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Development of lady beetle attractants from floral volatiles and other semiochemicals for the biological control of aphids
Journal of Asia-Pacific Entomology ( IF 1.5 ) Pub Date : 2020-08-31 , DOI: 10.1016/j.aspen.2020.08.005
Jinhao Zhao , Zhongyan Wang , Zhongshan Li , Jiayu Shi , Ling Meng , Guorong Wang , Jingli Cheng , Yongjun Du

Aphids are among the most destructive phytophagous pests of host plants, because of their rapid reproduction, parthenogenesis, extensive crop damage, and the transmission of many plant viruses. Since lady beetles are important predatory natural enemies of aphids, developing lady beetle attractants to increase their field abundance is vital for aphid control. Floral volatiles and other semiochemicals are reportedly attractive to lady beetles. In this research, a total of 58 floral volatiles were tested by Y-tube olfactometer assays, among which 29 were highly attractive to both Harmonia axyridis (Coleoptera: Coccinellidae) and Coccinella septempunctata (Coleoptera: Coccinellidae). Meanwhile, the results of wind tunnel trials showed that only isoamyl acetate, α-humulene, trans-3-hexen-1-ol, methyl salicylate, and β-pinene lure these two species. Thereafter, 15 semiochemicals from pests, natural enemies, and pest-infested crops were mixed with the selected floral volatiles, to determine optimum formulations for attracting lady beetles through wind tunnels and further field trials. Eventually, formulas (1) α-humulene: β-pinene: methyl salicylate: trans-3-hexen-1-ol = 1:3:3:10; (5) α-humulene: β-pinene: methyl salicylate:1-nonanal = 1:3:3:10; (8) α-humulene: β-pinene: methyl salicylate: indole = 1:3:3:10 (1, 5, and 8 are labels used for the various formulations in field trials) were successfully verified to be attractive to lady beetles in both pumpkin and wheat fields. These formulations will be of great significance in developing integrated pest management strategies for aphid control.



中文翻译:

从花卉挥发物和其他化学信息素中开发甲虫瓢虫引诱剂,用于蚜虫的生物防治

蚜虫由于其快速繁殖,孤雌生殖,广泛的农作物损害以及许多植物病毒的传播而成为宿主植物中最具破坏性的植物吞噬性害虫之一。由于瓢虫是蚜虫的重要掠食性天敌,因此发展瓢虫引诱剂以增加其田间丰度对于控制蚜虫至关重要。据报道,花卉挥发物和其他化学信息素对瓢虫具有吸引力。在这项研究中,通过Y型管嗅觉测定仪测试了58种花香挥发物,其中29种对异色瓢虫(Coleoptera:Coccinellidae)和七星瓢虫Coccinella septempunctata)(Coleoptera:Coccinellidae)具有很高的吸引力。同时,风洞试验的结果表明,仅乙酸异戊酯,α-humulene,反式-3-hexen-1-ol,水杨酸甲酯和β - pine烯诱使这两个物种。此后,将15种来自害虫,天敌和受害植物的化学信息素与选定的花卉挥发物混合,以确定通过风洞和进一步田间试验吸引雌性甲虫的最佳配方。最终,式(1)为 α-腐殖烯:β - pine烯:水杨酸甲酯:反式-3-己烯-1-醇= 1:3:3:10;(5) α-腐殖烯:β - pine烯:水杨酸甲酯:1-壬醛= 1:3:3:10;(8) α-腐殖烯:β - pine烯:水杨酸甲酯:吲哚= 1:3:3:10(158是在田间试验中用于各种配方的标签)已成功验证对南瓜和小麦田中的甲虫都有吸引力。这些配方在开发用于防治蚜虫的综合害虫管理策略中将具有重要意义。

更新日期:2020-08-31
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