directly to water, or to 
areas where surface water is present or to intertidal areas below the mean high water 
mark. Vapors from the product may injure susceptible plants in the immediate vicinity. 
Use care to avoid spray contact or drift to 2,4-D susceptible plants such as cotton, 
tomatoes, flowers, okra, grapes, fruit trees and ornamentals. Do not permit spray mist 
containing this product to drift onto them. Do not spray when the wind is blowing 
towards susceptible crops or ornamental plants. Use coarse sprays and/or low spray 
pressure to minimize spray drift. Do not apply with hollow cone type insecti.:i::e or 
other nozzles that produce fine spray droplets. Spray drift can be lessened JI keeping 
the spray boom as low as possible, by spraying when wind velocity is low, by j'2!:::reasing 
the pounds of pressure of the nozzle tips, and by stopping all spraying when ·~nc 
exceeds 6 to 7 miles per hour. On cropland and along roadsides, do ~~t exceed 20 psi 
pressure. Do not apply when a temperature air inversion exists. I~ questio~s exist 
pertaining to the existence of an inversion, consult with local wea~~?r serv~ces before 
making an application. Do not use the same spray equipment for applY~~4 other ••• 
materials to 2,4-0 susceptible crops as injury may result. It is b~.st...to use. a. •. 
separate sprayer for application of insecticides and fungicides. Cl~~and rinse spray 
equipment using soap or detergent and water or suitable chemical cleaner, and ~i.nse 
thoroughly before reuse for other spraying. Do not contaminate water when dis?0Sing of 
equipment washwaters. Do not apply this product through any type of irrigation system. 
Do not contaminate domestic or irrigation water.

Riverdale 638 Broadleaf Herbicide Page 
However, treated water may be used for watering turf grasses immediately after 
application. Do not use in or near a greenhouse. Excessive amounts of this product in 
the soil may temporarily inhibit seed germination and plant growth. 
Most cases of groundwater contamination involving phenoxy herbicides such as 2,4-D have 
been associated with mixing/loading and disposal sites. Caution should be exercised 
when handling 2,4-0 pesticides at such sites to prevent contamination of groundwater 
supplies. Use of closed systems for mixing or transferring this pesticide will reduce 
the probability of spills. Placement of the mixing/loading equipment on an impervious 
pad to contain spills will help prevent groundwater contamination. 
DXRECTXONS 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 be in the area during application. 
For any requirements specific to your State or Tribe, consult the agency responsible for f 
pesticide regulation. "~ 
AGRXCUL'l'tlJIAL USB REQUXREIIEN'l'S 
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 entry into treated areas during the restricted-entry interval 
(REI) of 48 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 such as Barrier 
Laminate. Nitrile Rubber> 14 mils. Neoprene Rubber> 14 mils. and Viton > 14 mils; <. 
shoes plus socks and protective eye wear. 'It' 
'--------------------------------------:------' .. 
NON-AGRXCUL'l'tlJIAL USB REQUXREMEN'l'S 
The requirements in this box apply to uses of this product that are NOT within the scope 
of the Worker Protection Standard (WPS) for agricultural pesticides (40 CFR Part 170). 
The WPS a8g~ies when this product is used to produce agricultural plants on farms 
forests,'~~~series or greenhouses. 
For turf }~~s, do not enter treatment areas until sprays have dried. Do not allow 
people (fJb1~I. than applicator) or pets on treatment area during application. 
, , 
GENBRAL XNFORMATXON 
. 
Riverdale 338 Broad1eaf Herbicide is a special formulation containing 2.4-0 acid. 
Riverdale 33-8 is mO'ce effective than 2.4-0 amines for controlling hard-to-kill weeds such 
as field bL1dweed. ;<..ls&ian knapweed, Canada thistle, leafy spurge. cattails, tules and 
nutgrass. 
Riverdale· 638 Broadleaf Herbicide should be applied when daytime temperatures are lower 
than 80 to 85 degrees. Spraying when temperatures are higher may cause rapid foliar burn 
and decrease the effectiveness of Riverdale 638. Treatment at higher temperatures also 
increases the possibility of crop injury.

Riverdale 638 Broadleaf Herbicide 
s(/<-{ 
Page 5 
INJURY TO CROPS FROM THIS HERBICIDE MAY OCCUR. 
DEGREE OF CROP INJURY, DO NOT USE THIS PRODUCT. 
IF YOU ARE NOT PREPARED TO ACCEPT SOME 
Crop varieties vary in response to 2,4-D and some are easily injured. Apply Riverdale 638 
only to varieties known to be tolerant to 2,4-D. If you are uncertain concerning tolerant 
varieties or local use situations that may affect crop tolerance to 2,4-D, consult your 
seed company or State Agricultural Extension Service for advice. 
MIXING INSTRUCTIONS 
Add one-half the required amount of water to the spray tank, then add the Riverdale 638 
with agitation, and finally, the balance of the water with continued agitation. Provide 
continuous agitation to insure uniform spray mixtures. Use spray mixture as soon as 
possible after mixing. 
COMPATIBILITY 
If Riverdale 638 is to be tank mixed with fertilizers or with other pesticides, 
compatibility should be tested prior to mixing. To test for compatibility, use a small 
container and mix a small amount (0.5 to 1 quart) of spray, combining all ingredients in 
the same ratio as the anticipated use. If any indications of physical incompatibility 
develop, do not use this mixture for spraying. Indications of incompatibility usually 
will appear within 5 to 15 minutes after mixing. Read and follow the label of each tank­
mix product used for precautionary statements, directions for use, geographic and other 
restrictions. 
COMBINATION WITB LIQUID NITROGEN FERTILIZER 
Use the recommended amount of Riverdale 638 Broadleaf Herbicide per acre for weeding and 
feeding corn, small grains, grasses for production or grass pastures as directed on this 
label. Use the fertilizer at rates recommended by supplier or Extension Service 
Specialist. Fill the spray tank about half full with the liquid fertilizer, then add the 
Riverdale 638 with vigorous agitation, and complete filling the tank. Apply immediately 
and continue agitation in the spray tank during application. Do not allow mixture to 
stand overnight. NOTE: Fertilizers can increase foliage contact burn of herbicides. 
Reducing the fertilizer rate and concentration will reduce the hazard of leaf burn. 
GEIIIBRAL WEBD LIST 
ANNUAL AND BIENNJ:AL WEEDS 
annual yellow sweetclover 
*beggarticks 
bull thistle 
coffeeweed 
*common broomweed 
common burdock 
common cocklebur 
common evening primrose 
common larnbsquarter 
croton (Texas or wooly) 
galinsoga 
jimsonweed 
*knotweed 
·mallow (venice or little) 
rnarshelder 
morningglory (common, ivy, woolly) 
*musk thistle*** 
mustards (except blue mustard) 
pepperweeds (except perennial) 
··pigweeds (Amaranthus spp.) 
·prickly lettuce 
ragweed (common or giant) 
rough fleabane 
·Russian thistle 
*salsify (western or common) 
*smartweeds (annual species) 
sowthistle (annual or spiny) 
sunflower 
velvetleaf 
*vervains 
vetches 
*wild carrot 
wild lettuce 
wild parsnip 
wild radish 
........ . 
PERENNIAL WEBDS 
*alfalfa 
*Austrian fieldcress 
*bindweed (hedge, field and European) 
blue lettuce 
*hoary cress 
Jerusalem-artichoke 
*many-flower aster 
*nettles (including stinging) 
.. .... 
;" ..

Riverdale 638 Broadleaf Herbicide Page 6 
*Canada thistle 
catnip 
chicory 
dandelion 
*docks 
*dogbanes 
*goldenrod 
*ground ivy 
healall 
PERENNXAL WEEDS 
*orange hawkweed 
plantains 
sowthistle (perennial) 
*tansy ragwort 
Texas blueweed 
*vervains 
*western ironweed 
*wild garlic 
*wild onion 
*These species may require repeat applications and/or use of higher rate recommended on 
this product label even under ideal conditions for application. 
**Control of pigweeds in the High Plains area of Texas and Oklahoma may not be 
satisfactory with this product. 
***Not registered for control of musk thistle in California. 
SPECIFIC USE DIRECTIONS 
CEREAL GRAIN CROPS 
WHEAT and BARLEY (not underseeded with legumes) 
WEEDS IN CROP 
Postemerg-snca 
Annual and biennial weeds 
Perennial broadleaf weeds 
Wild onion or garlic 
Emergency weed control in 
wheat 
Perennial broadleaf weeds 
AKOllN'l' OJ!' 
RIVERDALE 
638 
PER ACRE 
13.6 ounces 
27.4 ounces* 
20.5 ounces 
to 
27.4 ounces 
41.0 ounces* 
DIRECTIONS 
Apply after grain is fully tillered 
(usually about 4 to 8 inches high) but 
not forming joints in the stern. Apply 
when weeds are near bud stage. Do not 
spray grain in boot to dough stage. 
Apply 20.5 ounces when grain is fully 
tillered and wild garlic or onion plants 
are small. Apply 27.4 ounces after 
harvest in the crop stubble. For control 
of new fall growth of wild onion or 
garlic, refer to FALLOW LAND use 
directions. 
Apply when weeds are approaching bud 
stage, but do not spray grain during the 
boot to dough stage. The 41.0 ounces per 
acre application can produce injury to 
wheat. Balance the severity of your weed 
problem against the possibility of crop 
damage. Where perennial weeds are 
scattered, spot treatment is suggested to 
minimize the extent of crop injury. 
~----- .. -----------+-----------~------------------~~~----~ Preharves:: 13.6 ounces 
to 
27.4ounces* 
Apply when grains are in the hard dough 
stage to suppress large weeds that may 
interfere with harvest. Best results 
will be obtained when soil moisture is 
sufficient to induce succulent weed 
growth. 
DO NOT USE IN CALIFORNIA. 
*Use the luwer rate if small annual and biennial weeds are the major problem. Use the 
higher rat~' If perennial weeds or annual and biennial weeds are present which are in the 
hard-to-k~ll ~ategories as determined by local experience. The higher rates increase the 
risk of g:L:<..J.i..l injury and should be used only wher~ weed control problems justify the risk 
of grain damage. Do not apply to grain in the seedling stage.

Riverdale 638 Broadleaf Herbicide Page 
RESTRICTIONS AND LIMITATIONS FOR USE ON CEREAL GRAINS 
For aerial application on grain, apply Riverdale 638 in 2 or more gallons of water per 
acre. For ground application, a minimum of 10 to 15 gallons of water per acre is 
recommended for proper spray coverage. Do not mix with oil for crop uses. 
Do not permit dairy animals or meat animals being finished for slaughter to forage treated 
grain fields within 2 weeks after treatment. 
Do not feed treated straw to livestock if a preharvest treatment or emergency treatment as 
described above is applied. 
FIELD CORN 
AMOUNT OF 
RIVERDALE 
638 PER 
WEEDS IN CROP ACRE DIRECTIONS 
Praplant 20.5 ounces To control emerged broadleaf weed 
to seedlings or existing cover crops prior 
34.2 ounces to planting corn, apply 7 to 14 days 
before planting. Do not use on light, 
sandy soil, or where soil moisture is 
inadequate for normal weed growth. Use 
high rate for control of less susceptible 
weeds or cover crops such as alfalfa. 
Preemergence 27.4 ounces To control broadleaf weeds, apply 3 to 5 
to days after planting but before corn 
41.0 ounces emerges. Use high rate on soil high in 
organic matter. Do not use on light, 
sandy soil, or where soil moisture is 
inadequate for normal weed growth. 
DO NOT USE IN CALIFORNIA. 
Postemergence 
Annual broadleaf weeds 6.8 ounces Avoid spraying just after the first corn 
leaves unfold, as injury may occur. 
Apply when weeds are small and corn is 
less than 8 inches tall (to top of 
canopy) . If corn more than 8 inches tall 
must be sprayed, use drop pipes. 
Perennial broadleaf weeds 13.6 ounces Spray when weeds are in the bud to bloom 
stage. If corn is more than 8 inches 
tall, use drop pipes to keep spray off 
corn leaves. Do Dot apray in taaa.l to 
daDt ataga. 2,4-0 may make corn brittle. 
Winds or cultivation may cause stalk 
breakage while brittle. 
PreharvaBt 20.5 ounces After the dent stage to suppr",I.!;'w,eeds 
to that interfere with harvest, stlch c as 
34.2 ounces bindweed, cocklebur, dogbane, ,:l i~\l;pnweed, 
ragweed, sunflower, and vel vetl<!af~ and 
to decrease producti~~'~f:weed s~eds, 
, spray with air or ground ~qui~~9~, The 
high rate will be needtd·tor ~eeds under 
stress. •• • ••• • . DO NOT USE IN CALIFORlf~M ....... . ........ .. . ...... ..... 
• • •

Riverdale 638 Broadleaf Herbicide Page 8 
POPCORN* 
AMOUNT OF 
R:IVERDALE 
638 PER 
WEEDS :IN CROP ACRE DIRECT:IONS 
Preharvest 20.5 ounces After the dent stage to suppress weeds 
to that interfere with harvest, such as 
34.2 ounces bindweed, cocklebur, dogbane, jimsonweed, 
ragweed, sunflower and velvetleaf, and to 
decrease production of weed seeds, spray 
with air or ground equipment. The high 
rate will be needed for weeds under 
stress. 
DO NOT USE IN CALIFORNIA. 
RESTR:ICTIONS AND L:IMITATIONS FOR USE ON FIELD CORN AND POPCORN 
A minimum application volume of 2 gallons per acre by air or 10 gallons per acre by ground 
is recommended. 
Do not forage or feed corn fodder for 7 days following application. 
GRAIN SORGRtJII (milo) 
AMOUNT Olf 
RIVERDALE 
638 PER 
WEEDS IN CROP ACRE DIRECTIONS 
Annual broadleaf weeda 13.6 ounces Treat when sorghum is 6 to 15 inches 
Perennial broadleaf weeds 20.5 ounces tall. If sorghum is taller than 8 
inches (to top of canopy), use drop 
nozzle to keep spray off crop foliage. 
Do not treat during the boot, flowering, 
or early dough stages. 
RESTR:ICTIONS AND LIMITATIONS lfOR USB ON SORGRtJII 
A minimum application volume of 2 gallons per acre by air or 10 gallons per acre by ground 
is recommended. 
Do not forage or feed Sorghum fodder for 7 days following application. 
SOYBEANS (PREPLANT ONLY) 
AMOtlN'l' OF , . , RIVERDALE 
638 PER 
WI:BD3 IN CROP ACRE DIRECTIONS 
-----
Preplant , 21.3 fluid Apply not less than 7 days prior to 
.. , ounces planting soybeans, when weeds are small 
(0.5 lb. and actively growing. Use the higher 
, . a.e./acre) rate on larger weeds and when perennials 
are present. Some weeds may require 
repeat treatment for adequate control 
(see GENERAL WEED LIST and below) .

Riverdale 638 Broadleaf Herbicide 
WEEDS IN CROP 
AMOUNT OF 
RIVERDALE 
638 PER 
ACRE 
42.6 fluid 
ounces 
(1.0 lb. 
a.e. /acre) 
Page 9 
DIRECTIONS 
Apply not less than 30 days prior to 
planting soybeans when weeds are 
actively growing. Some weeds may 
require repeat treatment for adequate 
control (see GENERAL WEED LIST and 
below) . 
In addition to the weeds found on the 
GENERAL WEED LIST, Riverdale 638 will 
suppress or control the following 
broadleaf weeds frequently encountered 
in reduce tillage soybean production 
systems: bullnettle, smallflowered 
bittercress, Carolina geranium, 
smallflowered buttercup, common and 
rough, cinquefoil, red clover*, 
horseweed or marestail, mousetail, wild 
mustard, field pennycress, cutleaf 
evening primrose, common purslane, 
speedwell and Virginia copperleaf. 
*These weeds are only partially 
controlled. 
Apply no more than 42.6 fluid ounces of 
Riverdale 638 in one season prior to 
planting soybeans. After applying, 
plant soybean seed as deep as practical 
or at least 1-1/2 to 2 inches deep. 
Adjust the planter press wheel, if 
necessary, to ensure that planted seed 
is completely covered. 
If desired, Riverdale 638 may be applied 
pre-plant to soybeans in tank mixtures 
with other herbicides such as Poast, 
Poast Plus, Roundup, Roundup D-Pak, 
Honcho, Gramoxone Extra, Prowl, Pursuit 
Plus, Scepter, Scepter 70 DG, Squadron 
and others that are registered for pre­
plant soybean use. 
APPLICATION RESTRICTIONS AND PRECAUTIONS: Important Notice - Unacceptable injury to 
soybeans planted in fields treated with Riverdale 638 may occur. Whether or not soybean 
injury occurs and the extent of the injury will depend on weather (temperature and 
rainfall) from herbicide applications until soybean emergence and agronomic faC;t;qIS such 
as the amount of weed vegetation and previous crop residue present. Injury is more likely 
under cool rainy conditions and where there is less weed vegetation and crop ..... -es-ic:.ue 
present. 
Do not use on low organic dandy soils «1.0%). 
Apply a maximum of one application per growing season regardless of rhe" treat;:J.ent rate. 
Livestock grazing restriction: Do not feed hay, forage or fodder. Restrict livestock 
from grazing treated fields. Livestock should be restricted from feeding/gra::inii of 
treated cover crops. 
Do not apply Riverdale 638 prior to planting soybeans if you are not prepared to accept 
the results of soybean injury, including possible loss of stand and yield.

Riverdale 638 Broadleaf Herbicide Page 10 
Do not replant fields treated with Riverdale 638 in the same growing season with crops 
other than those labeled for 2,4-D use. 
GRASSES GROWN FOR SEED PRODOCTXON 
AMOUNT OF 
RXVERDALE 
638 PER 
WEEDS XN CROP ACRE DXRECTXONS 
Annual broadleaf weeds 13.6 ounces Apply to established stands in the 
to spring before the seed head comes into 
20.5 ounces the boot stage. Do not spray in boot 
stage of growth. In seedling grasses, 
Perennial and biennial 27.4 ounces apply in the spring after the grass has 
broadleaf weeds to tillered or has at least 5 leaves but 
41. 0 ounces before the boot stage. Use only the low 
rate on seedling grasses. 
DO NOT USE IN CALIFORNIA. 
WEEDS AND BRUSH XN PASTURES, RANGELAND, 
FALLOW LAND AND CONSERVATXON RESERVE PROGRAM AREAS 
AMOUNT OF 
RXVERDALE 
638 PER 
WEEDS XN CROP ACRE DXRECTXONS 
Annual broadleaf weeds 34.2 ounces Apply in spring or fall when annual 
weeds such as knotweed or common 
chickweed are up but still small and in 
or near the seedling stage, and growing 
vigorously. Also controls cocklebur, 
galinsoga, lambsquarters, mustards, 
pigweed, ragweed and sunflower. 
Perennial and biennial 41. 0 ounces To control dandelion, plantain, and most 
broadleaf weeds to other common broadleaf weeds in turf, 
85.3 ounces apply in spring or fall when these weeds 
are growing actively. Treat wild garlic 
or onion in three successive seasons 
(Example: Spring, Fall, Spring. ) 
RESTRXCTXONS AND LXMXTATXONS FOR USE ON RANGELAND AND PASTURES 
A minimum application volume of 2 gallons by air or 5 to 10 gallons by ground is 
recommended for pastures. 
On pastures and rangeland, do not exceed 2 pounds a.e. per acre per application per site. 
When usin;r' 'on Pastures and Rangeland Grasses, there is a (1) 7 day pre-grazing interval 
for dairy cattle: (2) 30 day preharvest interval for grass cut for hay: and (3) 3 day pre­
slaughter i~tcrval for meat animals.

Riverdale 638 Broadleaf Herbicide Page 11 
OIlNAME!l'l'AL TURF (GOLF COURSES. 
CEMETERIES PARKS AND OTHER TURF AREAS) • 
AMOONT OF 
RIVERDALE 
638 PER 
WEEDS IN CROP ACRE DIRECTIONS 
Annual broadleaf weeds 34.2 ounces Apply in spring or fall when annual 
weeds such as knotweed or common 
chickweed are up but still small and in 
or near the seedling stage, and growing 
vigorously. Also controls cocklebur, 
galinsoga, lambsquarters, mustards, 
pigweed, ragweed and sunflower. 
Perennial and biennial 41. 0 ounces To control dandelion, plantain, and most 
broadleaf weeds to other common broadleaf weeds in turf, 
85.3 ounces apply in spring or fall when these weeds 
are growing actively. Treat wild garlic 
or onion in three successive seasons. 
(Example: Spring, Fall, Spring. ) 
RESTRICTIONS AND LIMITATIONS FOR OSE ON OIlNAME!l'l'AL TURF AREAS 
A minimum application volume of 25 gallons per acre is recommended for use on turf. 
Do not apply to newly seeded areas until sod is formed and grass has been cut a few times. 
Do not use Riverdale 638 for susceptible southern grasses such as St. Augustine. 
Bentgrass and clover may be injured by this treatment. 
Do not exceed 2 pounds a.e. per acre per application per site. 
Do not apply more than 2 broadcast applications per year per treatment site. This does 
not include spot treatment. 
CONSERVATION RESERVE PROGRAM AREAS 
AMOONT OF 
lUVERDALE 
638 PER 
WBBDS IN CROP ACRE DIRECTIONS 
Annual broadleaf we.ds in 9.1 to 18.2 ounces Apply to actively growing annual 
young gra •• es 9.1 to 36.5 ounces broadleaf weeds. Use 9.1 ounces to 
18.2 ounces when weeds are small; use 
higher rates on older weeds. Do not 
apply to young grasses with fewer than 
6 leaves or prior to tillering, as 
excessive injury may result, 'Dv not 
apply more than 18.2 ounces tl.ul''';'l 
grasses are well established Cl~\ 
excessive injury may result. ' , . 
Biennia1 and perennial • 36.5 to 68.4 ounces Treat when biennial weens are in the 
broadleaf weeds in 73.0 ounces seedling to rosette di't;age ar!d'oerore 
established grasses flower stalks become • i.pparen t ••• Trea t 
perennial weeds in .t4",. bud t!",.l;>J.t>om 
stage. Apply to a«th",1y growing 
weeds. • ••• 
RESTRICTIONS AND LIMITATIONS FOR USE ON CONSERVATION RESERVE PROGRAM Aani3; 
Use at least 2 gallons of water per acre by air and 5 gallons of water per acre by ground.

Pj1r 
Riverdale 638 Broadleaf Herbicide Page 12 
Do not harvest or graze treated Conservation Reserve Program areas. 
Do not apply to grasses in the boot to dough stage if grass seed production is desired. 
FALLOW LAND AND CROP STUBBLE 
AMOUNT OF 
RIVERDALE 
638 PER 
WEEDS IN CROP ACRE DIRECTIONS 
Annual broadleaf weeds 18.2 ounces Use the lower rate when weeds are small 
to (2 to 3 inches tall) and growing 
36.5 ounces actively_ Use the higher rate on older 
and drought-stressed plants, except as 
directed in the SPECIAL WEED PROBLEMS 
section of this label 
Biennial broadleaf weeds 36.5 ounces Spray while musk thistles or other 
to biennial species are in the seedling to 
73.0 ounces rosette stage, and before flower stalks 
become apparent. The lower rate can be 
used in spring during rosette stage. In 
fall or after flower stalks have 
developed, use the highest rate, except 
as directed in the SPECIAL WEED PROBLEMS 
section of this label. 
Perennial broadleaf weeds 41.1 ounces Spray weeds in bud to bloom stage, or in 
to good vegetative growth. Do not disturb 
109.5 ounces treated area for at least 2 weeks after 
treatment, or until weed tops are dead, 
except as directed in the SPECIAL WEED 
PROBLEMS section of this label. 
Wild garlic and onion in 73.1 ounces Apply to new regrowth of wild onion or 
crop stubble to garlic which occurs in the fall 
109.5 ounces following harvest of small grains, 
soybeans, corn or grain sorghum. 
RESTRICTIONS AND LIMITATIONS FOR OSE ON FALLOW LAND AND CROP STUBBLE 
A minimum spray volume of 2 gallons per acre by air or 10 to 15 gallons per acre by ground 
is recommended. 
Do not plant treated fallow land until 3 months after treatment or until chemical has 
disappeared from soil. 
Do not graze dairy animals on treated areas within 7 days of treatment. 
WEEtlI'I :iN CROP 
WEEDS AND BROSH IN NON-CROP AREAS 
FENCEROWS, ROADSIDES, VACAN'l' LOTS, AIRFIELDS, 
RAILROAD AND HIGHWAY AND UTILITY RIGHTS-OF-WAY, 
AND OTHER NON-CROP AREAS 
• AMOUNT OF 
RIVERDALE 
638 PER 
ACRE DIRECTIONS 
Annual broadleaf weeds 36.4 ounces Apply when most weeds are still 
to and growing vigorously, except 
young 
as 
73.1 ounces directed in the SPECIAL WEED PROBLEMS 
section of this label.

)3)'1 
Riverdale 638 Broadleaf Herbicide Page 13 
WEEDS :IN CROP 
Perennial and biennial 
broadleaf weeds 
AMOUNT OF 
R:IVERDALE 
638 PER 
ACRE 
54.8 ounces 
to 
109.5 ounces 
SMALL AREA APPL:ICAT:IONS FOR NON-CROP USE 
D:IRBC'r:rONS 
Apply when weeds are actively growing 
and near the bud stage, but before 
flowering. For best results on tansy 
ragwort and musk thistle, treat in 
rosette stage, before bolting. A second 
application is usually needed for best 
results on thistle, nettle, and 
bindweed. Treat wild onion or garlic in 
early spring and in fall when they are 
young and growing actively, except as 
directed in the SPECIAL WEED PROBLEMS 
section of this label. 
For control of broadleaf weeds in small non-crop areas with hand-held or back-pack 
sprayers, mix 4.3 fluid ounces of Riverdale 638 per gallon of water. Thoroughly wet all 
weed foliage. Maintain agitation of mixture. 
SPECJ:AL WEED PROBLEMS 
D:IRECT:IONS FOR SPBCJ:AL WEED PROBLEMS :IN PABTURBS~ FALLOW LAND, IlION-CROP AND CONSERVAT:ION 
RESERVE PROGRAM, AND CONSERVAT:ION RESERVE ACREAGE 
To control the following special weed problems in fallow land, non-crop areas, or 
pastures, apply the rates indicated at the recommended application time in sufficient 
spray volume by air or ground to obtain thorough and uniform coverage. Thorough and 
uniform coverage may require high volume ground spraying at 50 gallons per acre or more or 
aerial spraying at 10 gallons per acre or more when weed growth is dense. Adequate soil 
-moisture for weed growth is essential for good control. 
WEEDS :IN CROP 
musk thistle 
field bindweed 
hoary cress 
leafy spurge, 
Russian knapweed 
Canada thistle, 
camel thorn, lotus 
Canada thistle 
Canada thistle 
cattails, tule 
(hard-stem bulrush) 
AMOUNT OF 
RJ:VERDALE 
638 PER 
ACRE 
41.1 to 54.8 
ounces 
41.1 to 54.8 
ounces 
54.8 ounces 
54.8 ounces 
54.8 ounces 
54.8 ounces 
41.1 to 68.4 
ounces 
82.1 ounces 
D:IRBCT:IONS 
rosette stage spring or fall; use higher 
rate in fall 
bud to full bloom 
bud to full bloom 
full bloom • , , , 
• , ,. . , 
, , . , , . , , , • bud to early bloom 
0 
o 0 
,. ,. . , ,. ,. 
o in spring or summer •••••• o 0 
6 to 8 inches high in fdll, p~'c!fOto a 
killing frost with g~'~Qil mctf~eure. 
Do not till treated a~'within 1 days 
of treatment .... • • •••• 
late spring to early summer when 4.to 6 
feet tall; repeat in fall and '50i1Qwing 
spring.

Riverdale 638 Broadleaf Herbicide 
AMOUNT OF 
RJ:VERDALE 
638 PER 
WEEDS IN CROP ACRE DIRECTIONS 
tansy ragwort 82.1 ounces rosette stage to early bloom 
nutgrass 82.1 ounces 6 to 8 inches high, before bloom; repeat 
when regrowth is 6 to 8 inches high 
Refer to the restrictions and limitations for use on these sites. 
STORAGE AND DISPOSAL 
STORAGE: Always use original container to store pesticides in a secured warehouse or 
storage building. Containers should be opened in well ventilated areas. Do not stack 
cardboard cases more than two pallets high. Keep container tightly sealed when not in 
use. Do not store near open containers of fertilizer, seed or other pesticides. Do not 
contaminate water, food or feed by storage or disposal. 
PESTICIDE DISPOSAL: Pesticide wastes are toxic. If container is damaged or if 
pesticide has leaked, contain all spillage. Absorb and clean up all spilled material 
with granules or sand. Place in a closed labeled container for proper disposal. 
Improper disposal of excess pesticide, spray mixtures, or rinsate is a violation of 
Federal law and may contaminate groundwater. If these wastes cannot be disposed of by 
use according to label instructions, contact your State Pesticide or Environmental 
Control Agency, or the Hazardous Waste representative at the nearest EPA Regional Office 
for guidance. 
CONTAINER DISPOSAL: Triple rinse (or equivalent). Then offer for recycling or 
reconditioning, or puncture and dispose of in a sanitary landfill, or by other approved 
State and local procedures. Plastic containers are also disposable by incineration, or 
if allowed by State and local authorities, by burning. If burned, stay out of smoke. 
Local conditions may affect the use of this chemical. Consult State Agricultural 
Extension or Experiment Station weed specialist for specific recommendations for local 
weed problems and for information on possible lower dosages. 
WARRANTY 
Follow directions carefully. Timing and method of application, weather and crop 
conditions, mixtures with other chemicals not specifically recommended, and other 
influencing factors in the use of this product are beyond the control of the seller. 
Buyer assumes all risk of use, storage or handling of this material not in strict 
accordance with directions given herewith. (RV 051503) 
,