通过调查研究,找出洞庭湖区柑橘黑刺粉虱大暴发原因,并掌握了其发生规律和天敌种群情况。黑刺粉虱的天敌寄生率高,低龄幼虫期总寄生率30%～40%,中龄期60%～70%,高龄期90%～98%。防治上只要采取以保护天敌,良化橘园生态环境的综合管理措施,天敌即能抑制黑刺粉虱的发生为害。 Through investigation and research, find out the causes of the outbreak of citrus whitefly in the Dongting Lake area, and grasp the regularity and natural enemy populations. Blackfly whitefly natural parasitoids parasitism rate, low-age larvae of the total parasitism rate of 30% to 40%, mid-60% to 70%, advanced 90% to 98%. As long as the prevention and control measures to protect natural enemies, better orange ecological environment, integrated management measures, that is, natural enemies that can inhibit the occurrence of black thorn whitefly.