【摘要】 <正> 近几年来,利用颗粒体病毒防治菜粉蝶(Pieris rapae以下称菜青虫)幼虫的工作,在我国已取得了较好的进展(梁东瑞等,1979;河北省菜青虫颗粒体病毒研究协作组,1981)。病毒杀虫剂与化学杀虫剂的显著区别之一,是前者具有选择性,不直接杀伤天敌昆虫。为了明确颗粒体病毒防治菜青虫对寄生蜂种群的影响,以便进一步了解病毒治虫在保持生态平衡上的意义,我们对颗粒体病毒、微红绒茧蜂(Apanteles rubecula)、菜青虫的相互关系作了一些实验室研究,现报道初步结果如后。更多还原

【Abstract】 The granulosis virus (GV) does not attrack to the Parasite Apanteles rubecula. Ultrathin section of midgut, tracheal matrix, and fat body cells of parasite larvae from virus-infected hosts did not shown the presence of GV. Parasite larvae in hosts exposed to virus after parasitization completed their development before their hosts died of virus infection. The proportion of parasites which survived increased as the time between host parasitization and host virus exposure increased. The susceptibility of parasitezed host to GV were lower than the nonparasitezed one. Parasites which oviposited in virus-infected hosts can be transmitted of GV to the healthy hosts subsequently exposed to them. It is suggest that the GV can be transmitted by parasites in field populations of P. rapae.更多还原