在小地老虎的预测预报和采取的防治措施中,幼虫分龄是非常重要的。发现幼虫各龄的趾钩数目变化稳定,可以作为分龄的一个依据。通过饲养幼虫观察到每龄幼虫第三腹足的单只趾钩数目都有一定的范围:1龄为6个;2龄7～8个;3龄9～11个;4龄12～14个;5龄为15～17个;6龄18～21个。幼虫 In the small tiger forecast and prevention and control measures taken larvae age is very important. Found that the larvae toe hook number changes stable, can be used as a basis for age. The number of single toe hooks of the third gastropod of each instar larvae was observed by feeding larvae. The number of single toe hooks in each third instar larvae ranged from 6 to 1, ranging from 7 to 8 in 2 to 9 to 11 in 3rd to 12th to 14th 5 to 15 to 17, and 6 to 18 to 21. larva