Larviposition response ofBonnetia comta [Dipt.: Tachinidae] to a kairomone ofAgrotis ipsilon [Lep.: Noctuidae] |
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| Authors: | S L Clement W L Rubink D A McCartney |
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| Institution: | (1) Dept. of Entomology, The Ohio State University, 44691 Wooster, OH., U.S.A.;(2) The Ohio Agricultural Research and Development Center, 44691 Wooster, OH., U.S.A.;(3) Present address: Biological Control of Weeds Laboratory, Europe-c/o American Embassy-Agric., USDA, ARS, APO NY 09794-0007, U.S.A.;(4) Present address: Screwworm Research, USDA, ARS, Tuxtla Gutierrez, Apartado Postal # 544, Chiapas, Mexico |
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| Abstract: | A kairomone in the frass and vomitus of larvae ofAgrotis ipsilon (Hufnagel) (Lepidoptera: Noctuidae) triggered larviposition activity in its habitual parasitoidBonnetia comta (Fallen) (Diptera: Tachinidae). Laboratory bioassays showed that no measurable differences existed in the larviposition-stimulating activity of frass fromA. ipsilon larvae reared on 3 different food sources. In other tests, corn seedlings damaged by late-instar larvae ofA. ipsilon elicited strong larviposition activity inB. comta; other corn seedlings damaged with a razor blade did not elicit strong activity. Frass aged for 8-days was only slightly less effective at releasing a larviposition response when compared to fresh frass.B. comta was not stimulated to larviposit by oven dried frass or an India ink dot the color and shape of a fresh pellet from a host larva. The host habitat location and host finding process forB. comta and other tachinid species that deposit free-living maggots is discussed. |
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