期刊
JOURNAL OF ASIA-PACIFIC ENTOMOLOGY
卷 23, 期 4, 页码 1023-1029出版社
KOREAN SOC APPLIED ENTOMOLOGY
DOI: 10.1016/j.aspen.2020.08.005
关键词
Coccinella septempunctata; Harmonia axyridis; Lady beetle attractants; Floral volatiles; Semiochemicals; Field trials
类别
资金
- National Key Research and Development Program of China [2017YFD0201000, 2017YFD0201805]
- National Natural Science Foundation of China [31872022]
- Zhejiang University Experimental Technology Research Project [SJS202013]
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, ahumulene, trans-3-hexen-1-ol, methyl salicylate, and beta-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) alpha-humulene: beta-pinene: methyl salicylate: trans-3-hexen-l-ol = 1:3:3:10; (5) alpha-humulene: beta-pinene: methyl salicylate:1-nonanal = 1:3:3:10; (8) alpha-humulene: beta-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.
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