麦长管蚜和禾谷缢管蚜对小麦挥发物的触角电位反应

采用活体蚜虫测定法，利用EAG技术比较分析了麦长管蚜Sitobion avenae和禾谷缢管蚜Rhopalosiphum padi有翅及无翅成蚜对小麦挥发物及麦蚜取食诱导挥发物组分的嗅觉反应，揭示了两种麦蚜的嗅觉变异特点。结果表明：麦长管蚜对水杨酸甲酯、反-2-己烯醛、反-2-己烯醇、-6-甲基-5-庚烯-2-酮和-6-甲基-5-庚烯-2醇的反应较强，禾谷缢管蚜对水杨酸甲酯、反-3-己烯乙酸酯、-6-甲基-5-庚烯-2-酮和-6-甲基-5-庚烯-2-醇的反应较强，并得到了剂量反应曲线。麦长管蚜的有翅和无翅成蚜对6-甲基-5-庚烯-2-酮、反-2-己烯醇和水杨酸甲酯的反应差异显著；禾谷缢管蚜的有翅和无翅成蚜对反-2-己烯醇、辛醛、里那醇、水杨酸甲酯和反-3-己烯乙酸酯的EAG反应差异显著，其原因与禾谷缢管蚜迁移及转主为害的生物学特性有关。

Electroantennogram responses of Sitobion avenae and Rhopalosiphum padi to wheat plant volatiles

The electroantennogram (EAG) responses of alate and apterous adult aphids of Sitobion avenae and Rhopalosiphum padi to wheat plant volatiles and volatiles induced by aphid feeding were analysed. Variation of olfactory responses was also analysed. EAG responses of S.avenae to methyl salicylate, E 2 hexenal, E 2 hexenol, 6 methyl 5 hepten 2 one, 6 methyl 5 hepten 2 ol, and R. padi to methyl salicylate, E 3 hexenyl acetate, 6 methyl 5 hepten 2 one, 6 methyl 5 hepten 2 ol were stronger. The EAG responses to 6 methyl 5 hepten 2 one, E 2 hexenol and methyl salicylate were significantly different between alate and apterous adult aphids of S. avenae. EAG reponses to E 2 hexenol, octanal, linalol, methyl salicylate, E 3 hexenyl acetate were also different between alate and apterous adult aphids of R. padi .