Acta Entomologica Sinica (1998) 41, 359-365

Fuxing Zhu, Jinxin Wang, Feng Liu, Wei Mu and Xin Zhang (1998)
[Studies on insecticide susceptibility of ladybirds]
Acta Entomologica Sinica 41 (4), 359-365
Abstract: Susceptibility to four kinds of insecticides of Coccinella septempunctata Linnaeus and Propylea japonica (Thunberg) collected from regions where insecticides application levels were different was assayed. Differences of susceptibility of lady birds collected from the same region to different insecticides were remarkable. The order of toxicities was: cyhalothrin > methomyl > methamidophos > endosulfan. Toxicity of cyhalothrin to larvae of C. septempunctata was 8560 times higher than that of endosulfan and to adult was 617 times higher. Differences of susceptibility of C. septempunctata to the same insecticide among populations from different regions were not obvious. But P. japonica collected from Xiajin county where application level of insecticides was high showed 30.6 times more resistant to cyhalothrin when compared with the population from Laiwu where the application level of insecticides was low. The selective toxicity of different insecticides to C. septempunctata and resistant Aphis gossypii differed greatly. The order of selective toxicities was: endosulfan > methomyl > methamidophos > cyhalothrin. The selective toxicity index of endosulfan was 4.9 where as the selective toxicity index of cyhalothrin was only 7.3 X 10^-6. Endosulfan is recommended to control the resistant A. gossypii.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Chinese)

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
resistance to pesticides

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
Coccinella septempunctata (predator)
Propylea japonica (predator)