摘要： 亚洲小车蝗(Oedaleus asiaticusB.Bienko)是我国北方草原和农牧交错地带最重要的优势种害虫之一,尤其近些年来亚洲小车蝗在各地起飞严重,作为前锋聚集迁移。试验采用EAG技术研究了亚洲小车蝗成虫对其雌成虫粪便挥发物的电生理反应。结果表明:雌成虫粪便挥发物单组分(1-羟基丙酮、2-甲基-2-丙烯醛、2,3-丁二酮、3-甲基丁醛及2-甲基丁醛)及其混合物对亚洲小车蝗成虫均具有电生理活性。在低浓度(≤1/1000原液浓度)时雄成虫对1-羟基丙酮、2,3-丁二酮的反应较雌成虫更为强烈,而且在低浓度时雄成虫对1-羟基丙酮的EAG反应值最高;随着浓度的增加,雌虫的反应增强,在1/100原液浓度时雌成虫对2-甲基-2-丙烯醛的反应明显强于雄成虫。雄成虫对全组分混合物的反应也是在低浓度时表现最为强烈。

关键词: 亚洲小车蝗, 雌成虫粪便, 挥发物, 电生理反应

Abstract: Oedaleus asiaticusB．-Bienko(Orthoptera: Acrididae),one of the most dominant grasshoppers on steppes and agriculture-animal husbandry ecotones in northern China，occurred seriously in many areas and migrated in swarm in recent years． Here，we studied the electrophysiological responses of male and female adults to volatiles from female adult feces by EAG bioassay． The results showed the main individual components of fecal volatile from female adults，1-Hydroxyaceton-e，2-methyl-2-Propena，2，3-Butanedione，2-methyl-Butanal，3-methyl-Butanal and synthetic blend of five components were all electrophysiological active to adult O． asiaticus． 1-Hydroxyaceton-e and 2，3 -Butanedione stimulated the male adults much stronger responses than the female ones with 1-Hydroxyacetone evoked the strongest responses from antennae of male adults at lower relative concentrations(≤1 /1 000) ; whereas 2- methyl-2-Propena evoked the female adults stronger responses at higher relative concentrations(1 /100) as a result of the response of female adults getting stronger with the concentration increasing． The synthetic blend of five components stimulated the strongest responses from antennae of male adults at lower concentration gradients．

Key words: Oedaleus asiaticusB． Bienko, Female adult feces, Volatiles, Electrophysiological response

中图分类号: 

• S433． 2