栗瘿蜂在板栗林的分布及抽样技术  

The spatial distribution of chestnut gall wasp and its sampling techniques in the chestnut plantation

作　　者：李奕震[1] 易叶华[2] 郑柱龙[1] 谢治芳[1] 

机构地区：[1]华南农业大学林学院,广东广州510642 [2]江门市林业局,广东江门529000

出　　处：《华南农业大学学报》2004年第1期62-65,共4页Journal of South China Agricultural University

基　　金：广东省科技厅重点攻关项目"板栗绿色食品生产技术研究"的部分内容(C20211)

摘　　要：对板栗Castaneamollissima林的系统调查结果表明:栗瘿蜂Dryocosmuskuriphilus虫口密度随板栗林龄的递增而逐渐上升.间种了农作物的板栗林的栗瘿蜂虫口密度较低.在任何虫口密度下,栗瘿蜂在林间均为聚集分布,分布的基本成分是个体群,其聚集度随着种群密度的升高而增大.栗瘿蜂虫口密度在单株树树冠的东南西北4个方向之间无显著差异,而在内外层或上下层之间存在极显著差异.双对角线、单对角线、平行线和简单随机抽样方法均可作为栗瘿蜂虫口数量的调查方法.采用Iwao方法求出了最适抽样数和列出了序贯抽样表.The chestnut (Castanea mollissima) plantation was surveyed systematically. The results showed that the population density of chestnut gall wasp (Dryocomus kuriphilus) increased while chestnut trees grew from 1 to 6 years gradually. Compared with no intercropping treatment, the chestnut plantation intercropped with earthnut, corn and soybean had the lowest gall rate by the chestnut gall wasp.The distribution of chestnut gall wasp was the aggregated distribution patten and its basic component was individual colony in a chestnut plantation.The higher the population density of chestnut gall wasp ,the higher its aggregated degree in the chestnut plantation was.In the same crown level,the population density of chestnut gall wasp was not different significantly in the orientation of eastern,southern,western and northern branches of the trees. The population density was significantly different between inner and outer or upper and lower crown layers. The sampling methods,including intersecting diagonal,diagonal,parallel and random sampling were suitable to study chestnut gall wasp. The optimum sampling number and sequential sampling table were obstained by Iwao's method.

关 键 词：栗瘿蜂 板栗林 区域分布 抽样技术 

分 类 号：S436.64[农业科学—农业昆虫与害虫防治]