荔枝螨类资源调查及丰富度分析

荔枝螨类的标本采集和田间调查结果表明,荔枝螨类有2目11科23属40种,其中叶螨科的冰草叶螨、竹裂爪螨,细须螨科的刘氏短须螨,长须螨科的细毛神蕊螨为广东新记录,大赤螨科的快捷大赤螨、柳大赤螨、Walzia aus-tralica Womersly为中国新记录;荔枝螨类群落的高发期基本上出现在9~11月,低发期一般出现在2~3月;益螨害螨比例最高一般出现在2~3月及7~8月,比例最低则出现在9~11月,其次为5~6月;叶螨科和植绥螨科为荔枝螨类的优势种群;荔枝螨类绝大多数科级类群为寡属及寡种的类群,具有相当高的多样性。

Resources investigation and richness analysis of Litchi mites

The results of specimen collection and field investigation on Litchi mites showed that it includes 2 order and 11 families and 23 genus and 40 species.Among those,Tertanychus agropyronus Wang,Schizotetranychus bambusae Reck,Brevipalpus Liwisi McGregor and Agistemus terminalis (Quayle) was Guangdong new records in,Anystis agilis L,A.salicinus L.,Walzia australica Womersley was Chinese new records.It also showed that the population number of mites on Litchi fruits is high from September to November while it is low from February to March.At the same time,the highest ratio of beneficial mites to harmful mites was found from February to March and from July to August,the lowest ratio of beneficial mites to harmful mites was found from September to November and then from April to May.Tetranychidae Donnadieu and Phytoseiidae Berlese are the dominant species of Litchi chinensis,the mites on Litchi chinensis was belong to oligo-genus or oligo-species too,and its diversity level is rather high.