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Spatial patterns of the parasitic mite Hemisarcoptes coccophagus (Astigmata: Hemisarcoptidae): host effect, density-dependence of aggregation, and implications for biological control

Published online by Cambridge University Press:  10 July 2009

Sergey Izraylevich  and
Uri Gerson
Sergey Izraylevich*
Affiliation:
Department of Entomology, The Hebrew University of Jerusalem, Rehovot, Israel
Uri Gerson
Affiliation:
Department of Entomology, The Hebrew University of Jerusalem, Rehovot, Israel
*
Dr U. Gerson, Department of Entomology, Faculty of Agriculture, The Hebrew University of Jerusalem, POB 12, Rehovot 76100, Israel.
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Abstract

The spatial distribution of the parasitic mite Hemisarcoptes coccophagus Meyer on two armoured scale insects (Homoptera: Diaspididae) was highly aggregated in the field. Mites were more aggregated on young than on ovipositing host scale females. No differences in the mite's distribution pattern were found between latania scale (Hemiberlesia lataniae (Signoret)) and oleander scale (Aspidiotus nerii (Bouché)). Mite aggregation was density-dependent on ovipositing host females (the degree of overdispersion decreased as mite abundance increased), but density-independent on young females. The effect of density-dependent and independent mite aggregation on the proportion of hosts escaping attack at different parasite abundances was simulated, and its relevance to biological control of Diaspididae is discussed.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 85 , Issue 2 , June 1995 , pp. 235 - 240
Copyright
Copyright © Cambridge University Press 1995

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