Novel meta-diamide insecticide, broflanilide, suppresses the population of common cutworm Spodoptera litura through its lethal and sublethal effects
文献类型： 外文期刊
作者： Shen, Ning 1 ; Liu, Huai-Yu 1 ; Mou, Tong-Yu 1 ; Ma, Yi-Bo 1 ; Li, Yao 1 ; Song, Zi-Jiao 1 ; Tang, Tao 2 ; Han, Zhao-Jun; 1 ;
作者机构： 1.Nanjing Agr Univ, Key Lab Integrated Pest Management Crops East Chi, Minist Agr, Nanjing 210095, Peoples R China
2.Hunan Acad Agr Sci, Inst Plant Protect, Changsha, Peoples R China
关键词： broflanilide; ecological effect; fecundity; Lepidopteran; population; Spodoptera litura; sublethal effect
期刊名称：PEST MANAGEMENT SCIENCE （ 影响因子：4.845； 五年影响因子：4.674 ）
ISSN： 1526-498X
年卷期：
页码：
收录情况： SCI
摘要： BACKGROUND Broflanilide has been registered in China for the control of Lepidoptera and Coleoptera pests, and is widely used to control the target pests at lethal and sublethal levels. The lethal and sublethal effects of broflanilide on the common cutworm (CCW) Spodoptera litura Fabricius, a representative Lepidopteran pest in agricultural crops, were examined to explore its ecological influence on pests. RESULTS In F-0, broflanilide had little influence on the hatchability of eggs, but significantly reduced the neonate survival rate. The lethal activity of broflanilide towards third-instar larvae and adults was 0.13 mg kg(-1) (LD50) and 3.59 mg L-1 (LC50) respectively at 48 h. After being treated with a sublethal dose (LD10 and LD30) of broflanilide, the duration of third- to sixth-instar larvae and the mean fecundity of reproductive females were significantly increased, but pupation rate, weight of pupae and life-cycle rate were significantly decreased. In F-1, the duration of F-1 larvae and the doubling time were prolonged, whereas the rates of pupation and the life cycle were decreased by 14.92% and 18.00%, respectively. The intrinsic rate of increase, finite rate of increase and net reproductive rate in the sublethal group were lower than in the control group. The relative fitness of F-1 treated by LD10 and LD30 was 0.81 and 0.66, respectively. CONSLUSION Broflanilide not only has highly lethal activity, but also suppresses the population growth and progeny of CCW, as a critical factor for guidelines of its usage in the field.
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