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Propanil and Adjuvants for Barnyardgrass Control in Rice

Published online by Cambridge University Press:  12 June 2017

R. J. Smith Jr.*
Affiliation:
Agr. Res. Serv., U.S. Dep. of Agr., Stuttgart, AR 72160

Abstract

A nonphytotoxic paraffinic oil at 2.5, 5, and 10% (v/v) or a blended alkylaryl sulfonate surfactant at 0.5, 1, and 2% (v/v) did not enhance the activity of propanil (3′,4′-dichloropropionanilide) at 1.7, 3.4, and 6.7 kg/ha applied as a foliage spray in aqueous systems on barnyardgrass [Echinochloa crus-galli (L.) Beauv.] or rice (Oryza sativa L. ‘Starbonnet’). Time and rate of applying propanil affected control of barnyardgrass. Barnyardgrass control and rice yield were best with treatments of 3.4 or 6.7 kg/ha of propanil to four-leaf grass plants. Propanil at 6.7 kg/ha controlled tillering and jointing barnyardgrass well enough to increase grain yields over those of untreated rice.

Type
Research Article
Copyright
Copyright © 1974 by the Weed Science Society of America 

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