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Vol. 16—1962 - NorthEastern Weed Science Society

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Table 2. Effects of Herbicides on Quackgrass<br />

Treatments<br />

June 14<br />

. 'Fall -;;';S"'p'-r"-:i-n-g- Shoots<br />

Herbicide Herbicide per Per cen!<br />

-1.~8.--1A _ ~..J£. S9,ft. co,1trol Ra,ting 2<br />

<strong>Weed</strong>y Controls<br />

a o<br />

Simazine 3<br />

59 7.1<br />

Simazine 3<br />

90 9.1<br />

Simazine 3 Simazine 3 2.4 97 9.7<br />

Simazine 5<br />

92 8.2<br />

Simazine 5 Sin~zine 3<br />

97 9.8<br />

Atrazine 2<br />

10.9 $4 6.3<br />

Atrazine 2 Simazine 3<br />

92 9.4<br />

Atrazine 4<br />

l:-.5 94 8.6<br />

Atrazine 4 Simazine 3<br />

98 9.$<br />

Propazine 4<br />

$$<br />

Propazine l, Simazine 3<br />

95<br />

EPTC 5<br />

93<br />

EPTC 5 +<br />

Simazine 3 3,$ 95<br />

Amitrol 8<br />

26.3 61<br />

Amitrol 8 Simazine 3 10.5 $5<br />

Dalapon 10<br />

41.6 39<br />

Dalapon 10 Simazine 3 14,6 79 $.2<br />

L,S,D. p=;05<br />

7;7 11<br />

p=.Ol<br />

10,5 15<br />

0.9<br />

0.6<br />

1.6<br />

o<br />

5.8<br />

0.6<br />

1.1<br />

a<br />

0.7<br />

0.6<br />

6.3<br />

10.9<br />

1.7<br />

$.9<br />

3.0<br />

97<br />

98<br />

94<br />

100<br />

78<br />

98<br />

96<br />

100<br />

97<br />

98<br />

82<br />

77<br />

59<br />

94<br />

67<br />

89<br />

16<br />

21<br />

229<br />

Sept. _1_2 __<br />

Shoots<br />

per Per cen!<br />

so,ft. control<br />

26.8 o<br />

6.0 78<br />

- - - - - - - - _.-~. -- - - - - - - - - - - - ~- - - - - - - - - - -<br />

lper cent control based on shoots per sq.ft.<br />

2Visual rating: 0 - no control, 10 - 100 per cent control.

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