Source and characterization of host recognition kairomones of Tetrastichus hagenowii, a parasitoid of cockroach eggs |
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| Authors: | S B VINSON G L PIPER |
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| Institution: | Department of Entomology, Texas A&M University, College Station, Texas;*Department of Entomology, Washington State University, Pullman, Washington, U.S.A. |
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| Abstract: | ABSTRACT. Recognition of Periplaneta americana (L.) oothecae by the egg parasitoid Tetrastichus hagenowii (Ratzeburg) (Hymenoptera: Eulophidae) is mediated by mucopolysaccharides from the salivary glands, and calcium oxalate from the colleterial glands of the roach. Calcium oxalate, the most active compound isolated, only elicits stereotyped host recognition behaviour from the parasitoid when perceived in the context of a curved surface. Although empty oothecae contain calcium oxalate, female T. hagenowii appear to determine the unsuitability of these oothecae soon after drumming begins and abandon them. The potential usefulness of host recognition kairomones in biological control is discussed. |
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| Keywords: | Host recognition behavioural chemicals cockroach biological control parasitoid-host relationships |
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