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樟树是上海城市主要绿化树种之一,近年受樟丛螟Orthaga achatina Butler·为害,树叶常被吃光,残留枝梗。据调查该虫在江苏、浙江、江西等省的樟树上亦有发生,尚未见到为害其他树种。 一、形态特征 成虫:体长12mm,翅展23—30mm。前翅深棕色,中间有2条波纹状黄线;后翅棕灰色,头部和全身灰褐色。 卵:集中排列成鱼鳞状,褐色略带黄色。 幼虫:老熟幼虫体长20—23mm,全身
Cinnamomum camphora is one of the major tree species in urban Shanghai. In recent years, Cinnamomum camphora is damaged by Orthaga achatina Butler. The leaves are often eaten and the branches are still scarce. According to the investigation of the insect in Jiangsu, Zhejiang, Jiangxi and other provinces have also occurred camphor tree, yet to see the damage to other tree species. First, morphological characteristics Adult: body length 12mm, wingspan 23-30mm. The wings are dark brown with two corrugated yellow lines in the middle; hind wings brownish gray, head and body brown. Eggs: arranged in a fish scale, brown slightly yellow. Larvae: mature larvae body length 20-23mm, body