Vol. 15—1961 - NorthEastern Weed Science Society

314.
Table 2. Stand Counts and Sileae Yields from Spring Applications of Herbicides
for Q,uackgrass Control.
Treatment
No.
Average number ot
Quackgrass shoots, sq. tt.*
cultivated - not cultivated
Yield
Tons/A.
cultivated
of slleae coru
mmoisture**
...not cultivated
1 2.1 17·5 18·9 14·9
2 ,.0 8.4 21.2 16.2
; 2.; 7·0
18.0 18.7
4 1.4 5.0
19·' 21.4
5 1.0 2.6
16.2 14.2
6 2.0 LO 18·7 18.4
7 0.8 0·7 19·4 18.0
0·7 4.;
17·1 18.2
L7 ;.;
16·7 21.6
2.0 U.O
17·1 16.6
2.;
1
6.0
18.4 18.0
1.4 2.6
20.2 18.2
8
9
10
11
12
1;
14
0.8
14.4
;0.;
22.0
16·9
5·9
1;·9
2·9
*Average of ; - 2 sq. ft. quadrat counts per plot.
*"tAll plots corrected for stand. The yield is based on the same number of
plants per plot.
SUMMARY:
-
The combination at herb1ciees used in this study was the most promising
Quackgrass control treatments to be investigated over the past 10 years. The
combination of plow-down and pre - or post-emergence applications resulted in
very marked reductions in Qua.ckgras·s stands and provided seasonal control of a
Wide range of broad-leaved weeds and annual grass species.
~: A mimeographed copy of the complete paper is available from the author.