论文部分内容阅读
白背飞虱Sogatella furcifera(Horvath)是闽东山区水稻主要害虫之一。1961—1965年笔者曾作过一些调查研究,1970年以后又作了补充观察,现将所得资料整理如下。 一、垂直分布与田间消长 闽东地处亚热带,背山面海,地形复杂。海拔500米以上山区年平均气温约15.5℃,以种植单季稻为主。随着海拔高度和耕作制度的不同,白背飞虱的发生差异很大。经多年调查,并参考有关县病虫测报站资料,其垂直分布和田间消长情况,如表1、2。 从表1、2看出: 1.白背飞虱虫口密度随着海拔高度增高而加大,以海拔500米以上的山间盆地稻田分布较多。
Sogatella furcifera (Horvath) is one of the major rice pests in the mountainous areas of eastern Fujian. From 1961 to 1965, the author made some investigations and studies. After 1970, he made additional observations. The data obtained are now compiled as follows. First, the vertical distribution and growth and decline Fujian Mindong is located in the subtropical mountains, the sea, the terrain complex. The annual average temperature in mountainous areas above 500 meters above sea level is about 15.5 ℃, mainly for planting single-season rice. With the different altitude and farming system, the occurrence of whitebacked planthoppers varies greatly. After years of investigation, and with reference to the information about the county pest monitoring station, its vertical distribution and field growth and decline, as shown in Table 1,2. From Table 1 and 2, we can see that: 1. The population density of whitebacked planthopper was increased with the elevation above sea level, and more paddy fields were distributed in mountainous basins above 500 meters above sea level.