Acta Entomologica Sinica (1998) 41, S26-S33

Tengwu Li, Xiwu Gao, Bingzong Zheng, Shuxum Zhu and Shengyun Si (1998)
[A study on carboxylesterase activity in insecticide resistant and susceptible populations of diamondback moth, Plutella xylostella, from different regions]
Acta Entomologica Sinica 41 (Suppl.), S26-S33
Abstract: The properties of carboxylesterase and insecticide resistance were investigated in diamondback moth (DBM), Plutella xylostella collected from Wuhan, Hubei Province and Zhangjiakou, Hubei Province during 1995 to 1997. The resistant levels of the Zhangjiakou population to avermectin, malathion, hexaflumuron and deltamethrin were 1.8, 2.9, 0.5 and 1.7-folds and that of Wuhan population were 4.3, 2.2, 3.2 and 2.4-folds respectively, compared with the susceptible strain. There was a significant difference in carboxylesterase (CarE) activity among larvae of the above two field populations and one susceptible strain and no difference in CarE activity among the adults of the above three populations, when alpha-naphthyl acetate (alpha-NA) or ß-naphthyl acetate (ß-NA) was used as substrate. The affinity of CarE toward alpha-NA was almost the same as that toward ß-NA in larvae of the two field populations, but the affinity of CarE was much higher toward alpha-NA than toward ß-NA in the susceptible strain. Inhibition on CarE by SV1 and paraoxon was much stronger in the susceptible strain than in the Wuhan population.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Chinese)
Database assignments for author(s): Xi-Wu Gao

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

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Plutella xylostella		China (south)