Sublethal Effects of Thiamethoxam on the Demographic Parameters of Myzus persicae (Hemiptera: Aphididae)

被引:26
作者
Wang, Pan [1 ]
Zhou, Li-Lin [1 ]
Yang, Fan [1 ]
Li, Mang [1 ]
Liu, Xiao-Ming [1 ]
Wang, Yong [1 ]
Lei, Chao-Liang [2 ]
Si, Sheng-Yun [1 ]
机构
[1] Wuhan Acad Agr Sci & Technol, Inst Vegetable, Wuhan 430345, Hubei, Peoples R China
[2] Huazhong Agr Univ, Coll Plant Sci & Technol, Hubei Insect Resources Utilizat & Sustainable Pes, Wuhan 430070, Hubei, Peoples R China
关键词
sublethal concentration; integrated pest management; neonicotinoid; thiamethoxam; demographic parameter; GREEN PEACH APHID; LIFE TABLE PARAMETERS; NEONICOTINOID INSECTICIDES; COLEOPTERA-COCCINELLIDAE; BENEFICIAL ARTHROPODS; FEEDING-BEHAVIOR; POTATO APHID; COTTON APHID; HORMESIS; GOSSYPII;
D O I
10.1093/jee/tox112
中图分类号
Q96 [昆虫学];
学科分类号
摘要
The green peach aphid, Myzus persicae Sulzer (Hemiptera: Aphididae), is an important sap-sucking pest of many crops, including Chinese cabbage, Brassinca oleracea L. The neonicotinoid insecticide thiamethoxam has been used as an effective insecticide to control M. persicae in cabbage fields. In this study, we assessed the effects of sublethal concentrations of thiamethoxam on demographic parameters of M. persicae. In leaf-dip bio-assays, thiamethoxam showed a relatively high toxicity against M. persicae with an LC50 of 6.80 mg liter(-1). The duration of the preadult stage was not significantly affected in the sublethal bioassay. Additionally, the longevity and adult preoviposition period were not significantly affected by sublethal thiamethoxam. However, sublethal thiamethoxam significantly increased fecundity (LC10) and prolonged the total preoviposition period (LC40). Consequently, the finite rate of increase (lambda) and the intrinsic rate of increase (r(m)) of aphids exposed to the LC40 were significantly lower than those of control aphids, whereas the net reproductive rate (R-0) was higher, and the generation time (T) and the population doubling time (DT) were longer in the treated group. Based on these results, hormesis was induced by sublethal thiamethoxam in M. persicae, with the population growth of M. persicae negatively affected at higher sublethal concentrations of thiamethoxam. Therefore, our study indicated that the possible effects of thiamethoxam on aphids require further study to develop optimized integrated pest management strategies.
引用
收藏
页码:1750 / 1754
页数:5
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