Dong Junfeng, Wang Kai, Li Yang, Wang Shaoli
Forestry College, Henan University of Science and Technology, Luoyang 471003, Henan, China.
Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
Pestic Biochem Physiol. 2017 Mar;136:58-63. doi: 10.1016/j.pestbp.2016.08.003. Epub 2016 Aug 8.
Cyantraniliprole is a novel anthranilic diamide insecticide registered for the control of many sucking and chewing insect pests including the oriental tobacco budworm, Helicoverpa assulta (Guenée), which is an important lepidopteran pest of tobacco in China. This study determined the lethal and sublethal effects of cyantraniliprole on a treated parental generation and on an untreated offspring generation of H. assulta. Cyantraniliprole was incorporated in the diet of 3rd-instar larvae of the parental generation. Cyantraniliprole was highly toxic to the parental generation: after a 72-h feeding period, the LC was 0.176mg/L. Cyantraniliprole tended to increase the developmental time of parental larvae, and the LC significantly reduced the pupation rate and the pupal weight. Cyantraniliprole also significantly decreased the intrinsic rate of increase (r) and finite rate of increase (λ), and increased the doubling time (Dt). Treatment of the parental generation with the LC decreased the pupal weight and adult fecundity, and increased adult deformity in the parental and offspring generations. Cyantraniliprole did not significantly affect the pupal period, the percentage of females, or adult longevity in either generation. These results suggest that both the lethal and sublethal effects of cyantraniliprole might suppress H. assulta population growth by reducing the insect's survival, development, and reproduction.
氰虫酰胺是一种新型邻氨基苯甲酰胺类杀虫剂,已登记用于防治多种刺吸式和咀嚼式害虫,包括烟青虫,它是中国烟草上一种重要的鳞翅目害虫。本研究测定了氰虫酰胺对烟青虫亲代和未处理子代的致死和亚致死效应。将氰虫酰胺添加到亲代3龄幼虫的饲料中。氰虫酰胺对亲代具有高毒性:经过72小时的取食期后,LC₅₀为0.176mg/L。氰虫酰胺倾向于延长亲代幼虫的发育时间,且LC₅₀显著降低化蛹率和蛹重。氰虫酰胺还显著降低内禀增长率(r)和周限增长率(λ),并延长加倍时间(Dt)。用LC₅₀处理亲代降低了蛹重和成虫繁殖力,并增加了亲代和子代成虫的畸形率。氰虫酰胺对两代的蛹期、雌虫比例或成虫寿命均无显著影响。这些结果表明,氰虫酰胺的致死和亚致死效应可能通过降低该昆虫的存活、发育和繁殖来抑制烟青虫种群增长。