苹掌舟蛾越冬蛹在西南桦林的空间分布型  

Spatial distribution pattern of the overwintering pupae of Phalera flavescens in Betula alnoides forests

作　　者：陈顺秀[1] 庞正轰[2] 刘有莲[2] 吴龙敦 黄绍秋 

机构地区：[1]广西大学,广西南宁530004 [2]广西生态工程职业技术学院,广西柳州545004 [3]百色市老山林场,广西田林533301

出　　处：《中国森林病虫》2013年第5期20-24,共5页Forest Pest and Disease

基　　金：广西林业局"十五"科技项目"西南桦人工林丰产技术研究与示范"(桂林科字[2001]第80号)

摘　　要：为研究苹掌舟蛾Phaleraflavescens（Bremer et Grey）越冬蛹在西南桦Betula alnoides林中的空间分布格局，于2012年4月在广西百色市老山林场利周分场受苹掌舟蛾危害的西南桦人工林，随机抽取样树挖取距树基水平0～250cm、距地表垂直深度15．1cm以内的土壤调查苹掌舟蛾越冬蛹分布情况；采用6种聚集度指标和4种回归模型分析越冬蛹空间分布格局。结果表明：苹掌舟蛾越冬蛹在西南桦林中主要分布在距树主干基半径0～150cm、深度0—10cm的土层；离样树基部水平距离越近及离地表越近的土壤区间分布越冬蛹越多，反之则越少。以聚集分布为主，分布基本成分为个体群；昆虫本身聚集行为或与环境异质性共同作用、环境因素作用等均可能是其聚集原因。这为今后苹掌舟蛾在西南桦林中的预测预报及防治提供了一定的科学依据。In order to find out the spatial distribution pattern of the overwintering pupae of Phalera fla- vescens in Betula alnoides forest, the investigation was made in B. alnoides plantations infested with P. flavescens in Laoshan Forest Farm, Baise City, Guangxi in April,2012. Random sampling method was used to draw out the sample trees and investigate the distribution of the overwintering pupae in the area for about 0-250. 0 cm around the base of the sample tree＇ s bole and 15. 1 cm deep in the soil. Then 6 aggregation indices and 4 regression models were used to determine the spatial distribution of the pu- pae. The results showed the overwintering pupae mainly distributed in the area of 0-150. 0 cm around the base of the bole and 0-10. 0 cm deep in the soil layer,the closer to the base of the boles or the sur- face layer of the soil, the more overwintering pupae distributed. The aggregation pattern was the main pattern of overwintering pupae with individual colony as its component. The reason of aggregation may be the behavior of the insect, the effect of environmental heterogeneity and insect behavior or even the influence of environment factors. All these provided scientific basis for future forecast and control of P. flavescens in B. alnoides forests.

关 键 词：西南桦 苹掌舟蛾 越冬蛹 空间分布型 

分 类 号：S763.42[农业科学—森林保护学]