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根据龙眼害虫群落内部物种的组成和数量，采用群落的几个参数进行分析和探讨群落内部的演替规律。结果表明，为害龙眼的害虫有31科67属76种。优势种有13种。每年3－9月是主要害虫发生为害高峰期，是生产中防治的重点。多样性指数以5、6月份最高（H’=3．75），2月份最低（H’=0．55）。害虫生物学特性、树龄、气候条件和生态环境等都是影响害虫群落结构的主要因子。
According to the composition and quantity of species in the longan pest community, several parameters of the community were used to analyze and discuss the internal succession rules of the community. The results showed that there are 76 families, 67 genera, 31 families for pests of harmful longan. There are 13 dominant species. From March to September of each year, it is the peak of pest damage and is the focus of prevention and control in production. The diversity index was highest in May and June (H ’= 3.75) and lowest in February (H’ = 0.55). Pest biological characteristics, age, climatic conditions and ecological environment are the main factors affecting the pest community structure.