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双条杉天牛双条杉天牛,属鞘翅目、天牛科,分布广。1.危害情况:幼虫在韧皮部蛀成螺旋式或纵横交错的扁圆形不规则坑道。老熟幼虫蛀入木质部,导致桧柏长势衰弱、整株枯死。2.形态特征:成虫体长7至28毫米,黑褐色或棕色。卵长椭圆形2至3毫米,白色,长椭圆形。老熟幼虫体长18至35毫米,圆筒形,体乳白色,头黄褐色,无足。蛹长15至25毫米,淡黄色。3.生活习性:双条杉天牛1年发生1代。越冬成虫于3月底羽化,4月上旬成虫交尾后,白天
Double cedar Cane Double Cedar, Coleoptera, Cerambycidae, widely distributed. 1. Hazard: larvae in the phloem moth into a spiral or criss-cross the irregular round irregular tunnel. Mature larvae eroded the xylem, leading to the weakening of cypress, the whole plant dead. Morphological characteristics: Adult body length of 7 to 28 mm, dark brown or brown. Egg long oval 2 to 3 mm, white, oblong. Mature larvae body length 18 to 35 mm, cylindrical, body milk white, brown head, footless. Pupae 15 to 25 mm, light yellow. 3. Habits: Double cedar day 1 occurred in 1 generation. Overwintering adult emergence at the end of March, early April adult mating, during the day