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Effect of Light on the Herbicidal Activity of Some Amiben Derivatives

Published online by Cambridge University Press:  12 June 2017

A. R. Isensee ,
J. R. Plimmer  and
B. C. Turner
A. R. Isensee
Affiliation:
Crops Research Division, Agr. Res. Serv., U. S. Dep. of Agr., Pesticide Investigations-Behavior in Soils, Plant Industry Station, Beltsville, Maryland
J. R. Plimmer
Affiliation:
Crops Research Division, Agr. Res. Serv., U. S. Dep. of Agr., Pesticide Investigations-Behavior in Soils, Plant Industry Station, Beltsville, Maryland
B. C. Turner
Affiliation:
Crops Research Division, Agr. Res. Serv., U. S. Dep. of Agr., Pesticide Investigations-Behavior in Soils, Plant Industry Station, Beltsville, Maryland
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Abstract

Residual herbicidal action of 3-amino-2,5-dichlorobenzoic acid (amiben), the methyl ester of amiben, 3-acetamido-2,5-dichlorobenzoic acid (N-acetyl amiben), 3-propionamido-2,5-dichlorobenzoic acid (N-propionyl amiben), 3-benzamido-2,5-dichlorobenzoic acid (N-benzoyl amiben), and the methyl ester of N-benzoyl amiben after 0, 1, 2, 4, and 6 hr irradiation was measured by oats (Avena sativa L., var. Markton) bioassay. In a greenhouse study, amiben and N-benzoyl amiben were applied to the soil surface, exposed to sunlight for 7.5 hr, and similarly bioassayed. Amiben, the methyl ester of amiben, and N-acetyl amiben lost 40 to 60% of their original herbicidal activity after 2 to 4 hr irradiation in the laboratory. N-benzoyl amiben and its methyl ester retained over 90% of their activity after 6 hr irradiation. Solar illumination reduced the herbicidal activity of amiben applied to the surface of wet soil by 11 to 14% but had no effect on N-benzoyl amiben. On a dry soil, the losses of amiben and N-benzoyl amiben were not significant.

Type
Research Article
Information
Weed Science , Volume 17 , Issue 4 , October 1969 , pp. 520 - 523
Copyright
Copyright © 1969 Weed Science Society of America 

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References

Literature Cited

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