不同产地白蜡虫(Ericerus pela Chavannes)产卵期天敌的种类及其群落结构研究

白蜡虫雌虫产卵期是白蜡种虫生产的关键时期，在我国白蜡主产地区，选择有代表性的4个种虫产地，2个白蜡产地和4个虫蜡混产地，调查群落中白蜡虫天敌的物种组成和数量变化，并进行聚类分析和排序，在10个白蜡主产地内，共收集到各种天敌15种，分属于6科11属，各群落的物种组成变化较小，优势种为白蜡虫花翅跳小蜂Microterys ericeri Ishii、中华花翅跳小蜂M.sinicus Jiang、白蜡虫啮小蜂Tetrastichus kodaikanalensis Saraswat、白蜡蚧长角象Anthribus la-jievorus Chao和黑缘红瓢虫Chilocorus rubidus Hope。群落的优势集中指数较小，多样性指数和均匀性指数较高，群落相似性系数最高达97.46%，最低为75.92%。影响群落相似性的主要因子为白蜡产区不同、生态环境差异和优势种天敌的数量变化，根据聚类分析和排序，将10个不同产地白蜡虫天敌群落分为3类；第1类为种虫产地，优势种天敌发生和危害较轻；第2类为白蜡产地，白蜡虫天敌发生和危害极为严重，其种群数量为第1类的3.36倍，第3类虫蜡皆产，其天敌数量介于第1、2类之间，中华花翅跳小蜂种群数量在第1、3类群落中大致相等，第2类发生较较重，白蜡虫天敌的严重危害是造成蜡区不产种虫的主要原因之一。

The species and community structure of white wax insect natural enemy in different production area in the oviposition period

The oviposition period of white wax insect is the key period of white wax production.The species and numbers of its natural enemy were investigated in the 10 main production areas in the oviposition period of white wax insect.The results showed that there were 15 natural enemy species of white wax insect in the 10 communities.The dominants were \%Microterys ericeri\% Ishii.\%M.sinicus\% Jiang,\%Tetrastichus kodaikanalensis\% Saraswat,\%Anthribus lajievorus\% Chao and \%Chilocorus rubidus\% Hope.The aggregation index was relatively low in the 10 communities,but the diversity index and evennes index were high.The highest coefficient of community similarity was 97.46%,and the lowest coefficient was 75.92%.The main factors interfering with community similarity were the production area,ecological environment and different numbers of the dominants in different community.The 10 communities were divided into three groups by a systematic clustering analysis and two\|dimensional ordination.The first group is in the production area of the female white wax insect,the number of its natural enemy were relatively few.The second is in the production area of white wax,where the natural enemy number was much more than the first group.The third is in production area of both female white wax insect and white wax,the dominant natural enemy number was between the 1st and 2nd groups.The natural enemy harm of white wax insect is an important factor to cause that the white wax can not produce female seed insect.in some production areas.