Journal of Applied Entomology (2004) 128, 292-297

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W.-X. Cheng, J.-J. Wang, W. Ding and Z.-M. Zhao (2004)
Inhibition kinetics on carboxylesterase and acetylcholinesterase of Liposcelis bostrychophila and Liposcelis entomophila (Psocop., Liposcelididae) of two insecticides
Journal of Applied Entomology 128 (4), 292-297
Abstract: The inhibition kinetics on carboxylesterase (CarE) and acetylcholinesterase (AChE) of Liposcelis bostrychophila and Liposcelis entomophila of paraoxon and carbosulfan were compared. The results showed that L. entomophila exhibited significantly greater specific activity of CarE than L. bostrychophila [0.045 vs. 0.012 µmol of alpha-naphthyl acetate (alpha-NA) hydrolysed/mg protein/min]. Moreover, L. entomophila showed higher affinity (i.e. lower Km value) to the substrate alpha-NA than L. bostrychophila (0.29 vs. 0.67 mm). For AChE-specific activity and affinity, no significant differences between the two species were observed. Based on the I50 values, AChE of L. bostrychophila was more sensitive to paraoxon and carbosulfan than that of L. entomophila. According to inhibition kinetics, the results revealed that AChE of L. bostrychophila was 3.8-fold more sensitive to inhibition by paraoxon than that of L. entomophila, but L. entomophila was 1.5-fold more susceptible to carbosulfan.
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Link to article at publishers website
Database assignments for author(s): Jin-Jun Wang

Research topic(s) for pests/diseases/weeds:
pesticide resistance of pest
control - general


Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Liposcelis bostrychophila
Liposcelis entomophila