Dong Fang, Chen Xin, Men Xingyuan, Li Zhuo, Kong Yujun, Yuan Yiyang, Ge Feng
Xinjiang Production and Construction Corps Key Laboratory of Special Fruits and Vegetables Cultivation Physiology and Germplasm Resources Utilization, College of Agriculture, Shihezi University, Shihezi 832003, China.
Institute of Plant Protection, Shandong Academy of Agricultural Sciences, Jinan 250100, China.
Insects. 2023 Aug 24;14(9):725. doi: 10.3390/insects14090725.
Osthole, the dominant bioactive constituent in the , has shown acute pesticidal activities. However, its detailed toxicity, antifeedant, and oviposition preference effects against agricultural pests have not been fully understood, limiting its practical use. This study aimed to investigate the contact toxicity, antifeedant activity, and oviposition preference of osthole against three agricultural pests (, , and ). Our results showed that the (L.) Cusson (CMC) has a high osthole content of 11.4 mg/g. Osthole exhibited a higher level of acute toxicity against the to four other coumarins found in CMC. It showed significant pesticidal activity against and first-instar nymphs and adults in a dose-dependent manner but not against adults. Osthole exposure reduced the fecundity and prolonged the developmental time of the and . Leaf choice bioassays revealed potent antifeedant activity in the and . Furthermore, the female showed a distinct preference for laying eggs in mango juice with 0.02 mg/mL osthole at 48 h, a preference that persisted at 96 h. These results provide valuable insights into the toxicity, repellent activity, and attractant activity of osthole, thereby providing valuable insights into its potential efficacy in pest control.
蛇床子素是[此处原文缺失相关植物名称]中的主要生物活性成分，已显示出急性杀虫活性。然而，其对农业害虫的详细毒性、拒食作用和产卵偏好效应尚未完全了解，这限制了其实际应用。本研究旨在探究蛇床子素对三种农业害虫（[此处原文缺失三种害虫的具体名称]）的接触毒性、拒食活性和产卵偏好。我们的结果表明，[此处原文缺失相关植物名称]（L.）库森（CMC）的蛇床子素含量很高，为11.4毫克/克。与CMC中发现的其他四种香豆素相比，蛇床子素对[此处原文缺失害虫名称]表现出更高水平的急性毒性。它对[此处原文缺失两种害虫名称]的一龄若虫和成虫表现出显著的杀虫活性，且呈剂量依赖性，但对[此处原文缺失害虫名称]成虫无此作用。接触蛇床子素会降低[此处原文缺失两种害虫名称]的繁殖力并延长其发育时间。叶片选择生物测定显示，[此处原文缺失两种害虫名称]具有很强的拒食活性。此外，雌性[此处原文缺失害虫名称]在48小时时明显偏好于在含有0.02毫克/毫升蛇床子素的芒果汁中产卵，这种偏好持续到96小时。这些结果为蛇床子素的毒性、驱避活性和引诱活性提供了有价值的见解，从而为其在害虫防治中的潜在功效提供了有价值的见解。
