摘要
2001—2003年研究了上海地区为害樟树的栗叶瘤丛螟的生物学特性。该虫在上海1 a发生2代,以老熟幼虫越冬,1龄、2龄、3龄、4龄、5龄幼虫平均头壳宽分别为0.036±0.004 mm、0.062±0.014 mm、0.119±0.001 6 mm、0.173±0.014 mm、0.233±0.018 mm。幼虫食叶量约为39.09 cm2。初孵幼虫群集吐丝缀叶,在调查地区为害率达90%以上。
Orthaga achatina has 2 generations a year and overwinters as mature larva in Shanghai. The larvae＇s head capsules of the lst-5th instars were 0. 036 ± 0.004,0.062 ± 0.014,0.119 ± 0.001 6, 0.173 ± 0.014 and 0.233 ± 0.018 mm in width. The total defoliating amount of one larva was 39.09 cm^2. The early-hatched larva had congregating characteristics. The percentage of the infested camphor tree was 90 % in the investigated area.
出处
《中国森林病虫》
北大核心
2005年第5期13-14,共2页
Forest Pest and Disease
基金
上海市科技兴农攻关项目(农科攻字(2002)第4-4-4号)
