作　　者： ; ;

机构地区： 上海农学院园林环境科学系

出　　处： 《上海农学院学报》 1994年第1期35-41,共7页

摘　　要： 桔园束管食螨瓢虫ＳｔｅｔｈｏｒｕｓｃｈｅｎｇｉＳａＳｉｊｉ各虫态及种群空间分布的基本成份为个体群．个体间相互吸引；幼虫、蛹、种群呈聚集分布，成虫为均匀分布．幼虫、蛹的聚集由外界因素所致，而种群的聚集由外界因素和其自身的聚集行为所致．各虫态及种群的个体群大小随各自平均密度的增加而呈线性递增．此外，本文还讨论了种群的序贯抽样技术和最适理论抽样数． An investigation was made of spacial distribution pattern and sampling technique of Stethorus chengi SaSaji in citrus orchards.It was found that individual group was basic component of spacial distribution of all stages and populations of the ladybugs. There was positivc interrelation between averaged size of the groups and their averaged densitics. Spacial distribution for larvae, pupac and population of the beetle were aggregated, but for adult was even. External faetors were responsible for lavac and pupae aggregation; when the adult density was high, both external factors and aggregation behavours of the beetle were involved. In addition,sequential sampling techniques and optimum theoretical sampling quantities were discussed.

关 键 词： 束管食螨瓢虫 空间分布

领　　域： [农业科学] [农业科学]