杨树主要枝干害虫的发生及防治
xiandai nongcun keji（2012）
Abstract
<正>1光肩星天牛1.1形态特征1.1.1成虫。体长20～35mm,雌成虫体大,雄成虫体型小。体黑色,有光泽,雄虫触角较长,雌虫较短,触角鞭状,触角除第一二节外,其余各节为蓝灰色,前胸两侧各有刺突1个,每个鞘翅上有大小不等的白斑数个。1.1.2卵。长椭圆形,乳白色,长5.5～7mm,临近孵化时变为黄色。1.1.3幼虫。初孵幼虫乳白色,取食后稍显淡红
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