Vol. 16—1962 - NorthEastern Weed Science Society

268
of the above pl\;lllsj exce1:ltTteatnlerrt' 8,_rell1v.n,,~jl"5';''POund applicati01l.(
of Sitllll.z1nein 'June or July . ''S1maztne"inJury WU' IIIOre-Prevalent in '
Treatment 6- fl1iIAn:iaTre&tment9~:'l!t 'Be_as tllWlb':e1ther the .KarsH '
following th6' Siazineappl1cation"1ntensified the~tof injury, or the
Dactha~ 8.4'Pl1ed" .1;he·.._t1me)·_W'~ased the ,BIlO'lilt.o.t.c1l.lQ~sis .No .
chlorosis was found in any of the subplots reee1v~iPIlly" the J~e or July
application of Simazine.' "
Plarl.ts,~8~plots~ceiving ~ add1tiOnal2.~und application of
Casoron (TJ;U:tlI!l'Dt3) on September 29,had many re,~sh.purple leaves,
whereas those in the II un,treated" s~plot were no~,,',' ,.,in cOlo,r,,' Most of the
plants were killed in tbesubplots-,w!th a total 1;>1: ~,pounds of Casoron, lllld
very few runner plants survived in'\ltie 4-pound s~p~ts. r
Berry set and size were similar ,in all treatme~~ except Treatments'
1, 3, a.nd4.Altbpugh it.was not po!Ssible to obte.:i~/yieldrecords in e~h
of the 108 subplots, there is no doubt that yields were decreased in '
Tres,tments 1, 3, "and 4. In SOllIe "ot the other treatments increased berry - .
size tended' to ottset any' decreases in berry' n~eili, "80 large yield
differences' wrenOt apparent.' " uc ,', ,
The strSwberryplarit~g Was"no~ weeded at eiij"'1fJfte'1n1961 (the oD'J.i;'
hand-weeding ~1~ donepr:tQrt.Q.~~ 19, 1960 0tli~ 'the Augwst ~~"~
September 8, 1960period wbena11 'lieeds were remoY~ M'Wei8h1ng). On'"
october 24, 1961, ·the per cent Clf':~~d control: "~~'ted for each plo~.
At 1:histime some plots were stIllalJllost completeJ.li:~-ttee. The ."
average per cent of weed control is pl'esented in Table 2. The percent.s
were transformed to angles, and the statistical analysis made. The
comparisons among means showed no differences between Treatments 2, 5, 6,
7, 8, and 9 although the average per cent weed control: varied from 70 to 88
per cent. Wee413OBtrol:was .18Bi1'f!eantlypOo1'er1ujTN~ts 3 and Itban
in all othftttell.tlient8, except ~atmEint4. Th& dIl1Y'major shift in'd!t'gree .
of weed col.'l.'ttOlf1'Olll19&:>to 19'61oacurred'W1thT*1iIIient 9.