Vol. 15—1961 - NorthEastern Weed Science Society

97.
Weed counts were made 3 weeks after application. Unfortunately
severe frosts 10 days after the pre-emergence application troze
out the weed seedlings trom the untreated areas making comparisons
possible on only 1 ot the 5 farm sites. Even in these plots, weed
populations were extremely low. These results are shown in Table
III.
Table III
Weed Counts Following Pre-emergence Application*
LambsquartersSmartweed.
Barnyard
graBS
Randox T 6qts per A 1.5 2.0 II It II
9 1.0 1.5 II II It
12 .5 1.0 Randox T 42 -Lbs per A .5 .5 granules 63 II II II .5 0.0 II
84 " "
.5 .5 Randox(gran.) 30 lbs. per A .5 2.0 Randox 6 qts per A 2.5 2.0 o
untreated control 5.5 8.0 4
* average count 1.0 sq.tt.
Second applications were made on-June 7 and Bon threetarm sites.
Plants at this time were in the 3 to 4 leat stage. Prior to the
application, all plots were cultivated and hand weeded including
the untreated controls. Application rates wereidenttcal to the
tirst treatments. The sprays were directed to the base ot the
plants. Where accidental spray contSct on the leaves was made,
some burning was noted. Subsequent growth ot these injured plants
was not impaired and recovery appeared to be complete.
Weed populations were heavy in the untreated controls and most
treatments gave very etfective control as is shown in Table IV.