【摘要】 本文是有关螟卵啮小蜂产卵行为利它素研究的第一部份,报道了该利它素在寄主三化螟、白螟中的存在部位和抽提方法。 试验表明:刺激螟卵啮小蜂搜索寄主和产卵行为的利它素存在于寄主卵块的卵毛和雌蛾的尾毛之中,它能被丙酮—水(1∶1)溶剂所抽提,但不能被正己烷所抽提。当把白螟卵毛的丙酮—水抽提浓缩物滴加到纸质模拟卵上后,能引起雌蜂对模拟卵的触角敲打和产卵管插入。更多还原

【Abstract】 The present paper is the first part of the studies dealing with the chemical stimulant (kairomone) initiating oviposition behaviour of Tetrastichus schoenolii, an egg parasite of the yellow paddy borer, Tryporyza incertulas ("Walker). It demonstrates the location of the kairomone in Tryporyza, incertulas and Scirpophaga sp., and describes a method of extraction of the active ingredient from the host.The results demonstrate that the kairomone which elicits both the host-searching and oviposdtion behaviour by T. schoenobii female is located in both the hairs of host egg mass and the anal tuft of the female moth. The active ingredient was successfully extracted by acetone-water (1:1) solvent. However, it cannot be extracted by n-hexane. If acetone-water extract of the host egg-hairs was applied to a paper model egg, the model egg will elicit both the antennal drumming and inserting ovipositor of the parasite.更多还原