Vol. 15—1961 - NorthEastern Weed Science Society

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Table 1.
Weed Control Ratings. and Yields of Corn as Affected by Spray and Granular
Forms of Certain Herbicldes at Newark and GeorgetQWn,,Delaware, 1960.
Treatment,. Rate , Btoadl".£ Ratings
Jd,D.e29 Sept. 20
Newark . Newark
1/
June ?8
Geo;getown.·,
Grass
June ~9'
'·Newark
.
Rati~S 1/
Sept. o June 28
NeWark 'GeQ~getown'
Yield
BU.t«.
Newark
2~4-Dest,r 1/2 0.0 3 .... 3 :(S)
1 0.:0 3.7 (S)
.,.
2,4-Dgranuiar 1/2'6.3 6.7.'(S)
\: 17.0 5.0 (S).
2.3'
3.3
0.0
0.3
0.0
0.0
1.3
4.3'
1.7
1.1
2.7
3.7
0.0
Q.O
0.'0
0.3
38.2
, 49.5
57.6
66.5
COAA: 4 3.3 4.0 .
8 6.4 4.7
0.3
0.3
3.0
7.0
7.7
3.7
0.3
0.3
60.6
79.4
CnAA grantil.X', 4 . 2•.7, 1.3 (S)
8 3.3 . 2.0 (S)
2.0
3.0
2.7
3.3
3.7
4.7
2.3
3.3
57.3
71.2
cJiAA-T 4 10.0 8.3
8 '10.0 9.3
9.1
10.0
1.3
8.7
4.3
5,.3
3.3 .
-5.7'
66.7
73.2
CDAA-Tgranular 4 10.04.7
8 10.0 (S)6~7 (5)
Atrazine' 2 ro.o 5.7
4 10.0 7.0
5.0
6.1
10.0
10.0
10.0
10.0
9.0
10.0
6.3
1.3
7.0
7.7
1.7
3.0
a.o
9.7
74.9
80.5
85.6
83.2
Control --- 0.0 0.0
Significance - .05
.._----......_-..
1/ 0'= no control, 10 = perfect control
(5) = stunting of corn
0.0
0.0
0.0
0.0
.', '23.2
.
l\)
\J.)
31.4 -..0