中文摘要：

亚洲小车蝗（Oedaleus asiaticus B. 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,作为前锋聚集迁移成为蝗灾北移的主力军。因此,加强亚洲小车蝗聚集行为的研究,对于了解其爆发成灾机制具有重要的意义。我们在室内外首次对亚洲小车蝗是否存在聚集产卵行为进行研究,发现亚洲小车蝗喜欢选择已有卵囊和泡沫的产卵杯中产卵,而不喜欢在没有卵囊和泡沫的无卵杯中产卵,表明该蝗可利用挥发性气味区分有卵杯和无卵杯,并且可被其卵囊和泡沫挥发物吸引产卵。这些结果初步显示亚洲小车蝗存在聚集产卵的现象,卵囊及泡沫物质有可能是调控其产卵行为的信息化合物的来源。

英文摘要：

Oedaleus asiaticus B.-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 northward as a vanguard group in recent years.Therefore,studying the aggregation behavior of the grasshopper is crucial to explore the causes eliciting its outbreak.Here,we investigated whether the grasshopper O.asiaticus behaved in group oviposition both in the laboratory and in the field.The gravid females were found to oviposit preferentially in cups with eggs relative to in cups without eggs in a two-choice experiment.This suggests that the grasshoppers are able to use volatile cues to discriminate between cups with and without eggs,and can be attracted to oviposit by odours from egg pods and froth.These results preliminary showed that this species of grasshopper behaved in aggregative oviposition,and the egg pods and froth are possible sources of the primer pheromone mediating the ovipositing behavior of the grasshopper.