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白背飞虱Sogatella furcifera(Horvath)是目前水稻的主要害虫之一,研究此虫发生、猖獗的生态因素对综合治理水稻害虫具有重要意义。本文应用主分量分析(PCA)方法,分析1984年作者等在南京农业大学江浦实验农场的田间调查数据,探索白背飞虱种群系统的状态变量及影响种群数量的主要因子。田间调查于1984年7月至8月在两块单季杂交稻(汕优6号)田进行,3天查1次。方法参照[6];温度、雨量、相对湿度取自当地气象资料,为调查间隙3日平均值。将时间、长翅型雌、雄虫、短翅型雌和雄虫、卵、一至五龄若虫、蜘蛛、隐翅虫、步甲、
Sogatella furcifera (Horvath), a whitebacked planthopper, is currently one of the major pests in rice. It is of great significance to study the occurrence and the rampant ecological factors of this insect for the comprehensive management of rice pests. In this paper, principal component analysis (PCA) method was used to analyze field survey data such as the 1984 authors in Jiangpu Experimental Farm of Nanjing Agricultural University, to explore the state variables of whitebacked planthopper population system and the main factors affecting population size. Field surveys were conducted on two single-season hybrid rice (Shanyou 6) fields from July to August 1984, one check in three days. Method reference [6]; temperature, rainfall, relative humidity taken from the local meteorological data for the survey 3-day gap average. The winged female, male, short-winged female and male, egg, first to fifth instar nymph, spider, pest flies, carabiner,