Applied Entomology and Zoology (2000) 35, 393-399

M.E. Sato, T. Miyata, A. Kawai and O. Nakano (2000)
Selection for resistance and susceptibility to methidathion and cross resistance in Amblyseius womersleyi Schicha (Acari : Phytoseiidae)
Applied Entomology and Zoology 35 (3), 393-399
Abstract: Artificial laboratory selections for resistance and susceptibility to methidathion were performed in Amblyseius womersleyi Schicha. After four selections for resistance and three selections for susceptibility, the resistance ratio (R/S) at the LC₅₀ increased from 16 to 342. The toxicity of eight pesticides was evaluated in the R and S strains of this phytoseiid mite. The highest resistance ratios were observed for the insecticides methidathion, acephate, and malathion, for which the R strain was respectively 311, 20.4, and 13.1 times more resistant than the S strain. In the case of the pyrethroid bifenthrin, no cross resistance was observed for this chemical.
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Database assignments for author(s): Mário Eidi Sato, Tadashi Miyata, Akira Kawai

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.
Neoseiulus womersleyi (predator)			Japan