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Comparison of Rhopalosiphum padi feeding behavior on seedlings of three wheat varieties
Author(s): 
Pages: 1105-1110
Year: Issue:  11
Journal: ACTA ENTOMOLOGICA SINICA

Keyword:  禾谷缢管蚜小麦取食行为抗性刺探电位图谱技术;
Abstract: 应用刺探电位图谱(EPG)技术对禾谷缢管蚜Rhopalosiphum padi在不同小麦品种(Ww2730、小偃22和Batis)苗期的取食行为进行了比较研究.结果表明:在小偃22上蚜虫开始取食的第1次刺探时间最晚,且持续时间最短;在Ww730上取食受到机械阻力的个体最多,且出现F波的几率和持续时间最长;两品种上蚜虫在木质部主动摄取汁液(G波)花费的时间最长.在Batis上,蚜虫口针第1次到达韧皮部时需要分泌较多水溶性唾液(E1波),但随后只需分泌较少的水溶性唾液就可以成功取食,而且被动吸食韧皮部汁液的时间(E2波)最长.蚜虫口针在到达小偃22韧皮部取食之前,出现多次的口针试探、回撤,并且多次、多量分泌水溶性唾液(E1波);虽然蚜虫在小偃22上口针最先到达韧皮部,但被动吸食韧皮部汁液的时间(E2波)最短.由此得出结论:小偃22表皮部、韧皮部存在阻碍禾谷缢管蚜取食的物理和生化因素;禾谷缢管蚜在Ww2730取食遇到更多的是细胞间机械阻力;Batis是较感蚜的品种.
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