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Selectivity of Diphenyl Ether Herbicides between Tomato (Lycopersicon esculentum) and Eastern Black Nightshade (Solanum ptycanthum)

Published online by Cambridge University Press:  12 June 2017

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

A non-linear dose-response model was used to analyze the response of tomato (Lycopersicon esculentum Mill.) and eastern black nightshade (Solanum ptycanthum Dun. #3 SOLPT) to acifluorfen {5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoic acid}, fluoroglycofen {carboxymethyl 5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoate}, fomesafen {5-[2-chloro-4-(trifluoromethyl)phenoxy]-N-(methylsulfonyl)-2-nitrobenzamide}, and lactofen {(±)-2-ethoxy-1-methyl-2-oxoethyl 5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoate}. The relative potency of these herbicides to both species was lactofen > fluoroglycofen > fomesafen > acifluorfen. Tomato was significantly more resistant to acifluorfen, fluoroglycofen, and lactofen than was eastern black nightshade, but there was no significant difference between species in response to fomesafen. At the rate required to reduce tomato weight by 10%, eastern black nightshade weight was reduced 48, 32, 20, and 5% by acifluorfen, fluoroglycofen, lactofen, and fomesafen, respectively.

Keywords

Acifluorfenfluoroglycofenfomesafenlactofen
Type
Research
Information
Weed Technology , Volume 1 , Issue 2 , April 1987 , pp. 165 - 167
Copyright
Copyright © 1987 by the Weed Science Society of America 

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References

Literature Cited

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