节瓜蓟马空间分布图式研究

Study on the Spatial Distribution Pattern of Thripe palmi Karny

对节瓜蓟马（Ｔｈｉｒｐｓｐａｌｍｉｋａｒｍｙ）在节瓜上的空间分布状况进行了调查和分析，结果表明，该虫的空间分布型前期符合奈曼分布，后期符合负二项分布；其空间图式是聚集的，分布的基本成分是个体群；在节瓜不同叶位上分布差异显著，明显向心叶聚集；在瓜棚向光面与背光面虫口比例方面，均以向光面较多。

The spatiai distribution oattern of Thrips palmi Karny on Benincasa hispida were studi-etl.The results showed that,1.The spatial distribution of the insect pest on the plant early qrowth stage conformed toNeyman disribution and conformed to negative binonual distribution in later growth scage.2. The spatial pottern of the pest was an aguregative one and the basic component of distribu-tion was the colony.3.on the hoat plant, 40% the pest concentrated on the youngest leaf.The nembers of the pest on the leaves exposed to strong light were more than these in a poorlisht.