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桑白蚧又名桑白盾蚧、桃蚧壳虫,除为害花椒外,主要危害桃、杏、李等核果类果树。该虫以若虫和雌成虫聚集固定于枝干上刺吸为害,以2～3年生枝条受害最重,严重时整个枝条及树干被虫覆盖起来,远望呈灰白色。受害重的枝干发育不良,甚至整株枯死,严重影响花椒生产。 一、发生规律 据田间观察,该虫在陇南一年发生2～3代,以受精雌成虫在枝干上越冬。花椒树春芽萌动以后,越冬雌成虫出蛰,开始取食为害。并于4月中下旬产卵,卵产于雌蚧
Sang white scale also known as Sang white shield scale, Peach Scale pest insects, in addition to pepper, the main endanger peach, apricot, plum and other stone fruit trees. The insects nymphs and female adults gathered in the sticks on the stems of sucking damage, to 2 to 3-year-old branches of the most serious victims, the whole branch and the trunk was covered with insects, the distance was gray. Badly affected branches dysplasia, or even dead whole plant, seriously affecting the production of pepper. First, the occurrence of law According to field observations, the insects occurred in Longnan year 2 to 3 generations to fertilize female adults in the branches of the winter. After the spring bud of prickly ash tree, winter winged female adult sting, began to feed harm. And in mid-April to lay eggs, eggs produced in female scales