Key Laboratory of Integrated Pest Management on Crops in East China, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, China.
Institute of Plant Protection, Hunan Academy of Agricultural Sciences, Changsha, China.
Pest Manag Sci. 2022 Mar;78(3):1081-1089. doi: 10.1002/ps.6719. Epub 2021 Dec 2.
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.
In F , 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 (LD ) and 3.59 mg L (LC ) respectively at 48 h. After being treated with a sublethal dose (LD and LD ) 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 , the duration of F 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 treated by LD and LD was 0.81 and 0.66, respectively.
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.
氟丙虫酰胺在中国已被登记用于防治鳞翅目和鞘翅目害虫，并广泛用于防治靶标害虫的致死和亚致死水平。本研究旨在探讨氟丙虫酰胺对鳞翅目代表性农业害虫斜纹夜蛾的亚致死和致死效应，以评估其对害虫的生态影响。
氟丙虫酰胺在 F 1 代对卵孵化率影响较小，但显著降低了初孵幼虫的存活率。氟丙虫酰胺对 3 龄幼虫和成虫的 48 h 半数致死浓度（LC ）分别为 0.13 mg·kg 和 3.59 mg·L。用亚致死剂量（LD 和 LD ）处理后，3-6 龄幼虫的历期和生殖雌虫的平均产卵量显著增加，但化蛹率、蛹重和世代历期显著降低。在 F 2 代，幼虫历期和加倍时间延长，而化蛹率和世代历期降低了 14.92%和 18.00%。亚致死组的内禀增长率（r m ）、周限增长率（λ）和净生殖率（R 0 ）均低于对照组。用 LD 和 LD 处理的 F 2 代的相对适合度分别为 0.81 和 0.66。
氟丙虫酰胺不仅具有很高的致死活性，而且还能抑制斜纹夜蛾种群的生长和繁殖，这是田间使用氟丙虫酰胺的指导原则的关键因素。
