Responses of the squash bug (Hemiptera: Coreidae) and its egg parasitoid, Gryon pennsylvanicum (Hymenoptera: Scelionidae) to three Cucurbita cultivars

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dc.contributor.author Vogt, Elizabeth A.
dc.contributor.author Nechols, James R.
dc.date.accessioned 2013-03-25T21:00:42Z
dc.date.available 2013-03-25T21:00:42Z
dc.date.issued 2013-03-25
dc.identifier.uri http://hdl.handle.net/2097/15413
dc.description.abstract Laboratory experiments were conducted to quantify effects of resistant and susceptible host plants on the preimaginal and adult biologies of the squash bug, Anasa tristis (De Geer), and its egg parasitoid, Gryon pennsylvanicum (Ashmead). `Early Prolific Straightneck' squash, `Green Striped Cushaw' pumpkin, and `Waltham Butternut' squash served as test plants. Preimaginal development of the squash bug (egg to adult) was similar on all three cultivars (range: 31-35 d). However, survivorship to the adult was significantly lower on `Green Striped Cushaw' and `Waltham Butternut' than on `Early Prolific Straightneck'. Statistical differences in survivorship were not observed in second-generation squash bugs, suggesting that some selection may have occurred. Squash bug reproduction and longevity were similar on all three cultivars. However, the reduced juvenile survivorship on `Green Striped Cushaw' and `Waltham Butternut' resulted in significantly lower r[subscript max] values on these cultivars than on the more susceptible `Early Prolific Straightneck'. The dietary history of adult squash bugs did not significantly affect development, preimaginal survival, or reproduction of G. pennsylvanicum. However, adult longevity of the parasitoid was significantly reduced when its larvae developed in eggs of squash bugs that were reared on the most resistant cultivar (`Waltham Butternut'). en_US
dc.language.iso en_US en_US
dc.relation.uri http://www.ingentaconnect.com/content/esa/envent/1993/00000022/00000001/art00033 en_US
dc.rights Permission to archive granted by the Entomological Society of America, March 7, 2013. This article is the copyright property of the Entomological Society of America and may not be used for any commercial or other private purpose without specific written permission of the Entomological Society of America. en_US
dc.subject Tri-trophic interactions en_US
dc.subject Biological control en_US
dc.subject Host plant resistance en_US
dc.subject Squash bug en_US
dc.subject Gryon pennsylvanicum en_US
dc.title Responses of the squash bug (Hemiptera: Coreidae) and its egg parasitoid, Gryon pennsylvanicum (Hymenoptera: Scelionidae) to three Cucurbita cultivars en_US
dc.type Article (publisher version) en_US
dc.date.published 1993 en_US
dc.citation.epage 245 en_US
dc.citation.issue 1 en_US
dc.citation.jtitle Environmental Entomology en_US
dc.citation.spage 238 en_US
dc.citation.volume 22 en_US
dc.contributor.authoreid jnechols en_US


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