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Biological Control of Ducksalad (Heteranthera limosa) by the Waterlily Aphid (Rhopalosiphum nymphaeae) in Rice (Oryza sativa)

Published online by Cambridge University Press:  12 June 2017

Michael J. Oraze  and
Albert A. Grigarick
Michael J. Oraze
Affiliation:
Dep. Entomol., Univ. Calif., Davis, CA, 95616
Albert A. Grigarick
Affiliation:
Dep. Entomol., Univ. Calif., Davis, CA, 95616
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Abstract

Ducksalad, an annual broadleaf weed in rice, was infested by waterlily aphid which destroyed much of the above-water vegetation. Field experiments showed aphids reduced total weed biomass by 58 and 87% in 1985 and 1986, respectively. Biomass of seed pods was reduced by more than 82% in both years.

Keywords

Ducksalad, Heteranthera limosa (Sw.) Willd. #3 HETLIrice, Oryza sativa L., M-202waterlily aphid, Rhopalosiphum nymphaeae L.Agroecosysteminsectherbivoreweed suppression
Type
Special Topics
Information
Weed Science , Volume 40 , Issue 2 , June 1992 , pp. 333 - 336
Copyright
Copyright © 1992 by the Weed Science Society of America 

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