论文部分内容阅读
豚草条纹叶(虫甲)在北京地区年发生3代,以成虫入土越冬。越冬成虫于4月底至5月上出土活动。1、2、3代成虫分别于6月中下、7月下至8月初和9上中旬羽化出土。在26±1℃恒温条件下,雌雄成虫的寿命为82.5和67.8天。产卵前期16.5天,产卵期49.1天,一生产卵394.5粒。成虫一般仅在产卵后第30天前后出现一次明显的产卵高峰。卵、幼虫、蛹的发育历期分别为5.0、13.9和12.9天,在保温条件下,卵的孵化率最高,达92％。幼虫和蛹的存活率在16±1℃、26±1℃恒温及20～27℃室温条件下,差异不明显,最高78％,最低66.7％。
Ragweed striped leaves (pest) occurred in Beijing in the third generation, with adult adults into the soil overwintering. Overwintering adults unearthed in late April to May. 1,2,3 generations of adults were in June, respectively, from July to early August and mid-9 emerge. Under the condition of 26 ± 1 ℃ constant temperature, the male and female adult life span is 82.5 and 67.8 days. 16.5 days before spawning, spawning period of 49.1 days, 394.5 spawning eggs. Adults generally show a significant spawning peak around day 30 after spawning. The developmental durations of eggs, larvae and pupae were 5.0, 13.9 and 12.9 days, respectively. Under the incubation conditions, the hatching rate of eggs was the highest (92%). The survival rate of larvae and pupae was 16 ± 1 ℃, 26 ± 1 ℃ and 20 ~ 27 ℃ room temperature, the difference was not significant, the highest 78%, the lowest 66.7%.