问:柿子树每年在树干和果实上都有小白点,用手按有红色液体流出,是怎么回事?怎样防治?答:是柿棉蚧壳虫的危害,它在早期只危害叶片和枝条,柿树结果后,会爬到果实上危害果实。河南、山东等地每年发生4代,若虫在2、3年生枝条皮层裂 Q: Persimmon tree each year in the tree trunk and fruit have white spots, hand-pressed by a red liquid outflow, what is going on? How to prevent? A: It is the harm of cotton persimmon scale insects, which only endanger the leaves in the early and Branches, persimmon results, will climb to the fruit on the endangered fruit. Henan, Shandong and other places occur 4 generations a year, nymphs in 2-3 years branches cortex split