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Tomato (Lycopersicon esculentum) and Eastern Black Nightshade (Solanum ptycanthum) Tolerance to Aciflurofen

Published online by Cambridge University Press:  12 June 2017

Stanley F. Gorski
Affiliation:
The Ohio State Univ., Dep. Hort., Columbus, OH 43210
Monica K. Wertz
Affiliation:
The Ohio State Univ., Dep. Hort., Columbus, OH 43210

Abstract

Field experiments were conducted to determine the influence of growth stage on tolerance of seeded tomatoes (Lycopersicon esculentum Mill.) and of eastern black nightshade (Solanum ptycanthum Dun. #3 SOLPT) to the sodium salt of acifluorfen {5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoic acid} at low use rates. Tomatoes as young as the 2 true-leaf stage exhibited some tolerance to acifluorfen at rates of 0.14 kg ae/ha and less. Rates of 0.28 and 0.56 kg/ha caused increased phytotoxicity; however, yield was not greatly reduced. At the 8-leaf stage, foliar injury was slight and existed only at the highest rates tested; however, tomato yields were reduced. Control of black nightshade at the 2-leaf stage was acceptable at rates as low as 0.14 kg/ha. When nightshade was at the 5-leaf stage, 0.28 and 0.56 kg/ha rates provided acceptable control − 87% and 96%, respectively. Nightshade in the 10-leaf stage was not controlled effectively at rates below 0.56 kg/ha.

Type
Research
Copyright
Copyright © 1987 by the Weed Science Society of America 

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References

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