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Quantitative evaluation of the feeding of the carmine spider mite Tetranychus cinnabarinus (Boisd.) (Acari, Tetranychidae)

Published online by Cambridge University Press:  10 July 2009

A. Hazan ,
U. Gerson  and
A. S. Tahori
A. Hazan
Affiliation:
The Hebrew University of Jerusalem, Faculty of Agriculture, P.O. Box 12, Rehovot 76–100, IL
U. Gerson
Affiliation:
The Hebrew University of Jerusalem, Faculty of Agriculture, P.O. Box 12, Rehovot 76–100, IL
A. S. Tahori
Affiliation:
Israel Institute of Biological Research, Ness Ziona, IL
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Abstract

Faecal pellet production by Tetranychus cinnabarinus (Boisd.) was recorded at different temperatures (19, 24, 30, 35°C) and relative humidities (0% to 100%); at all temperatures pellet production was greater under dry than under wet conditions. A feeding index based on faecal pellet production and the proportion of adults surviving each day showed that the optimal conditions for the mite were 24°C and 38% r.h. Pellet production increased under continuous light and, under any particular set of conditions, was closely correlated with the numbers of eggs laid. It is concluded that faecal pellet production can be used as a measure of feeding within a given set of conditions provided it is supplemented and checked by other data.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 65 , Issue 3 , October 1975 , pp. 515 - 521
Copyright
Copyright © Cambridge University Press 1975

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