Circadian dynamics of locomotor activity and deltamethrin susceptibility in the pine weevil,Hylobius abietis |
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Authors: | Maciej A Pszczolkowski Marek Dobrowolski |
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Institution: | (1) Dept. of Forest Protection, Forestry Research Institute, PL-OO-973 Warsaw, Poland;(2) Present address: Dept. of Life Science, National Tsing-Hua University, 30043 Hsinchu, Taiwan R.O.C. |
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Abstract: | Rhythmic locomotor activity and daily susceptibility to deltamethrin were tested in the pine weevil,Hylobius abietis (L.) (Coleoptera, Curculionidae), a pest of young conifer plants. In constant darkness, beetles revealed a free-running circadian
pattern of locomotor activity (average period 22h : 20min). Under long photoperiod, L:D 18:6, entrainment of motor activity
was observed. In the entrained population of the weevils, a peak of locomotor activity occurred at about the beginning of
the dark phase, and the minimum occurred in the middle of the light phase. Fluctuations of susceptibility to a standard dose
of deltamethrin (0.5 μg/g body weight) varied across the day, and were inversely correlated to the changes in locomotor activity.
The importance of considering the daily organization of insect biology in studying insect resistance to pesticides is re-emphasized.
3 www.csa.com. The following databases were screened: Animal Behaviour Abstracts, AGRICOLA, Aquatic Science and Fishery Abstracts,
Biological Sciences, Ecology Abstracts, Entomology Abstracts, Environmental Science and Pollution Abstracts, Health and Safety
Science Abstracts, Pollution Abstracts, Water Resource Abstracts, Toxicology Abstracts, TOXLINE. |
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Keywords: | Hylobius abietis circadian rhythmicity chronotoxicology pyrethroids video-digitizing system OXALIS |
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