枣粉蚧的发生与防治技术１发生规律枣粉蚧俗名树虱子。在沧州金丝小枣产区每年发生３代。以若虫在枣树的主干、主枝皮缝内越冬。翌年４月枣树发芽时，越冬若虫群集于枣股芽上刺吸为害。第１代枣粉蚧发生期在５月下旬～７月下旬，若虫孵化盛期为６月上旬。第２代发生期为７... Jujube mealybug occurrence and prevention technology 1 Occurrence rules Jujube mealybugs Common name tree lice. In Cangzhou jujube production areas occur 3 times a year. To nymphs in the jujube tree trunk, the main branches of the skin winter. Jujube trees in April the following year germinate, overwintering nymphs cluster jujube bud sucking on the damage. The first generation jujube mealybug occurs in late May ~ late July, nymph incubation peak for the early June. 2nd generation period is 7 ...