Applied Entomology and Zoology (2000) 35, 131-136

Chiaki Fujiwara, J. Takabayashi and S. Yano (2000)
Effects of host-food plant species on parasitization rates of Mythimna separata (Lepidoptera : Noctuidae) by a parasitoid, Cotesia kariyai (Hymenoptera : Braconidae)
Applied Entomology and Zoology 35 (1), 131-136
Abstract: We measured the parasitization rates of Mythimna separata by a parasitoid, Cotesia kariyai, in a climate room on one species each of corn plant, kidney bean plant and Japanese radish plant. The trend of parasitization by wasps was corn > kidney bean > Japanese radish. In a cage, C. kariyai had greater olfactory responses to leaves (of corn, kidney bean, and Japanese radish) infested by the host larvae than to uninfested leaves. When we compared infested leaves using pairs of plant species, the wasps showed preference in this order: corn > kidney bean > Japanese radish. From GC-MS analysis, we found qualitative and quantitative differences in the blend of volatiles emitted from infested leaves of the three plant species. Such differences were considered to be one of the factors affecting the parasitization rates.
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Database assignments for author(s): Junji Takabayashi, Shuichi Yano

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
environment/habitat manipulation

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Mythimna separata	Maize/corn (Zea mays)	Japan
	Mythimna separata	Beans (Phaseolus)	Japan
Cotesia kariyai (parasitoid)	Mythimna separata	Maize/corn (Zea mays)	Japan
Cotesia kariyai (parasitoid)	Mythimna separata	Beans (Phaseolus)	Japan