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Integration of a Microbial Herbicide into Weed and Pest Control Programs in Rice (Oryza sativa)

Published online by Cambridge University Press:  12 June 2017

Richard A. Klerk ,
Roy J. Smith Jr.  and
David O. TeBeest
Richard A. Klerk
Affiliation:
Dep. Agron., Univ. of Arkansas, Fayetteville, AR 72701
Roy J. Smith Jr.
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric., Stuttgart, AR 72160
David O. TeBeest
Affiliation:
Dep. Plant Pathol., Univ. of Arkansas, Fayetteville, AR 72701
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Abstract

Field research was conducted in Arkansas to determine the effect of selected rice pesticides on the microbial herbicide Colletotrichum gloeosporioides (Penz.) Sacc. f. sp. aeschynomene (henceforth designated C.g.a.) and to integrate C.g.a. into control programs for northern jointvetch [Aeschynomene virginica (L.) B.S.P. # AESVI] in rice (Oryza sativa L.). Water suspensions of dry-formulated spores of C.g.a. at 1.9 × 1011 spores/ha were applied midseason in sequence with normal use rates of other pesticides. Carbofuran (2,3-dihydro-2,2-dimethyl-7-benzofuranyl methyl-carbamate) at 0.56 kg ai/ha, propanil (3’4’-dichloropropio-anilide) at 2.2 kg ai/ha, acifluorfen {5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoic acid} at 0.14 kg ai/ha, or fentin hydroxide (triphenyltin hydroxide) at 0.56 kg ai/ha did not reduce disease development of C.g.a. on northern jointvetch. Sequential applications of benomyl [methyl 1-(butylcarbamoyl)-2-benzimidazolecarbamate] at 0.56 kg ai/ha reduced activity of the fungus on northern jointvetch when fungicide applications began 1 week after C.g.a. application but had no effect on mycoherbicide activity when applications began 2 weeks after C.g.a.

Keywords

Mycoherbicidebiological weed controlintegrated pest managementAeschynomene virginicaColletotrichum gloeosporioides f. sp. aeschynomeneAESVI
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 33 , Issue 1 , January 1985 , pp. 95 - 99
Copyright
Copyright © 1985 by the Weed Science Society of America 

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References

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