Paper Information

Journal:   APPLIED ENTOMOLOGY AND PHYTOPATHOLOGY   September 2003 , Volume 71 , Number 1; Page(s) 79 To 90.
 
Paper: 

FUNCTIONAL RESPONSES OF THREE SPECIES OF PREDATORY LADYBIRDS (COLEOPTERA: COCCINELLIDAE) TO POPULATION DENSITIES OF BEMISIA TABACI (HOMOPTERA: ALEYRODIDAE)

 
 
Author(s):  GHAHARI H., SHOJAI M., BAYAT ASADI H.
 
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Abstract: 

The functional response of ladybirds, Coccinella septempunctata L., Hippodamia variegata Goeze, and Clitostethus arcuatus Rossi (Coleoptera: Coccinellidae) was evaluated on different densities of Bemisia tabaci Gennadius in the laboratory, at 25±2 °C, 75 - 90% RH, and 16: 8 (L:D) photoperiod. All data fitted well to the type II model of the Holling disc equation. The predators consumed larger numbers of early than late instars of B. tabaci within the same exposure time. Adult C. arcuatus had a lower instantaneous searching efficiency and handling time and could also consume larger numbers of B. tabaci than could mature larvae. Overall, the predation efficiency of C. septempunctata on B. tabaci was higher than other ladybirds, thus it can control the aleyrodids population effieiciently.

 
Keyword(s): FUNCTIONAL RESPONSE, LADYBIRDS, BEMISIA TABACI, PREDATION
 
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