Ji Yutong, Wang Mengqing, Xue Chuanzhen, Mao Jianjun, Li Yuyan, Zhang Lisheng
State Key Laboratory for Biology of Plant Diseases and Insect Pests, Key Laboratory of Natural Enemy Insects, Ministry of Agriculture and Rural Affairs, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
Insects. 2025 Apr 11;16(4):404. doi: 10.3390/insects16040404.
In integrated pest management (IPM), achieving a balance between biological and chemical control strategies is essential for effective pest control. Therefore, it is crucial to assess the impact of chemical pesticides on natural enemies. Neonicotinoid insecticides, particularly dinotefuran, are among the most widely used insecticides globally. This study investigated the acute toxicity of dinotefuran to adult predatory natural enemy and evaluated its effects on offspring growth and predation. The results showed that the 72 h median lethal concentrations (LC) of dinotefuran for female and male adults (F) were 0.624 mg/L and 0.592 mg/L, respectively. Exposure to LC concentrations of dinotefuran significantly reduced parental fecundity, longevity, and offspring growth and predatory ability. The most pronounced effects were observed when both female and male adults were exposed. Specifically, the pre-oviposition period was 2.64 times longer than in the control group, oviposition frequency dropped to 18.6%, total fecundity decreased to 13.4%, and the offspring emergence rate was reduced to 50% of the control group's level. Furthermore, predation efficacy of F generation (5th instar nymphs and adults) on and larvae reduced by 52.76% to 66.81%. Exposure of only female adults also led to significant but less severe effects on offspring, while male-only exposure showed the least impact. These findings highlighted the toxicological risks of dinotefuran to , impairing both reproductive and predatory functions, which could undermine biological control and affect the success of IPM strategies.
在综合虫害管理（IPM）中，在生物防治和化学防治策略之间取得平衡对于有效控制害虫至关重要。因此，评估化学农药对天敌的影响至关重要。新烟碱类杀虫剂，特别是呋虫胺，是全球使用最广泛的杀虫剂之一。本研究调查了呋虫胺对成年捕食性天敌的急性毒性，并评估了其对后代生长和捕食的影响。结果表明，呋虫胺对雌性和雄性成年天敌的72小时半数致死浓度（LC）分别为0.624毫克/升和0.592毫克/升。暴露于呋虫胺的LC浓度会显著降低亲代的繁殖力、寿命以及后代的生长和捕食能力。当雌性和雄性成年天敌都暴露时，观察到的影响最为明显。具体而言，产卵前期比对照组延长了2.64倍，产卵频率降至18.6%，总繁殖力降至13.4%，后代羽化率降至对照组水平的50%。此外，F代（5龄若虫和成虫）对[具体害虫名称1]和[具体害虫名称2]幼虫的捕食效率降低了52.76%至66.81%。仅暴露雌性成年天敌也会对后代产生显著但不太严重的影响，而仅暴露雄性成年天敌的影响最小。这些发现突出了呋虫胺对[天敌名称]的毒理学风险，损害了其生殖和捕食功能，这可能会破坏生物防治并影响IPM策略的成功实施。
