Vol. 16—1962 - NorthEastern Weed Science Society

114
weediOl of Sweec Corn With Chemical Band-cid ..
CharLe.'J. Noll 1
More than half, ot Jiaenll8y1vaD1a'. 24,000 acr .. of .wet corn are weeded
with chemicala. Mo.t 1arg. growr. lrowing for freah _rket us. ch.. ical '.
h.rbicides. A. th.r. i. no lack of good herbicides to weed corn, this experi·
lII8nt wa. deaipe4· to COIIIp8rethe bett.r known ch.. ica1. with tha newch.... &1.
thought to b. promi.inl for the weedinl of thi. crop.
The s•• dbed W8. prepared May 1.5. The pr.·p1anting tr.at1Mnta W8r.
applied just ahead ofs •• dingonMay 17 and incorpo ... ted in the .0U witb .•
rototUler .et.hallow. The vari.ty seeded was. 1tt.The pre· ... ra••• ··
tr.atments w.r. appli.d 2 days aft.r ••• ding. Th. "'1'1.nce tr.atm.nts ....
appU.d 17 day. aft.r seeding wh.n corn was in the .pik. stag.. Individual.
plots were 36 feet long and 3 feet wide. Treatment. were randomized in •• db,
of 6 block ••
The chemicala were applied with a small spra~l'ov.r the row for a width
of 12 inch... Cultivation controlled the weeds betw.nth. rows. An .stWet.
of we.d contro1wa. made July 24 on a bali. of 1 to.O, 1 being most d.sir~l.
and 10 being l .. at d.sirab1e. Corn vas harve.ted Aqu.t 23.
USULTS
Th. results ar. pr.sented in tab1. 1. All ch.. ica1s significant1y1Dcr.""9d
weed control a. compar.d to the untreated chacko Th. best weedCOlKro1
treatments were Atraz1ne, Herb. 326, Diruon .and Pa10D~ The .tand of p1anta w••
unaffected by ,the treatments. Only ~he Atra.tn. and: tPa 2,4·D treated. plot.
had dgn1ficantlymoremark.tabb 88;1 than the unt,...ted' ch.ck.,p10t. A
h:l.gblY·."pUle.at tacna •• in .. iglac o.f mazltetab1e ear., as cc.par.d to _
un,tr.ated check plot was 'ound wh.r. Atraz1ne, 2,4-1> &IMltha lower rate of·
Herb. 326 weI" appu'edat time of Co1'11elll8rpnc. and wh..... DNBPat 6 1ba•.
per acr. and RaD40xat 10 1bs. per acr. w.re appli.d priOr to corn emerpnc ••
Many other chemical. had .ignificant increaaea in welsht of marketab1 •• ar.
at the S%1ev.1 a. compar.d to the untreated check plot.
COHpLUSIQN
Many ch.. icala wh.n applied to corn gave good weed control, no Itand
reduction. and incr.a ••• in yi.ld~. compared to th.untr.ated. ch.ck plots.
Th. outstanding ch.. ical in thi,experiment va. Atraaina.
1 . . .,. , . .
A' sociate Prof.s.or of' 01erlcu1 ture, ~'Department of BoFticu1 ture, Coll.g.
of Agriculture and Bxperiment Sta.tioD, P8IlIlaylvanuoJtat.Univer.lty, Uni.,.reity
Park, Pennsylvanu. ..'
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