Different responses of three predatory mite species toTetranychus urticae,Eriophyes dioscoridis andBrevipalpus pulcher: Evidence for the existence of kairomones and allomones |
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| Authors: | Aly H. Rasmy H. A. Abdel-Rahman M. M. Abdel-Kader H. E. Hussein |
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| Affiliation: | (1) Plant Protection Dept., National Research Centre, Dokki, Carro;(2) Entomology Dept., Faculty of Science, Ain-Shams Univ., Cairo, Egypt |
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| Abstract: | The responses of 3 phytoseiid mite speciesPhytoseiulus persimilis Athias-Henriot,Phytoseius finitimus Ribaga andAmblyseius gossipi Elbadry to allelochemics emitted by prey mite speciesTetranychus urticae Koch,Brevipalpus pulcher (Canestrini & Fanzago) andEriophyes dioscoridis Soliman & Abou-Awad were studied using a test of two-choice assays. The repellent effect elicited by the tenuipalpid mite,B. pulcher and the eriophyid mite,E. dioscoridis againstP. persimilis could be an evidence for the existence of allomones produced by these 2 prey species. The negative response ofP. persimilis to the different stadia ofB. pulcher and the attraction ofP. finitimus toward the same prey suggest that the volatile semiochemicals produced by this prey act as kairomones forP. finitimus and as allomones forP. persimilis. The strong attraction ofP. finitimus andA. gossipi to the different stadia ofT. urticae and the considerable attraction of either predator toB. pulcher compared to the neutral response toE. dioscoridis reveal that both predators show a hierarchy of preference for the kairomones of the 3 prey species studied. |
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| Keywords: | kairomones allomones prey preference Phytoseiulus persimilis Phytoseius finitimus Amblyseius gossipi Tetranychus urticae Brevipalpus pulcher Eriophyes dioscoridis |
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