摘要
1999～2000年研究了上海地区危害樟树的樗蚕生活史和生活习性.该虫一年发生2代,以蛹越冬,翌年5月上旬羽化.雌雄成虫性比为1:1.06.樗蚕的一龄、二龄、三龄、四龄、五龄幼虫平均头壳宽分别为11.32±5.49,19.8±0.29,21.45±0.32,29.79±3.60,43.88±14.29mm.从室內药剂防治实验结果来看,使用化学农药见效快,幼虫取食30％乙酰甲胺磷2000倍喷雾叶后,第2d的死亡率达82.5％,取食20％杀灭菊脂2000倍喷雾叶后,第2天的死亡率达87.5％,取食5％氯氰菊脂1000倍喷雾叶后,第2天的死亡率达92.5％.使用生物农药,4天后效果逐渐显现,具有一定的持续效果.
The life-history and habits of Samia Cynthia walker er Felder infesting camphor tree have been studied during 1999-2000 in shanghai. It produced 2 generations annually, overwinterd in pupal stage and emerged in the early May of the following year. The sex ratio of female to male was 1 : 1. 06. The width of headcapsule for the each instar were 11. 32±5.49,19. 8±0. 29,21. 45±0. 32,29. 79±3. 6,43. 88±14. 29mm, respectively. The test result in laboratory showed that chemical insecticide is more effective than bio-insecticide. 82. 5% Larvea would die two days after eating the leaves sprayed with the dilute 30% acephate (1 : 2000), while 87. 5% and 92. 5% would die with the dilute 20% fenvalerate (1: 2000) and the dilute 5% cyoermethrin (1: 1000) , respectively. The bio-insecticides would be with better effect from four days after being used, but they produced sustaining effect which was useful to environment protection.
出处
《上海师范大学学报（自然科学版）》
2003年第4期82-85,共4页
Journal of Shanghai Normal University(Natural Sciences)
基金
上海市科技兴农攻关项目(农科攻字(2002)第4-4-4号)
关键词
樗蚕
樟树
生活史
防治
Samia Cynthia walker er Felder
camphor tree
life history
prevent
