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Effect of Time of Application of Diphenamid on Pepper, Weeds, and Disease

Published online by Cambridge University Press:  12 June 2017

Y. Eshel  and
J. Katan
Y. Eshel
Affiliation:
Dep. of Field and Veg. Crops and Dep. of Plant Pathol., Hebrew Univ. of Jerusalem, Faculty of Agr., Rehovot, Israel
J. Katan
Affiliation:
Microbiol., Hebrew Univ. of Jerusalem, Faculty of Agr., Rehovot, Israel
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Abstract

The effect of timing of preemergence application of N,N-dimethyl-2,2-diphenylacetamide (diphenamid) on phytotoxicity to pepper (Capsicum annuum L.), efficacy of weed control, and damping-off incidence was studied in greenhouse and field experiments. Delay of application from day of sowing to close to emergence reduced phytotoxicity to pepper while only partially reducing herbicidal action. Addition of a mixture of the contact nonresidual herbicides 6,7-dihydrodipyrido[1,2-a:2′,1′-c]pyrazinediium ion (diquat) and 1,1′-dimethyl-4-4′-bipyridinium ion (paraquat) to a late preemergence application of diphenamid resulted in control of weed seedlings which emerged after sowing of pepper and significantly increased the yield. The increase of Rhizoctonia damping-off incidence due to diphenamid was also reduced by delayed application.

Type
Research Article
Information
Weed Science , Volume 20 , Issue 5 , September 1972 , pp. 468 - 471
Copyright
Copyright © Weed Science Society of America 

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References

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