Vol. 16—1962 - NorthEastern Weed Science Society

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Tomato Yields (Tons/Acre)
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Fie~d-Seeded . Transplants
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Table 5. Yield Data on Field-Seeded and'T~ansplant Tomatoes
Diphenamid
__ l~/~ _
Wettable
Powder
2 19.5
4 18.8
6 19.6
8 18.7
o 16.7
15.8
20.0
20.4
20.0
57
In five trials on seeded and transplant green peppers, diphenamid
gave no damage to peppers with comparable weed control to that
obtained in tomatoes.
In experiments on first-year transplant and established strawberries,
diphenamid has given good weed contr()l with no damage
to the strawberries at rates. through eight pounds per acre. Above
eight pounds s ome le.afburnand decreased runner production was
noted.
Table 6 presents data from a typical experiment on first-year
transplants. Diphenamid was applied two days after the berries
were set. The dominant grass weed was large crabgrass. Lambsquarters
and velvetleaf were the dominant broadleaf weeds. Tpe
latter species is tolerant to diphenamid as i.ndicated in Table 2.
In several experiments on transplant strawberries the plots
were placed under cultivation after the first weed control data
were obtained. Subsequent observations indicated that shallow
cultivation did not destroy the weed control effectiveness of
diphenamid.