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Vol. 15—1961 - NorthEastern Weed Science Society

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· 109.<br />

Table 2. The influence of delayed planting on crop response to several<br />

chemicals<br />

Weeks<br />

Crop ResponseY'<br />

Chemical Lbs. Elapsed Spinach Cabtge Lettuce Carrots Tomatoes<br />

1. EPTC 2 (gran.) 0 1.0 2.0 1.5 3.5 2.0<br />

1 1.0 2.0 1..0 3.5<br />

2 1.0 9.0 8.5 9.0 7.5<br />

2. EPTC 4'(gran) 0 1.0 1.0 1.0 2.5 1.0<br />

1 1.0' 1.5 1.5 '·3.0 ' 3.0<br />

, : I<br />

2 ,;5' 7., 6.0 7.0 4.5<br />

3. Stauffer 2 (gran) 0 '7.0 1.0 1., 4.5 8.0<br />

2061 1 7.0 1.0 2.2 4.0 8.5<br />

2 7.5 8.0 8.0 9.0 9.0<br />

I.,<br />

4. Stauffer 4 (gran) 0 1.0 1.0 1.0 2., 1.0<br />

2061 1 5.5 1.0 3.5 8.0<br />

,.<br />

2 5S 5., 3.5 7.0 8.0<br />

Niagara 2 0 1.0 1.0 1.0 1.0 1.0<br />

5996 1 1.0 1.0 1.0 1.0 1.0<br />

2 1.0 1.0 1.0 1.0 1.0<br />

- 6. Niagara 4 0 1.0 1.0 1.0 1.0 1.0<br />

,996 1 1.0 1.0 1.0 1.0 1.0<br />

2 1.0 1.0 1.0 1.0 1.0<br />

7. Hercules 1 0 1.0 1.0 1.0 1., 1.0<br />

7175 1 1.0 1.0 1.0 1.0 1.0<br />

2 2.0 1.0 1.0 1.0 1.0<br />

8. Check* 7.0 8.0 7.0 7.0 7.,<br />

'.'<br />

1/ Crop response of 9 = perfect growth; 7 • acceptable; , = stunting; 1 a kill.<br />

* Check plot crops were somewhat stunted due to weed competition.<br />

All chemical treatment s gave good to excellent weed control

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