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Rainfall Effects on Desmedipham and Phenmedipham Performance

Published online by Cambridge University Press:  12 June 2017

Monte D. Anderson and
W. Eugene Arnold
Monte D. Anderson
Affiliation:
Plant Sci. Dep., South Dakota State Univ., Brookings, SD 57007
W. Eugene Arnold
Affiliation:
Plant Sci. Dep., South Dakota State Univ., Brookings, SD 57007
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Abstract

The effect of rainfall on the performance of a tank mixture of desmedipham [ethyl m-hydroxycarbanilate carbanilate(ester)] and phenmedipham (methyl m-hydroxycarbanilate m-methylcarbanilate) applied postemergence to redroot pigweed (Amaranthus retroflexus L. ♯ AMARE), wild mustard (Sinapsis arvensis L. ♯ SINAR) and sunflower (Helianthus annuus L.) was evaluated in field studies. The occurrence of 1 mm of rain immediately after herbicide application significantly decreased the control of redroot pigweed and wild mustard. A rainfall quantity of 1 mm also reduced injury symptoms on sunflower. Simulating a 12.7-mm rain less than 18 h after desmedipham and phenmedipham application effectively reduced toxicity to redroot pigweed and sunflower. Toxicity to these two species increased at a lesser rate than for wild mustard as the time interval prior to rain was increased. A rain-free period of 6 h was predicted for near-maximum control of wild mustard with these herbicides.

Keywords

RainfallHelianthus annuusAmaranthus retroflexusSinapsis arvensisAMARESINAR

Information

Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 33 , Issue 3 , May 1985, pp. 391 - 394
Copyright
Copyright © 1985 by the Weed Science Society of America 

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References

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