Vol. 15—1961 - NorthEastern Weed Science Society

was cODsistantly better than the lower rate in controlling
broad leaf weeds. (Table 1). The three pound rate plots, on
the other hand, produced a yield significantly better than the
control plots.. The plots, reeeivitlg the six pound rate produced
y1elds which were no~ significantly better than the plots
'¥here the three pound rate had been applied (Table 1).' The
·control of grasses was not as satisfactory at either rate as
the control of broadleaf- weeds,. Although there waa alight
da_ge to theaoybean plants at 'emergence with both rates the
damage did not affect the stand or yield.
Table 1. Aver .. e weed control ratings and yields of soybeans,
as affected by DNBP, at Newark and Georgetown.
Averages of ·three replications, 1956 - 1960.
Treatment
Broadlea!,
, Weeds .:J
Grasses 1/ ' Yield
. Su./A.
Control o o . 20.6
,Preme~ge (3'lbs.r 7.3 3.5 28.0
Premerge(6 lbs.) 8.8 6.0 30.2
" S1.Significance 2.9
1/ Weed control ratings (0 -no control, 10 • perfect
. control)
, Summary
Five years of tests and field observations throughout the
state of Delaware indicate that DNBPat the rate of 3 lbs./A.
is satisfactory for controlling broad leaf weeds in soybeans
where a mild infestation occurs. Where broadleaf weeds are a
, ~'a.vere.;problem 6 lhe. per acre iSlDOst satisfactory in con­
" trolling 'weeds. DNBPsold, under the trade names" of Premerge
and Sinox PI· is "probably the best answer presently to' our broadleaf·
,weed problem in soybeans. . ,
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