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桑天牛在黑龙港地区分布很广,危害甚重,主要为害桑、杨、柳、榆及其它部分果树,以榆树为最甚。当地群众叫它铁炮虫、倒树虫。成虫啃食树梢及树皮,幼虫蛀食树干木质部及髓部,严重影响树木生长,重者造成全株死亡。越冬的桑天牛幼虫,春季开始在树干及大枝内为害,必须在化蛹前这一有利时机及时除治以控制虫源,减少为害。 桑天牛幼虫在树干蛀的孔道内活动,用药困难,除治不便。经过几年的试验,我们初步摸到了一个较好的除治办法,取名扦插堵孔防治法。除治效果95%以上。
Morus alba in the distribution of a wide range of Heilonggang, is very harmful, mainly for mulberry, poplar, willow, elm and other parts of the fruit trees, elm is the worst. The local masses called it iron beetle, down tree worms. Adults bite tree bark and bark, larvae eaten tree stems and the Ministry of xylem, seriously affecting the growth of trees, severe cases of death caused by the whole plant. Wintering mulberry larvae, spring start in the trunk and large branches of harmful, must be in a timely manner before the pupation of the timely removal of governance in order to control insect sources and reduce damage. Morus alba larvae in the trunk of the tunnel activities, medication difficulties, in addition to rule inconvenience. After several years of testing, we initially touched a better cure, named cutting plugging prevention and control method. In addition to cure over 95%.