【摘要】 观察褐边绿刺蛾Parasa consocia Walker2个世代幼虫取食杨树叶片的习性。结果表明,第1代幼虫7龄,幼虫期平均取食量167.7cm2/头,取食持续时间26d;第2代幼虫8龄,幼虫期平均取食量170.5cm2/头,取食持续时间27d。2个世代末龄幼虫取食量最大,占整个取食量的80%左右,4~5龄幼虫是防治的关键龄期。更多还原

【Abstract】 Feeding behavior and feeding amount of Parasa consocia (Walker) on the leaves of Populus spp. were observed. The results showed that the larvae of the first and second generation of P. consocia had 7 and 8 instars, respectively. Average feeding amount per larva of the first and second generations was 167.71 cm2 and 170.49 cm2 respectively, and the feeding period was 26 days and 27 days, respectively. The feeding amount of the final instar larvae was about 80% of total amount. The 4th and 5th instar of larvae was critical stages for control.更多还原