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Propanil-Carbofuran Interactions 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
N. P. Tugwell
Affiliation:
Dep. of Entomol., Univ. of Ark., Fayetteville, AR 72701

Abstract

At intervals of 3 to 56 days, propanil (3′,4′-dichloropropionanilide) at 4.5 kg/ha was applied after treatments of carbofuran (2,3-dihydro-2,2- dimethyl-7-benzofuranylmethyl carbamate) at 0.7 kg/ha. Their interaction injured rice (Oryza sativa L., ‘Starbonnet’) vegetatively, but did not reduce grain yields, milling quality, or seed viability. Leaf chlorosis and necrosis developed within 7 days after propanil treatment and lasted for 2 to 4 weeks. As the time interval between carbofuran and propanil treatments increased, leaf injury decreased. Older rice recovered more quickly than younger rice. Interaction of carbofuran and propanil did not cause chlorosis or necrosis of rice leaves when the insecticide was applied 5 days after the herbicide. Propanil alone, applied once at 4.5 kg/ha, or applied sequentially at 4.5 kg/ha each time, caused only slight chlorosis of rice leaves.

Information

Type
Research Article
Copyright
Copyright © 1975 by the Weed Science Society of America 

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