黑纹粉蝶的生物学

BIOLOGY OF PIERIS MELETE MENETRIES

黑纹粉蝶PierismeleteMenetries是江西山区十字花科蔬菜上的重要害虫，目前只发现在萝卜、白菜和芥菜上为害，以幼虫取食叶片和荚果。该虫在江西一年发生2～4代，春季1代，以蛹越夏，秋季1～3代，以蛹越冬。由于越夏代成虫的羽化期和产卵期长，导致了世代重叠。雌虫寿命一般7～15d，每雌产卵量可达200粒；卵单产于叶片背面，卵期3～8d；幼虫期12～26d；非滞育的蛹期7～24d，越夏的蛹期104～178d，越冬的蛹期97～157d。

The cabbage worm, Pieris melete Menetries is a serious pest of crucifers in mountuin areas,Jiangxi Province. But it is only found to damage turnip,chinese cabbage and mustatd. The larvae feed primarily on the developing leaves and pods. It has 2 to 4 generations each year in Jiangal Province,one generation in spring,aestivating as pupa, one to three generations in autumn,overwintering as pupa. The generations of the butterfly greatly overlap due to the long aestival pupal period and the long ovipositional period of the female. An individual female generally has a life span of 7 t0 15 days and may produce as many as 200eggs. The eggs, deposited single on the underside of leaves hatch in 3 to 8 days. It has five larval instars and requires 12 to 26 days to complete larval development.A nondiapausing pupal period lasts 7 t0 24 days,104 to 178 days for aestivating pupae. 97 t0 157 days for overwintering pupae.