Chemically mediated arrestment of the predaceous mitePhytoseiulus persimilis by extracts ofTetranychus evansi andTetranychus urticae |
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| Authors: | G. J. De Moraes J. A. McMurtry |
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| Affiliation: | (1) Division of Biological Control, Department of Entomology, University of California, 92521 Riverside, CA, USA;(2) Present address: CPATSA/EMBRAPA, 56300 Petrolina, PE, Brazil |
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| Abstract: | SinceTetranychus evansi Baker and Pritchard had been observed to be unfavorable prey for several species of phytoseiid mite predators, a study was conducted to determine the possible existence of an allomone produced by this species againstPhytoseiulus persimilis Athias-Henriot. Instead,P. persimilis was strongly arrested by extracts of eggs, adults and, especially, webbing plus excreta ofT. evansi. Methanol extracts ofTetranychus urticae (Koch) showed a stronger arrestment than extracts ofT. evansi. |
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