Vol. 16—1962 - NorthEastern Weed Science Society

102
because past weather reco:l\ds indicated that these two lbcations generally have
very different cl:1mstic conditions. .
General
Standard Chemical, Rate, Mixture and Timing Tests.
IdenticaJ. .teats were conducted at Oswego and Elba. locations in growers'
fields. IrIdi vidual plots were 5x20 feet haVing four rQVlI of' onions lengthw1M
in each plot. In Table 1 are presented a list of trea1llllents, rates and t1lll1Dc.
!a~l! h._ [~2.f_c~ic!,l!,_r!.t!._an~ !1l!i~~ .., _.., ..,.__
_ _ _ _ _M!,t!r!8!,s_U!.~ T!1II!.2.f_al?\'hi~a112.n ... .;.'_
Chemical
CDAA
CDEC
eIPO
CDAA+ TCBC
CDEC+ CDAA
CDEC+ CDAA
fI
It
"
"
CDAA+.CIPC
4,6
4,6
4,6
4,6·
3+3
4+4­
4+2
2+4
6+4
6+6
"", '
. Oswego
~-MsiV 1, 2 days after planting
~-May 15, onions
in crook
~-May 18, lO-2~ onions in flag 8'tqe
tI "
1st MsiV.8, sailleday as planted
2nd MsiV17, onions in early crook
_________ .... 3rd~_2i,...,..0~11! !nJ!.Bi _' _
*rates .based on quantity of CDAAapplied. (solldasRaMo~..T)
. Each plot 'Wasreplicated three times with the chea1cal treatments randQm1zed
in each replicate. The timing factor for each chemical. treatment, however, was.
not randomized, so that the three times of application: were side by side in ..
pre-set order. The t1m1ng f'actor,tben, is composed ottbne sUb-plots in 'bhe
main plot which is the chemical treatmeJ1't. There was a. check plot in each tier
of each· replicate.
Although each treatment was applied at three differeJ1't times in relation to
onion development, it must be stressed that each plot was treated only once, ...
that is, different plots were treated at each of the three t1m1ngs.
All chemicals used were the c01lllllercial liquid fol'lllUlations and all combinations
were tank mixed. Applications were made with a hand CO2pressure small
plot sprayer. . .
Visual weed and crop ratings were made· in each location throughout the· .
season •. At OSYeSoall plots were hand'weeded on July 5th and weights of weeds
were taken. Yields and stand couJ1'ts.vere taken in September at time of bar'leet.
Stand couJ1'ts and field records were taken on the 15 feet of the middle two ron
in each plot.