# CO-OP 334 ESTER WEED KILLER

- EPA Reg No: **1381-126**
- Registrant: WINFIELD SOLUTIONS, LLC
- Signal word: Caution
- Active ingredients: 2,4-dichlorophenoxyacetic acid, butyl ester (51%)
- Label accepted: 1973-01-09
- Source PDF: https://www3.epa.gov/pesticides/chem_search/ppls/000912-00072-19730109.pdf

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co-op 
334 Ester 
Weed Killer 
Use Precautions 
Do not apply CO-OP 334 Ester directly to. or 
oUler,Vlse perm,t ,tto corr.e ,~ contact with 
.egetables flowers grapes frUit !rees. orna­
mentals co11on or other desirable plants wn,rh 
are sensitive to 2.4-0 and Similar materials. and 
dO not permit spray mist containing It to drift 
onto then,. SHice e','en minute quantities 01 the 
spray may cause severe Inlury dUring both 
grOWing ar,d dormant periods. (Coarse sprays 
are less !,ke'y to drift i Accordingly, appllca­
I,ons by alrpl3ne. ground rigs. and hand dls­
cenSers should be camed out only when there 
's flO hazard from drift Do not apply by airplane 
In the viCinity of cotton. grapes. or other 
des:rable 2 ~-O susceptible vegetation. Since 
',a"o's of the es:er contained In CO-OP 334 
Ester may Inl~.He ~'Jscept'ble plants In the 
V,C,'1·ty of application use only where there is 
flO hazard from such vapOrIZation Do not apply 
10 newiy seeded turf. 
Most legumes are usually damaged or kll!ed 
1)0 'l01 contaminate ,rrlgatlor, ditches or water 
, sed for domestic purposes ExceSSive a'llounts 
J' 2 .l-dlchlorophenoxyacetlc aCid In the SOil 
., av ~empcrar:y ,nhlb!t seed germination or 
Dlant gro.vt~ Do not store near fertilizers 
s('ecs Insertle'ces or fJ'lg!cldes 
TJ avolo :r-,u'l:o deSirable plants dO not 3tore. 
hZl"d:c or appif other ao',c.I)tura' chemlcais 
:, --, tf]e sa"'c cor,tal~e's Of eOu'pment used for 
~_~',' OP ''1.: :c ~~E' Do nut Slore '-ear fer:II,zers. 
SP.HJS r"~,rc!~(,ces or fUIlQ,c!des 
T" .; 0' Y;.:: -, ~:. : Ie f.~'~ "eep oul of lakes. 
"lrl'arr-'~ '," ~ i' ~C,. Do '-'e,1 use .... here run-c.ff IS 
..:e. t_"" :.: ~.r LJ::: n .• J~~"', Io~when weather 
'-r ,>I.ors 'a,_' ',' ~I 'rcc'" areas trez'tec Da not 
'" '-:1'" nate .\ij'" t,! r'0dr,ng of equipment. 
'r ;.~;PsZl :' \\]01',"5 AGe'y thiS pro~uct only 
.-1 ' ~)rL<:' , e~1 ,~'n H" S abe! 
;:; r-sr. 'elL; ,- .. ,._",t and r·_.()til.~ers and dispose 
-. ,\' ~-:-,~P~ tl'~ t~i...r".r~J !r ~CJr:·crop areas awa"i 
'. '~~ ."Jtf~' Sl'~-~";(\~~ Cor!alners should be 
: ~· .. r'l.-spj ,:)~ b" iJuf"""'Ch ~I\l h~:es:n them and 
~.".', ''OJ :. ", :.:1stf"· Drun'S "lily be returned 
"ndr' "fa'~tllr(l~ 
CAUTION 
HiHILful If SWdlll)weeJ 
r, . " 
... , : . j,., \ , t ',1' t, ',. , l' ; , r' 
» 
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ACCEPTED 
UtElL'i TI-ll: rr[,l :1;' _ 1t<'i"clF::m: 
n;",G:CiDr:,r.;r. ,,;"'l>!,h rICID,: AC1 
1'0:; E-:ONC;.;iC h)ISO~ RF.CISTE:, 
CO -0 p.' "'0," :G il.~ -~2 
334 Ester 
Weed Killer 
Contains Butyl Ester of 2,4-0 
Acid Equivalent: 3V3 Pounds Per Gallon 
Active Ingredient: 
2.4-Dichlorophenoxyacetlc ac:d butvl esters 
Inert Ingredients. 
Total. 
51,0% 
49,0% 
.100.0% 
2.4-0Ichloroohenoxyacetlc aCid eqUivalent 407°0 31 J Ib.!ga'lon 
CAlJTI 0 N: Keep Out of Reach of Children 
See side panel for additional cautions 
Net Contents 
Manufilc lured f,,' 
co-op 
334.Ester 
Weed Killer 
Wood, Plant Control in Gra .. Pastures and 
fenc9 RQws: Use 2 to .1 cuaris o/-CO-OP 334 
Fster to 100 gallons '.vater as a spray to the 
follilt:;e stems ard trunks c f susceptible plants 
prefe'ably In the spring aft9r maximum foliage 
devet')pment ThiS may rec.ulre up to 400 
gallo'ls of spray per acre cependlng on brush 
helgrt and denSity Alder ~Iderberry. col1on­
~o_od haz~l. locust SLlmdC w1!.<=!.9rape and 
t~()se I,sted abl)ve unjer P;istures are suscepl,­
ble For more resistant sDe:ies a"d stands of 
fTllxec' b'ush which ,,,cludt berr" bushes a"d 
, .... t1d rose use a n',xkre c' equal parts of 
CO-CP 33.l EstP' aw' :: .l 5T at the rate of 2 
to 4 quarts :.' t"" f:',:-:1U''' per tCO gal ions of 
-.vater We' :': tOllage t"c_': .Jci"v 
ire .~L,i: surfaces of ~.tu:r:£s of !"ees and tad 
br~sh Pl(lV be treatej 'l'. :~t; one fY"l"xtL4 re Ip'-,~.'-­
[,ctrts c·' CO- OP 33~ E s!e r ::i'-,S 2 1 r. - T· Cit tr~ 
r~~e cf 1 G.;,! ;r 2 92 ',~'.':' ~ I?~C"'! ~ .••. -. !,~ r rp,~.··· 
lo,qr",",t'") \,,,Ii=-t tnp C·r~· ro (."".~""''''''' ··--r- ~I' \.. ~ '-',. 'Vi/,_,., ' __ ..... <.l,"":~' t'''.) r~"-..JI::J I'Y 
p_)..=,c.., ".,; '-l"~-'~·~ "''1. t_,·· ~t~<!>,-:(! lJC)'-'q ~ ~ r'1 
" ; ttl. r- " r._ 1.-,"' ,:. '-;""'" ,r-n rIp "3J r , _ " _ .~ ,. • .; ,_ \~..' . 'J ... ~ ,.' 
;l~-: ".! S T r 2 c::" -",' ~,. C ("_(11 ;'J.'! S;~d. 
:~ • ..., t'·":.r~"' ~_'l~',cl a'e] (:':' r'! r."l r')rT; "',, 
r" "r P 'r: 'i""'{) 'il::,!,",t --:.,-, •• .-.t .... (. tr- ·h"". ...., ,_ '" n .' ,. ; 4; t_- • 
. , C.J •• ,-_'.-, •... ::~ .. , . . ',' ',,', I,..... ' l. __ '" .~, . 8',' _r, 
E.PA Registration "Jo 91,)-72 
LeN: 72-173 
FARMERS UNION CENTRAL EXCHANGE, INC.t S1. Paul. Minnesota 55165 
~-
1 
Co-op 334 Ester IS a Butyl Ester form 
recommended as a selective spray in I 
and susceptible species treated befof! 
r. f growth for 2 4 D Irr'<ltment and for 
kl'O 10 ~,II pasture ilnd roadSide wee 
Lrj(>f Very Dry C,Jr(jI~!(wc, Ho .. ,e,er 
Directions 
How To Us.: t.-1IX w,th Willer for use ir 
water for ,wplane sprJyers t:,~1 sprayl 
Ester and fill tank \'"If; water and mix 
f'llxlure thruugh the spray pump and t 
while spraying If nmtt;re IS allO'Ned II 
uniform emulSion IS formed If sprayer 
recommended amount of CO-OP 334 
spray tank Apply the spray evenly to 
Quantity to Use: ,~ccordl'lg to the we 
use between 1/3 pint and 2 quarts CO, 
When To Use: Mosl effective kill resu 
Pre-emergence trealments wlil kill ce 
pigeon grass (foxtail). 
Uses and Partial List of Weedl 
Wheat. BICI". Rye: Treat when the I 
inches tall) Use I/} to 2/3 pmt of CO-C 
bindweed blue lettuce. cocklebur, F 
fireweed) lamb'S-Quarters marsheldl 
Russian thistle. sunflower, yellow roc 
volume of spray to control perennial; 
leafy spurge RUSSian knapweed. skel 
Do not sprav grain m 'boot" or "bloo 
dam,'qe tr crOD Do nat use on grain 
to the legume can be tolerated 
A pre-har/est ilDDl-ciltior of 3:. pint ~ 
ta!1 weens 3S ar 3,d ~o crOi1 har'/estm 
'w:)IICaIL'~ 10 :. :0stOCK ~o not oraze 
:.,th:n :' wel'Ks 3fier 2.4-0 aDP!icatior 
Corn; Pre-Emergence: SprilY :hp so 
tJ~: :_ef(,'0 errerger,ce Use 1 to 2 qu 
n:-. '"T' ....... -' 'Jrc.· .. :nq (':Jnd1f;ons are des 
3"": r ";~J'r:'lblp b'oadleaf annval Iii. 
,,,r(";:~-r0"~ed ()'1 "a"cjy ur '/cry dry 
Post-Emergence: -;- 1,' ?1 C~il','~ ilfter 
for sr,ra t, .. ':; !u c·~)r' r, corl,..,;eb0i mOl 
r~ c'''.:' PS U'-:'P 1._ ~~~ ) "< tJlr~ CO OP 331 
ar,j s( .v thistle J;ld S:P1 1 J .. SrJPc,es c 
. r t;j" (, r' U a h '.. ,. CC' l" ) '" d r L" 0'" ( ~ ,~' ........ h •. , ,\..J , 
anri ~('("l;l I! elf' 1" :'VI~,q rOlnt of ~::r)~n 
At La,-By Time:\rr\ 1 Oc)drl 0' CO 
1ro~s, . to ~or :~CJ! latp (,~~ ,('''GI~q 'l;ee, 
sq U 3 re I'lC h 
Pa"fM'I and 9rass Cro,s: Us·, 1 ql 
frcrrl tl 'rr :~) Loot st(lrnr(l~t In earl 
.. 'r"s!,.,,, to (rnlrnl b'w1nc~ !.lnnpll 
:"l('r"'l ·.-Jf'f'n r)o\/('rf)".Vf'(lr~ ~-'Z1nt,lln bl 
buffalo bUSh. qreasewood rOlson oa 
, ,.,1], ,:,(.rl.", ~~,.!t 1'1 r-,~,'(''"': nf HI 
! .'; l' 
'. , 
See Us' 
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, 1, ., 
J 
~caut;ons 1)1'1 Side

:»TED 
IL INS;::CTlClDE 
DI:NTk-,m: ACl 
SON REGISTE!, 
!"'--Z2 
3allon 
51.0% 
49,0% 
.100.0% 
)0 3' 30ga!lon. 
Children 
:litional cautions 
co-op 
334 Ester 
Weed Killer 
Woody Plant Control in Grass Pa.ture. and 
fene., RQW': Use 2 to 4 cuarts-oTCO-OP 334 
Ester to 100 9a110('1$ ':,atel dS a spray to the 
fOllac;e stems and trunks (f susceptible plant~ 
prefe-ably In the spr!f"lg alto;r maXlml~m foliage 
cieve!')pment This may recUire up to 400 
gallo'ls of spray per acre cependlng on brush 
helgr! and denSity Alder. ~Iderberry. eotton­
~od ~aze-, !o_~t. sl,l!11.9<2 \'0?~ra.l')e ar,d 
I~")se listed abr)Ve :mder Pastures are suscepti­
b,e For more resislart species and stands of "t­
j""1'~er brush which Includf' berry belshes and 
wl.ld~ose use a m.xture of equal parts of 
CO-C'P 334 Ester and 2.4.5· T at 'he rate of 2 
to 4 quarts ot. the r"lxture [leo 1 ej'J gailons of 
,','ilter Wet ill! fol.age thore J<Jhly 
1'''C_lll surfaces of stu~s 0' trees and ''II! 
br-.;o,'1 rnill be treated with 'he mixture (e:~'.,c-: 
:'3'!S r' CO-OP 33·\ Es~er and? 4.5-TI at the 
'Ci!'" cf 1 p,nt ''I 2 galic~s :1 eee! f~I'?1 to :;re'JenJ 
r8-c·c:.tr, Wet the enl re ~v:a:-·: . 'oroughly. 
')IJ'.,"J 'he \\·,,"Ier ner'llanc" S:-:lS:~" thf> hilSil: 
~ jf, O,ytlon 'Jf t'ees a'1j t'i;sh. less than 6 
'cr.es .'1 d a'~e'f" '~'i.' be treatee: uSing 1 pint 
.. , ~f-,<- rr >L'e :eJl,]' :Jar's )f CO·OP 334 Ester 
.3":-: :c j 5- T I 'r 2 ~a"ons :' d,ese; fuel Spray 
~. t- ent,re b:tsa l area 3t 9fl __ j'"'] I'np complCle!y 
(_'or ~ r: "~',! ~hC D:ar ! [.!nj ':'f·~.r'lg +.) the Do!nt of 
r .• "_ jOf Cottor;'I· .. c~,j ,lrd \',~ _I:).', 'na'r be c()n~ 
!, 'r': .. ,,1>-· CO-0P 3<·: Es'~' Otserve illl 
'-l: /'(lflS drl(l jl,.~~ct:()r"s f ' ~.':.{) cr l(lbei,~(] (If 
a' or l )' j:~., L;~ej ~n r.'~.!rJr ~~ 
E.P.A Registration No. 912-72 
LCN: 72-173 
tXNGE, INC., 8t. Paul, Minnesota 5516f1 
• 
CO-OP 334 Ester IS a Butyl Este. formulalion of 2.4-D. It is especially 
recommended as a selective spray in crops to control relatively tolerant weeds. 
and susceptible spec ips treated before or alter the o~timum susceptible stage 
(" growth for? .1 D tre:lt'1:l-': and for the control of certain woody growth. 
11a'd-to-",11 0ilS',,"-' :1"~ 'c .Hls.d," weeds CO-OP 334 Ester .s also effective 
urcP' Very [j', C::J~'l ~,~,~:: However Maximum Dosages Should Be Used 
Directions 
How To U.e: M,x '.'v.th water for use In ground sprayers and with diesel 011 or 
wa~er for alfJ,Jlane sprayers F.~I sprayer tank '/~ fL11 of water add CO-OP 334 
Ester and fill tank wltr. water dna mix thoroughly by agitation or clfculatinq 'he 
m.xture through the spray pump and back Into the tank. Agitate the mixture 
wh.le spraying. 11 mixture 15 allowed to star,{J. re-<..gitate before use until a 
uniform emulSIOn is hrmed 11 sprayer delivers 5 gallons spray per acre. add the 
recommended amount of CO-OP 334 Ester per each 5 gallons wate~ in the 
spray tank. Apply the spray evenly to reach the leaves of the weee's. 
Quantity to U.e: According to the weed problem and the tolerance of the crop 
use between '/J pint and 2 quarts CO-OP ::134 Ester per acre 
When To U.e: Most effective kill results when weeds are actively growing 
Pre-emergence treatments Will kill certain susceptlb;e broad-leaf weeds and 
pigeon grass (foxtail). 
Uses and Partial Ust of Weeds Controlled 
Wheat, B.eley. Rye: Treat when the grain is in the' fully tillered" stage (4 to 6 
inches tall). Use Y2 to 2/J pint of CO-OP 334 Ester per acre. to control 
bindweed. blue lettuce. cocklebur. Frenchweed (fc!nweed). kochia (lv1exican 
fireweed) lamb'S-Quarters. marshelder. morning glory. mustards. ragweed. 
liussian thistle. sunflower. yellow rocket and similar species Apply double the 
volume of spray to control perennial weeds such as Canada thlst'e. sow thistle. 
leafy spurge. Russian knapweed skelelon weed. white-top. and corn gromwel: 
Do not spray orain In "boot" or "bloom" stage T'Ils high rate may :,"use some 
damage to crop Do not use on grain Irterplar.ted '.'11th a legume. unless injury 
to the legume' can be tolerated 
A pre-harvest appl;Ciltior, of ]'4 pint per ;J~'~ rrilV be mace to remove certain 
tall weedS as ar aid to cro;J har'Jestlng Do at f~ed straw from thiS 'ate 
a(1r'llcation to iivestock ~o not gra7" cr harve,: fer forage treate1j gra.n j'elds 
Within 2 we'eks after 2.4-1) applica1,on 
Corn; Pre-Emergence: Spray the SOil surface' "l tn ') days afUr p'ant'ng corn 
but before emergence Use 1 to 2 quarts in 10 gallo,lS ',vater per acre. 
Opt.mum gro',v:ng conditions are desirable Controls pigeon and foxtail graS5"5 
and susc:"ptlble broad!eaf j3fjnl,.lal. w~ds Pre-emergence treaunent IS not 
recornmencied on sandy or very dry soils 
Post-Emergence: 7 to 21 days after corr !e3'/"5 ;,n',:cj IS 'Tlr'st dCS·rClt:.'.-' .. 
for sora'vl~g to C(Jr'IO! cock'ebur mornlnu g:O', 'ScJr,c'.:'.'IHS a'lrj """:'1' 
srleCles Use "c tc; 2, pint CO-OP 334 Ester per ;J':'" For c,,)ntrol of Carl ilcj1 
and sow thistle ilrd s:rn,:ar species ilPrlv 1 U 1'.' P''its Der ilue .'Ih(:n r:-"rr 
IS tall enough to else "b00rn drops" on t:-Jc spra;p, t'J dlf'?ct spra·,-·n. ,',( "d'; 
and keept off q'O'.vl'iQ pOi'lt of ";Oln Do ret apply frr'rn ~a'3sel t cl'uah ~t:-l":(> 
At Lay-Sy Time: Apply 1 a:Jart 0' CO-CIP lJ-l Es!"r ppr ,Fr,? u~,"g . b'J0n , 
~"ops." to cr'tf'trol l:1t~~} (.rr,t.;rglr:g .'.IP0'~(~ US('} tJ~'SS!j"0S ~O hi .10 [)nUrrlS per 
square Inch 
P"",!Af and 9.rass cro,s: U'." 1::.:1rt eel ()P :n·l Est"r ppr arrp Arcply 
from t,,!pr t:J boot staqe'e'll 1'1 P'lrIV r':'lr'lP' r~ur!nq PE"10d : f ,,00'1 ~o,' 
nlnlsture to rontrol bur-jo',,¥ '~:l'l,l":',,~ 'j.J",,\,·(·rl q( dIs l;Plr1 larkspur 
I')CO wpcr1 rov"rtywppej plilnlain h'.I' ~t,,·,r,h I ,nllnOI big ~,il'l(' silnrl "ag': 
buffalo bush. greasewood. pOison oak. pOison IVy Willow. w"d I,coflce. ana 
';tn-lil;}r r:r't'(,,(.l; ~rf>;11 :)il !(l~p-.(', (If N()(Hiy '1f,-,.:H) fnr r,;ltl~f;.,\1nry rfJnhr:d r{ ,r 
.~,,::r~ r:.1r" (I'r"r ! ":',"1' !~jf""'l '~I",JV ."I·th 1 fl'j,·,fr, (,f:-:n ()r '1:1.1 f ';tflf fl P' ,lr '{~ 
... 
See Us' 9cautions fJ~ Side Panel

• 
'J 
,) 
" 
CO-,-,P 
334 Ester 
Weed Killer 
u •• PnHUluUona 
- - ---- -,-------------
00 nol app1r co-op 334 Ester dJredly 10. or 
othervm:.e permit It to come In (.entact with 
vegetables. flowers, grapes. fruit trees, orna­
mentals, conon or other deSirable plants v/hich 
are senslli'ie 10 2.~·O and similar materials. and 
do not pennit sprtr mist Containing jf 10 drift 
onto them. $Ir_ce ~~en mln~te 'QuanMIe$ of ,he 
spray may CaUs.e 5c'/crc U'llury during both 
growing and dori~ant penods. (Coarse sprays 
arc less likely to df\.h ) ACcordingly. applica­
tIons by airplane. ~~ound rigs, and hand chs~ 
per.-sefs should be 1.;1In1OO out only when there 
is no hazard from dri'l 00 not apply by airplane 
in the vlcmttv C"~ c<?~on. grapes, or oth,~r 
deSirable ~.4·L) SJ,sceptlble vegetation. Since 
vapors of the n''''{er contained In CO-OP 334 
Est€»' may Injure suscep1ibte plams in the 
vlClOlly of application. use ooly where there is 
no hazard IrOR' such vaporizalron. Do pot apply 
to newly seeded turf 
Mosllegumes are usually damaged Ot killed. 
00 not contaminate IIrlgaborl dItches or water 
used for domestic PlJrposes Eltcessive amounts 
of 2.4-dlchlorophenollyacel,c acid In the soil 
may temporarly mhlM seed genninallOn or 
plant growth. 00 not store near fertilizers. 
seeds. insectiCides, or fllnglcides. 
To avoid JOJuf)' to desirable p"lanfs, do not store, 
handle Of appiy other agricultural chemicals 
With the same containers Or equipment used for 
CO-OP 334 e:s.~r. 00 not store near tert,hZef$, 
seeds, Insecticides or flJ'lQlcides 
ACCEPTED 
I WIDER ym: FTDF.RA L mSretlClDt 
) rU~GIClDr. ;'Nr. HODF.NT'CJOE ACt 
CO _ 0 P I-~!~~~~~~gc~ "2~~ 8£~t£a 
334 Ester 
Weed Killer 
Contains Butyl Ester of 2,4-0 
Acid Equivalent: 3Y~ Pounds Per Gallon 
Active Ingredient: 
2.4-DichlorOPhenoxyacefic acid. Dutyl esters. . . . . . . .. 51,00/0 
Inert 'ngredients ........ , ................ , . . . • . . .. 49.00/0 
Total. ........................... , ........... 100.00/0 
2.4.Dlchlorophenoxyacetic acid equivalent: 40.7%. 3V. Ib Igallon. 
(/ 
co-
334 
Weed 
Wood,PI 
...... 
Ester to l' 
foliage. ~' 
plefe!"8b , 
devel'Jpn 
gallons O! 
height aI' I 
WOOd, ~-.'.!: 
tllose hs!e 
bla, For r 
mixed bT~ 
Vlild r<!~e 
CO·OP;'.-
104 quar:s 
water We 
The ... ul !,._ 
brush rna .. 
parts o~ ( 
rate cf 1 I 
re-grOW!h 
This product ·5 !O);IC to fish. Keep out of lekes, 
streams and pond5. Do not use where run-off is 
like!.,. to occur 00 nol applV \ .. hen weath!!r 
condltlO.,s t8,,'or drift hom areas treated Do not 
cOnlamln3te waler by cleanmg of equlp'11enf, 
or disposal 01 wastes Apply thIS product only 
as specilled on thiS label 
CAUTION: Keep Out of Reach of Children 
Ourin;) tt'l" 
bark yen· ' 
inches Ir. 1j 
of the rr, •. 
and 2.4.,: 
the ~ntuc' :: 
coc1rrlir.g ; 
,un-o·'.~ , 
trolled \'f.·" 
caull(,.,'i 
RIOsc equipment and contamers and diSpose 
of wasles by burying In non'crop areas away­
'rom water supp'les, Containers snou'd be , 
disposed of by punching holes In them and 
buryln, \\,'h w-?s1es Drums may be relurned 
') rnl:l· .J'a< Iql •• 
CAUTION 
May Cause Slon IrlllaliOn 
HSlmlul "S; .. al!o~'.ed 
A.v;;)ld Contact \"1\,, £')iE-s. SM.;n and Clo\hIllQ. 
Keep Oul Oilhe' reach 01 children. 
. -. 
" 
see side panel for additional CButions 
Net Contents .. -;''-. 
Manufac1ufed fa, 
all pr'H]': .. 
E.P.A R.o I 
LeN: 12·1 
FARMERS UNION CENTRAL EXCIIANGE.INC., Sf. Paul, Minnes 
.11' 18 
.~-~-.~ ---~~- .

PTED 
i /t1;(1 
., L Ulsr.cnctDE 
~-,J;Nl'ICIDE Act 
)Q!f pEGJSTE.o:t· 
~- ~ 
Gallon 
510· .. 
49.0% 
........ 1000% 
%" 3V3 Ib./gallon. " 
f Chlldre~ 
ddllional cautions 
-
co-op 
334 Ester 
Weed Killer 
Woody Plan. CorUtol in Gra .. Pasfure. and 
f.1JC9 hu: Use 2 to 4 cuartSof CO-OP 334 
Ester 10 100 gallons waler as a spray 10 the 
f~IJ3gel siems and trunks (' suscePllb!c plants. 
prefe'ably In the spring after maximum foliage 
dcvebpmenl. This may fecluiro up 10 400 
gallolls of spray per acre ceDcod!ng on brush 
j-\helgflt 8f"d density. Aldp.r, elderberry. CQUon-
': 'CiQQd. ~. I~. s~~£ wild g~¥8 and ~ 
. :tiOse IIsled above under Pastures are suscepli· 
'61e For more resis;ant species and stands of ,~ 
mixet' bnlsh which includc- berry bushes and 
w~e. esc a mixture of cQuafpans o,f 
CO-CP 334 Esler and 2.4.5-T at the rate 012 
to 4 quarts of .the mixture per tOO ganons of 
waIN WeI at! f\lhage thorOJghly 
The ~ut s'urfa~cs 01 stun;'(!S of trees ana tad 
brusl": may he treated with 'he mi)(ture (em;c..! 
parts of CO-OP 134 Ester and 2.45-1) at tfle 
rate ct 1 pint In 2 gallor'ls d ('sel fuel. 10 preJent 
re-growth Wet the ent,re surface thoroughlv 
DurirtJ the \V.nter dOlmanc" season. tl'1e basal 
baric .::ort.on of trees and truSh, less than 6 
;ncttes in dIameter may be trea~ed uSlOg 1 pint 
of the mixture (equal parts :)f CO·Op 334 Ester 
and J' 4 I). n In 2 9:111ons 01 d!esel fuel. Spray 
It'O' r"'",! n='~.11 ')'('J .11 ('ir~Jnd hn(". complNely 
,", .~~ 'J II;~ plor,1 daJ wt 111119 10 the point 01 
run-a f ~oJlon\\'.ood 3ild w lIow may be call­
frol!eJ \'.ith CO·Oj' 334 Ester Observe all 
caut!cns and dlrcctior'ls tor use on labeling of 
all produC'ls used in mldur,~s 
E P_A Registration No. 912-72 
LeN:n-tn 
t: lANGE.IN~ .• SI. Paul. Minnesota 55165 1;-
... tI· 18 
l 
co-op 334 Ester is a Butyl Ester formulation 01 24·0 't is especially 
recommended as a selective spray in crops, to control relatively tolerant \ve.eds. 
and susceptible specIes treated before or after the o!ltimum susceptible stage 
of growth. for 2,4·0 Ireatment and for the control of certaIn woody growth, 
h'lrd-to-kd' pasture and r01dside weeds. CO-OP 334 Ester is also effective 
under Vcry Dry ConditiOns; However, Maximum Dosages Should Be Used, 
Directions 
How 70 UN: Mix with water for use in grou.,d sprayers and with diesel oil or 
water for airplane sprayers Fill sprayer tank \'3 full of waler. add CO-OP 334 
E~ler and fill tanle; with water and 1.lix thoroughly by agftahon Of circulating the 
mixture through ~he spray pump and back tnto ihe tank. Agitatp. tt" mixture 
while spraying "mixture is allo','ied to sland. re-agilalo before use until a 
uniform emulsion is formed If sprayer delivers 5 gallons spray per acre, add the 
recommended amount of CO-OP 334 Ester per each 5 gallons water in the.: 
spra{ tank. A~T'-' U-·.o spra., c',en!\, 'o reach the Icaves of Ihe \'.eeds. 
Qu.n"" 1o UN: At:'cO!dll'lg to the weed problem and the ,tolerance of the crop. 
I.~e bn.';Fpn I'J p,nl 31td 2 quarts CO-OP 334 Ester per acre. 
W"'" 70 Ute: Most effective kIll results when weeds are actively growing. 
Pre· emergence trei'ltrr~nts ..... :1 ;",11 eNtain susceptibte broad-leaf weeds and 
p::;J('on grass ffo'fla Il 
Uses and Parlla' Usf of Weeds Controlled 
Wf!Ut.IIIIlI7..1Jl!.: rreat when the 9r.un IS In the' fully tillered" stage (4 to 6 
Inches tall) Use \'1 to ~'3 pinl of CO·OP 334 Ester per acre. to control 
!>'ndweed. blue lenuce. cocklebur. Fr~!lclJ\~eed (fanweed). kocllia (Mexican 
flfeweed). lamb's-quarters. marshelder. mor~ing glory. -mustards. ragwe·ed. 
Russia.n_lhistle. sunt!ower, yellow rocket and similar species Apply double the 
volume of spray to control perennial weeds such as Canada thlslle, sow tf'listle, 
leafy sgurge. RUSSian knapweed, ssteleton weed, white-top, and ClJrn gromwell 
Cc nol spray grain In "boot" 01 "bloom" stage. Tnis high rate may cause- some 
darllage to crop 00 oot use on grain m!erplanted with a legume. unless inJury 
to the legume can be tOlerated. . '.\ 
A p,e-harvest aprhcatlor. of 3/ .. pint per acre may be made to remove cp.rtain 
lall weeds as an aId 1.) crop harJeslmg 00 not feed straw from this late 
8Dp'ICa1lO1'l to ';"''?stoC'o( D') rot r,:~:1ZP ('It haty('sl for lorag('o tu:'al('d grain fl("ltj:,;. 
\· .. ttU";' \",(,(-1. 0, afT"f ~ 4-1) .~rr' Cal'0" 
Com~pre-Emergence: Spray the 5011 surlacE.." 3 to 5 days after planting corn 
l2.ut fore emergence Use 1 to 2 quar1s in 10 gallons wate!: ~et.acre_ . 
Optimum growing cond!tions are deslfable ConUols p~eon and fOldall.9rasses 
a.,d susc~pf'b!e ~r!?ad~Ci1Lann!-:aLYie.e.as PIe· emergence 1r~at~ent is no.--­
tl;r:olT'f1:H1d"lj c,n !,'r"'~Y c~ '."''1 dry SOils 
Poaf-Emergence: 7 to 21 days after corn leait'''S unfold IS most deSirable time 
for sprayIng 10 control cock~eb'Jr. morning glory s~nfJo"/~rs and ~im,lar 
species Use ',z tl] ~!) p.nt CO-OP 334 Esler per acrc_ For control of Canada 
and sow ~hJstle and s,mliar spec!cs apply 1 to 1 V~ PlOts pcr acre when Cor:1 
is lall F:'nougtlto !.I,se "boom drops" on the spmyer to direct spr3) on '1 .. ceds 
nnd ~f'I.p .! o~ gro· .... ing pomt of corn 00 not app1i from tassel to dough stage 
( 
.'Lar~ lime: Appl) 1 quart of CO-OP 334 Esler pcr acre usmg . boom 
drop!='\ 10 COnlrollalc emergIng ileE'd'3 Use pressures 20 to 40 poul'1ds per 
! q,1 I'l' ",,:h 
ew"., •• nd.@!lUC't)2":U,,>~ 1 qutAt r.O-OP :l:,4 Esler per acre ,~pply 
r from Mler to bool sWge Trealln car.y SufT'mcr. ouring ~el.Qd '.Jf good SOil 
\ ) ml)llihlrp to r.onlrol bur.J'or.k dan1ej:on 9u~"',~cd <)o",,>-~r.d 13r~pur. 
,-, lalo 'Alect pov&rtyv;el"d, p'alJfain DUC"~~~ (yo)oll1g) b., slgc., s!l\dJ.lgc 
1 
nufalo ~Sh. gfeij!:e .. • .. C¥>d po;sQlt 0#. pqitan ~.." wtlll1/' witti hCO}'CC. and 
similar spe(I("~ freat A'II le,lJe! of ·.{OOdy groitth tor §"aMfac'ory (onlrol For 
\',_,ld gafl!S; conlroi In pa~lures 'Spray w.th 3 quart'3 of CO·OP 334 E!'.tcr per ao:rp. 
dUllng the bud to Ilo.'IN1flQ sta~(> and repeal the tleatmefit tn Sf'ptf!mbe, Do 
nol grate dairy tlnlm~is \'Ilth-n 7 days after treatrnenl Most le'1um('$ WIll bp 
damaged or k lied D() nol app:y 1('1 nr-,'.1y <;eeded liJrl or alk' b",~au;ll MglOS 
Do 'lot spr(l; Wh~'l ~:'ass IS fron lY 01 t( ITr·ik 'i!,::':J~ 
SeeU., ecaul/ons on Side Pan,' 1~ 
, \ , 
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