南京地区黑纹粉蝶生物学特性研究

[目的]全面了解南京地区黑纹粉蝶各虫态形态特征及其生活习性。[方法]通过生境调查和室内饲养观察研究黑纹粉蝶卵的孵化情况,幼虫的取食行为及幼虫的历期,幼虫的危害特点,化蛹的部位,成虫的习性等。[结果]生境调查和室内饲养表明,黑纹粉蝶在南京地区1年2~3代,以蛹在枯枝落叶中越冬,成虫3月下旬始见,幼虫共5龄。在室内饲养的条件下,卵期为4~5 d,幼虫期为12~15 d,蛹期约为9 d,世代重叠严重。其寄主为油菜、白菜、甘蓝、芥菜、萝卜等十字花科植物。幼虫以花蕾,叶片为食。[结论]黑纹粉蝶的取食量在3龄幼虫期加大,应在该阶段加强对黑纹粉蝶的危害防治工作。

Study on Biological Characteristics of Pieris melete(Lepidoptera:Pieridae)in Nanjing Area

[Objective] The aim was to understand the morphological characteristics of each life stage of Pieris melete in Nanjing area and its life habit.[Method] The hatching condition of the eggs,the feeding behavior,the duration and damage characteristics of the larvae,the pupation position and the habit of adult of P.melete were studied by the habitat investigation and the laboratorial rearing observation.[Result] The habitat investigation and the laboratorial rearing results showed that P.melete had 2-3 generations for 1 year in Nanjing area,the pupa overwinterred in the litter,the adults were detected in the last ten days of March and the larva had 5 instars.Under the laboratorial rearing condition,its egg stage,larvae stage and pupal stage were 4-5 d,12-15 d and 9 d,resp and its overlapping generations was serious.Its main host plants were Cruciferae plants such as Brassica napus,Brassica campestris,Brassica oleracea,Brassica juncea and Raphanus sativus.The larvae fed on buds and leaves.[Conclusion] The feeding amount of P.melete was increased in the 3rd larvae stage and the control work for the damage of P.melete should be strengthened on this stage.