Li Pengfei, Wang Kunyan, Li Tailong, Ma Liqiang, Gou Changqing, Feng Hongzu
Key Laboratory of Integrated Pest Management (IPM) of Xinjiang Production and Construction Corps in Southern Xinjiang, Tarim University, Alar 843300, China.
Scientific Observing and Experimental Station of Crop Pests in Alar, Ministry of Agriculture, Tarim University, Alar 843300, China.
Insects. 2025 Aug 28;16(9):903. doi: 10.3390/insects16090903.
is a major pest of cotton, causing serious damage to cotton production. This study designed species-specific PCR detection primers for , established a detection system to identify DNA in the intestinal contents of predatory natural enemies, and investigated the control potential of four species' predatory natural enemies against . The results indicated that 826 predatory natural enemies were collected from cotton fields belonging to two classes, five orders, and twelve families. Among these, 9 species of insecta natural enemies accounted for 54.12% of the total number of predatory natural enemies collected, while 14 species of arachnida predatory natural enemies comprised 45.88%. Of the 806 natural enemies tested, 5.58% were found to be positive for , all of which were arachnid predators, specifically , , , and . The predation response of these four spider species to the fourth to fifth instar nymphs and adults of adhered to the Holling II model. The theoretical predation (/), daily maximum predation rate (/), and searching effect for the fourth to fifth instar nymphs and adults of of the four spider species were assessed. According to the results, the species can be ranked in terms of their predatory and searching efficiency as follows: > > > . Four species of spiders had the highest theoretical predation against nymphs, ranging from 23.71 to 60.86, and adults, ranging from 22.14 to 50.25. Therefore, these four spider species could be utilized for management. This study identified the main predatory natural enemies of and their pest control capabilities, providing a scientific basis for selecting and utilizing natural enemies in integrated pest management (IPM) strategies. This will help promote ecological and green pest control of in cotton-growing areas.
是棉花的主要害虫，对棉花生产造成严重损害。本研究设计了针对的种特异性PCR检测引物，建立了用于鉴定捕食性天敌肠道内容物中DNA的检测系统，并研究了四种捕食性天敌物种对的控制潜力。结果表明，从属于两个纲、五个目和十二个科的棉田中收集到826只捕食性天敌。其中，9种昆虫纲天敌占收集到的捕食性天敌总数的54.12%，而14种蛛形纲捕食性天敌占45.88%。在测试的806只天敌中，发现5.58%对呈阳性，均为蛛形纲捕食者，具体为、、、和。这四种蜘蛛物种对若虫四至五龄期和成虫的捕食反应符合Holling II模型。评估了这四种蜘蛛物种对若虫四至五龄期和成虫的理论捕食量（/）、每日最大捕食率（/）和搜寻效应。根据结果，按捕食和搜寻效率对这些物种进行排序如下：> > > 。四种蜘蛛对若虫的理论捕食量最高，范围为23.71至60.86，对成虫的理论捕食量范围为22.14至50.25。因此，这四种蜘蛛物种可用于的管理。本研究确定了的主要捕食性天敌及其害虫控制能力，为在有害生物综合治理（IPM）策略中选择和利用天敌提供了科学依据。这将有助于促进棉花种植区的生态和绿色害虫防治。
