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Response of Sugarbeets and Weeds to Phenmedipham and Two Analogues

Published online by Cambridge University Press:  12 June 2017

E. E. Schweizer  and
D. M. Weatherspoon
E. E. Schweizer
Affiliation:
Plant Sci. Res. Div., Agr. Res. Serv., U. S. Dep. of Agr., in cooperation with the Bot. and Plant Pathol. Dep., Colorado State Univ., Fort Collins, Colorado 80521
D. M. Weatherspoon
Affiliation:
Bot. and Plant Pathol. Dep., Colorado State Univ., Fort Collins Dyersburg State Community Coll., Dyersburg, Tennessee 38024
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Abstract

Responses of weeds and sugarbeets (Beta vulgaris L.) to postemergence treatments of methyl m-hydroxycarbanilate m-methylcarbanilate (phenmedipham) and two analogues were evaluated in six field studies. Phenmedipham at 1.7 kg/ha controlled foxtail millet (Setaria italica (L.) Beauv.) and kochia (Kochia scoparia (L.) Schrad.) better than 2.2 kg/ha of methyl m-hydroxycarbanilate carbanilate and ethyl m-hydroxycarbanilate carbanilate. Pigweed (Amaranthus spp.) was controlled better by the analogues at 1.1 kg/ha than by phenmedipham. The foliar growth of sugarbeets was generally suppressed more by the analogues than by phenmedipham, but injury was not considered detrimental at 1.1 kg/ha. Yield of sugarbeet roots and sugar was reduced by 7% or less by phenmedipham at rates of 1.1 to 4.5 kg/ha, but these yield reductions were associated primarily with the failure of phenmedipham to completely control all weeds for 5 to 9 weeks after treatment.

Type
Research Article
Information
Weed Science , Volume 19 , Issue 6 , November 1971 , pp. 635 - 639
Copyright
Copyright © Weed Science Society of America 

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References

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