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Factors Affecting Bentazon Toxicity to Cucumber (Cucumis sativus)

Published online by Cambridge University Press:  12 June 2017

John R. Teasdale
John R. Teasdale*
Affiliation:
U.S. Dep. Agric., Agric. Res. Serv., Beltsville, MD 20705
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Abstract

In three field experiments with weed-free plots, delaying the application of bentazon [3-isopropyl-1H-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxide] reduced toxicity to cucumbers (Cucumis sativus L. ‘Poinsett 76′). Maximum injury and yield reduction were observed when bentazon was applied at the first leaf stage, whereas injury and yield reduction were slight when bentazon was applied at the fourth leaf stage. Increasing illuminance after application increased injury and tended to override the effect of leaf stage. In greenhouse studies, the slicing variety ‘Poinsett 76’ was more tolerant of bentazon than the pickling variety ‘Calypso’. The insecticide diazinon [O,O-diethyl-O-(2-isopropyl-6-methyl-4-pyrimidinyl)phosphorothioate] increased bentazon toxicity to cucumbers compared to toxicity caused by bentazon alone. Four other insecticides and two fungicides had no effect on phytotoxicity.

Keywords

Leaf stagelightplant varietydiazinon
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 32 , Issue 1 , January 1984 , pp. 33 - 36
Copyright
Copyright © 1984 by the Weed Science Society of America 

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References

Literature Cited

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