龙眼园害虫群落结构与动态研究

研究结果表明，龙眼害虫群落包括8目38科62种，其中为害较严重的有10多种。荔枝蝽蟓、龙眼角颊木虱、荔枝蒂蛀虫、龙眼亥麦蛾、荔枝尖细蛾和三角新小卷蛾为害尤为严重，是龙眼害虫的关键物种。这些害虫直接影响龙眼的产量和质量，是生产上防治的重点。龙眼害虫群落的生物多样性指数全年变动范围为0．0919—2．2938，均匀度指数全年变动范围为0．0837—0．8273。总体上分析，龙眼害虫群落优势种的优势地位明显，生态优势度大，在药剂防治实践中，应该注意保护果园昆虫天敌和蜘蛛类等有益生物，保护果园生物多样性，达到害虫可持续控制目的。

The structure and dynamics of pest community in longan orchards

In the longan orchards pests belonging to 8 orders, 38 families and 62 species could be found. More than 10 species could cause significant loss especially Tessaratoma papillosa (Drury), Cornegenapsylla canarium Yang et Hi, Conopomorpha sinensis Bradley, Hypatima conganae Yang et Chen, C.litchiella Bradley and Olethreutes lencaspis Meyrick. So these 6 species were important for control. Throughout the year, the biodiversity index of the pest community was ranged from 0.0919 to 2.2938 and evenness index was from 0.0837 to 0.8273. On the whole, the superiority of the dominant species was significant. To obtain the sustainable control, while using pesticides protection of natural enemies and biodiversity should be taken into consideration.