Acta Entomologica Sinica (2002) 45, 215-220

Yong Jiang, Zhong-Ning Zhang, Chang-Ying Niu, Jian-Hua Deng and Chao-Liang Lei (2002)
Effects of avermectin on the suppression of the peach aphid, Myzus persicae, by Orius similis
Acta Entomologica Sinica 45 (2), 215-220
Abstract: The toxicity of avermectins, 1% of 9512-1 EC and 1.8% of Chongmanke, against Orius similis were determined by laboratory bioassay. The effects of avermectins on the functional and numerical responds of O. similis were also studied. The results showed that avermectins were toxic to adults and nymphae of O. similis, while the sensitivity of eggs was much lower than adults and nymphae. Although the main component of 9512-1 and Jiqi Chongmanke was the same, their effects on O. similis were different: for 9512-1 the LC₅₀ against eggs, nymphae and adults were 11.2743 ± 3.8613, 2.6584 ± 1.2139, and 2.4508 ± 1.3266 mg X L^-1, respectively; for Chongmanke, 10.8699 ± 3.7653, 6.4422 ± 2.8596, 6.4738 ± 3.0124 mg X L^-1 respectively. The toxicity of 9512-1 on O. similis was higher than Chongmanke. Avermectin decreased the consumption and hunting capacity of O. similis on green peach aphids, and it also decreased individual competition ability of O. similis. Furthermore, it postponed the development of the nymphae, whereas it slightly affected the relationship between the growth velocity and the consumption as well as the oviposition.
(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): Chao-Liang Lei, Chang-Ying Niu

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
health/environmental effects of pesticides
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.
	Myzus persicae
Orius strigicollis (predator)	Myzus persicae