Vol. 16—1962 - NorthEastern Weed Science Society

185
S\:U!U!1fryand
ConclWtlon
No hel'blclde or COO1blll.'tlon of herblc.!des tested gave s1gnificantly
higher yields of K.tahdin' potato •• than the stand8!"d
treatment of 4.$ pounds DNSFper acre appo.i.ed at'emergenoe.
Herbicides that did not diffeZ' s1gniUoantly in etfecton
yIeld from 4.$ pounds DNBP included planting applications ot'3
pounds Trietazine, 4 pounds Prometryne, 6 and 9 pounds Niagara 5778,
4 pounds AtrametZ'yne and emeZ'gence application of 4 and 6 pounds
Solan, 2 and 4 pounds Prometryne, 2, 3,4, '$ pounds Dupont lZ~, , ,
3,~6, 9 pounds Niagara $778, and 4 pounds A~!"ametryne.
Combinations of her bIoi des that did ni5tCiHfer sigriitioiiDtly
in effec t ,on yield from 4.$; pounds DNBP,inoluded emergenoe applioations
ot m1xtUl'es of Duponlf')26 and' Frome'~!"tne or Diphena1l11d-or
Atrametpyne or Zyt!"otl or Tll'1etazine, mi:lct~s, of DNBPand ,A,b-rjllI1etryne.
or Zytron or Diphenall1id or Dalapon or Proll1etryne or
Trietazine or DiUl'on, and mlxAiures Solen &I!ld'Diph41A#imidor Trlet$1"
zine.
Yields and annual wee,d pootrol tended\to be signifioantly lower
when heavy rains fpllowed ,pplloation.
Herbloidee giving slgnj,t~cantly lowe~:;a~ue.l broadleaf weed
control than 4.$ pounds ])NBP'wp.en heavyrs~s' did npt follow applios
tion inClllded, ,emergence ~PP1,".Lea tionOf, 4,po,~ds Falone and planting
applioation of 1 pound Pllsoron, 2 and 't pounds Diphenall1id, and
2 pounds Prom~tryne. Herbl~~des giving signifioantly lower annual
broadleat weeQ.control whe~.nelivy rains followed applioation included
plaritingapplica tionof 3 pounds FrPJ!l.etryne ,-a mixture Qf 8
pounds NiagaI'a $778 and 10 pounds Zytron, ) pounds Atrametryne, 1
pound Casoron. 8 pounds Niagara $778, 2 pounds Diphenamid, and 10
'pounds Zytron. ---- ,--" . '
He rbioides giVing signifioantly highe!!, annual grass oootI'ol
than 4.5 pounds DNBPwhen heavy rains did not follow applioation
included planting appllcatiQq of 2 pounds ~ipb.enamid, 2 or 4 po~ds
Prometryne, ,.~, and 4 pounds.'\t,Pametryne. -4,tJ1d 6 pounde Solan, ar..d
2, 3, 4. and $ pounds Dupont 326. H~rbioi~@s giving sign1fi~,ntly
higher annual grass contrbl than 4.5 pounds DNBPwhen heavy I'ains
followedal?R+:lrcation included e,lI1~J:'genoesp.p.1-1(lat1on of 3 pounds
Dupont 326,.l1liXtUl'es of Dupont 326 and A-:t"Ill8~l:'yne or Diphencdd 01'
Prometryne ,o~ZytI'on or TI'iee~azine and amix,ture of DNBP and
Atrametryne. ' , , "
The most promising new ,herbioides tes~.d in 1961 are Dllpont
326 for either planting or emeI'gence application and Solan for
either emerg~oe or earlYP~l!I,t-emergenoe application.