无忧花茸毒蛾的生物学习性

无忧花茸毒蛾（Ｄａｓｙｃｈｉｒａ ｈｏｒｓｆｉｅｌｄｉ　Ｓａｕｎｄｅｒｓ）在山东１年发生３代，以蛹越冬。翌年４月中、下旬成虫羽化、产卵，幼虫６～７龄，一生可食泡桐叶片１～２．６片（２５０－６５０ｃｍ~２）。各虫态历期分别为：卵１０～２２天；幼虫２５～５０天；蛹８～１５天（越冬蛹１６０－１８０天）。其生长发育受寄主植物，空气温、湿度的影响，种群数量的消长则受天敌、降雨和冬季低温的制约。防治可采用在树干基部打孔注入内吸农药，既不伤害天敌，也可减少对环境的污染。

Bionomics of Dssychira horsfieldi Saunders.

There are 3 generations for Dasychira horsfieldi Saunders in a year, it overtvineers in chrysalis. Then imago emergences and lays eggs during middle and late April next year. Its larvae last 6 - 7 instars, eating l-2.6(250- 650cm~2 ) paulownia leaf in the life.The durations of different states of the insect are: eggs 10 - 22 days,larva 25 - 50 days, chrysalis 8 - 15 days (over winter 160-180 days). Its growth and development is effected by parasitic plants, air temperture and huminity, and the its community is influenced by natural enemy, rainfall and low temperature in winter.The control method feasihle is to insert inter-absorb chemicals in the hole around trunk basea ,which does not hurt natural enemy,and reduces pollution to environment.