Sublethal Effects of Metaflumizone on Plutella xylostella (Lepidoptera: Plutellidae)

被引:20
作者
Zhang Zhe [1 ]
Li Jian-hong [1 ]
Gao Xi-wu [2 ]
机构
[1] Huazhong Agr Univ, Coll Plant Sci & Technol, Wuhan 430070, Peoples R China
[2] China Agr Univ, Dept Entomol, Beijing 100193, Peoples R China
关键词
Plutella xylostella; metaflumizone; sublethal dose; life table parameters; DIAMONDBACK MOTH; RESISTANCE;
D O I
10.1016/S2095-3119(12)60108-7
中图分类号
S [农业科学];
学科分类号
09 ;
摘要
Metaflumizone is a novel sodium channel blocker insecticide, which has been registered for controling the diamondback moth (DBM), Plutella xylostella (Lepidoptera: Plutellidae) in China. It is unavoidable for DBMs to be exposed to sublethal dose of metaflumizone in brassicaceous vegetable field. Sublethal effects of metaflumizone at LC15 (1.06 mg L-1) and LC25 (2.03 mg L-1) on the biological characteristics were investigated. Pupation rate, pupal period and pupal weight were significantly declined comparing with the control (P=0.05) when third instar larvae were exposed to LC15 and LC25 of metaflumizone. Comparing the control group to LC15 and LC25 treatment groups, there were significant differences in the development periods of eggs, first instar larvae, pupae and total preoviposition period. The peak of age-specific fecundity in LC15 and LC25 treatment groups was lagged behind control group. Mean values of intrinsic rate of increase (r(m)), net reproductive rate (R-0) and finite rate of increase (lambda) observed from the LC15 and LC25 treatment groups were lower than those from the control group. But mean values of gross reproduction rate (GRR) was not different. The mean generation time (T) of the treatment groups was prolonged. Whether sublethal doses of metaflumizone could stimulate reproduction in the long term needs further investigation on continuous generations.
引用
收藏
页码:1145 / 1150
页数:6
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