苹果树环剥后伤口禁止涂药１９９４年我县部分果农为防治苹果树环剥后病虫侵染，用５０倍４０％的福美砷涂抹伤口，造成环剥后的伤口不能愈合而整株死亡的现象。这是因涂药破坏了伤口处的形成层，同时由于福美砷不仅烧坏伤口处的形成层，而且使伤口上下两端的韧皮部变褐干... After the peeling of apple trees, the wounds were not allowed to be applied. In 1994, part of the farmers in our county tried to control the pest and worm infection after peeling the apple trees with 50 times 40% of the arsenic and arsenic, which caused the whole wounds to die after being girdled The phenomenon. This is because the application of drug damage to the formation of the wound at the same time as arsenic not only burn the formation of wounds at the same time, but also the upper and lower ends of the phloem browning dry ...