A preliminary study of biological characteristics in Pardosa astrigera

The Pardosa astrigera is one kind of widely distributed spider that has high population in shanxi province.The pardosa astrigera can catch and eat destructive insects for the agriculture.It can have two generations a year.The first generation is from the beginning of April to that of July;the second is from the end of July to the beginning of April of the next year.A generation last about 88.3 days,but the overwintering generation last about 250 days.The adult and juvenile safoly can pass through the winter.The temperature is in 20-30℃ during the studiums of the Pardosa astrigera,time shortens as the temperature increases. It can have two generations a year.The first generation is from the beginning of April to that of July;the second is from the end of July to the beginning of April of the next year.A generation last about 88.3 days,but the overwintering generation last about 250 days.The adult and juvenile safoly can pass through the winter.The temperature is in 20-30℃ during the studiums of the Pardosa astrigera,time shortens as the temperature increases.