黑点蚧(Parlatoria zizyphus(Lucas))在我国各地柑桔产区均有发生。寄主植物除柑桔类外,尚有枣、椰子、月桂、槟榔、油棕、茶树等,是柑桔主要害虫之一。若虫和成虫常群集于叶和果实上为害,影响光合作用,严重时影响果实品质和外观。据报道,黑点蚧在浙江一年发生3代。在气温30℃,用氰酸气熏蒸(氰化钾1:硫酸1:水3),每立方尺用100—300克,熏蒸20—30分钟,雌蚧死亡率达 Parotidia zizyphus (Lucas) occurs in citrus growing areas all over China. Host plants in addition to citrus, there jujube, coconut, laurel, areca, oil palm, tea tree, citrus is one of the major pests. Nymphs and adults often cluster in leaves and fruit damage, affecting photosynthesis, serious impact on fruit quality and appearance. It is reported that black spot scales in Zhejiang occur three generations a year. At a temperature of 30 ° C, fumigation with cyanic acid gas (potassium cyanide 1: sulfuric acid 1: water 3), 100-300 grams per cubic foot, fumigation for 20-30 minutes, female caddy mortality of up to