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Weed Control in Sunflowers (Helianthus annuus) with Desmedipham and Phenmedipham

Published online by Cambridge University Press:  12 June 2017

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

Desmedipham [ethyl m-hydroxycarbanilate carbanilate(ester)] controlled wild mustard (Sinapsis arvensis L. ♯3 SINAR) and redroot pigweed (Amaranthus retroflexus L. ♯ AMARE) more effectively than phenmedipham (methyl m-hydroxycarbanilate m-methylcarbanilate). A synergistic interaction occurred with all tank-mix combinations of the two herbicides for wild mustard control, except combinations containing 0.71 kg ai/ha of desmedipham. The magnitude of the synergism decreased as the rate of desmedipham was increased and increased as the rate of phenmedipham increased. Both herbicides caused injury symptoms of leaf necrosis and height reduction to sunflowers (Helianthus annuus L.). Crop injury and sunflower heights were affected more by desmedipham than by phenmedipham. Injury effects were temporary and had no influence on sunflower yields.

Keywords

Amaranthus retroflexusSinapsis arvensisantagonismsynergismAMARESINAR
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 32 , Issue 3 , May 1984 , pp. 310 - 314
Copyright
Copyright © 1984 by the Weed Science Society of America 

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References

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