爱豪虎蛾生物学的初步观察

爱豪虎蛾是乌蔹莓的重要食叶害虫,还为害葡萄.在南昌1年发生1代为主,部分2代,以蛹在寄主根际附近表土层的蛹室内越冬.各代蛹的滞育率不同,1代为75%左右,2代约为5%,个别2代蛹滞育时间长达654天,跨越两个冬季,成为3年1代.如此特殊的生活史,是鳞翅目昆虫生物学上所少见,也是它对复杂多变环境的一种适应对策.

A PRELIMINARY OBSERVATION ON THE BIOLOGY OF Scrobigera amatrix Westwood

Scrobigera amatrix Westwood,as well as a pest of grape(Vitis uinifera L.),is a majorleaf pest of Cayratia japonica(Thunb.)Gagnep.There is mainly one,partly two genera-tions per year in Nanchang,Jiangxi Province.It overwinters in pupa in the pupa-room inthe surface layer of soil near the root of the host plant.The ratios of the diapause pupae aredifferent with the generations:about 75 percent in the first generation,but only about 5percent in the second one.And occasionally the diapause period of one or two pupae of thesecond generation lasts 654 days-over two winters,or rathcr,one generation in three years.This peculiar life history is rare in the biology of Lepidoptera.And it is also a way for this pest to deal with the complex enviroment.