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果树蛀干害虫,主要以幼虫蛀食果树枝干,引起树体长势衰弱,严重时造成被害枝干或全株枯死。因此,要加强防治。1天牛害虫主要有桑天牛、星天牛、桃红颈天牛三种。2～3年发生1代,危害木质部和髓心,被害部位表皮正常,每隔一定距离有一排粪孔,虫道直,红褐色虫粪排出堆积于地面。用棉花球蘸少许80%敌敌畏乳油或0.2g磷化铝制成毒签,塞入倒数第1或第2排粪孔内,并用湿泥将全部粪孔封死。磷化铝毒性很强,使用时一定要注意安全。
Fruit trees bore pests, the main larvae to eat fruit tree stems dry, causing the tree body weak growth, resulting in serious damage to the branches or whole plant withered. Therefore, we must strengthen prevention and control. 1 day pests mainly Sang Tian cattle, celastrus, pink neck cerambunus three. Occurred in 2 to 3 years a generation, endanger the xylem and pith, the damaged part of the normal epidermis, at regular intervals there is a row of manure holes, worm larvae, rufous pest excreted accumulation in the ground. Use a cotton ball dipped in a small amount of 80% dichlorvos EC or 0.2g of aluminum phosphate poisoning, into the penultimate fecal hole or hole, and use wet mud to seal all fecal holes. Aluminum phosphide is very toxic and must be safe to use.