Journal of Applied Entomology (2013) 137, 310-316

T. Kuriwada, N. Kumano, K. Shiromoto and D. Haraguchi (2013)
Effects of intra- and inter-specific competition on fitness of sweetpotato weevil and West Indian sweetpotato weevil
Journal of Applied Entomology 137 (4), 310-316
Abstract: The sweetpotato weevil Cylas formicarius (Fabricius) (Coleoptera: Brentidae) and West Indian sweetpotato weevil Euscepes postfasciatus (Fairmaire) (Coleoptera: Curculionidae) are major pests of sweet potato Ipomoea batatas (L.) Lam., in tropical and subtropical regions. Effects of intra- and inter-specific competition on the number of progeny (fecundity), body weight and developmental time of C. formicarius and E. postfasciatus were examined in single- and mixed-species treatments under laboratory conditions. Cylas formicarius tended to outcompete E. postfasciatus, whereas E. postfasciatus rather than C. formicarius tolerated higher conspecific densities. We discuss the implications of the results for pest management and resource partitioning of pestiferous weevils.
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Link to article at publishers website
Database assignments for author(s): Takashi Kuriwada, Norikuni Kumano

Research topic(s) for pests/diseases/weeds:
environment - cropping system/rotation

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Cylas formicarius	Sweet potato (Ipomoea batatas)
	Euscepes postfasciatus	Sweet potato (Ipomoea batatas)