论文部分内容阅读
稻纵卷叶螟是重庆市秀山县水稻主要害虫之一,常年发生面广,为害严重。2008年,秀山县稻纵卷叶螟发生及为害明显出现不同的特点:发生早、虫量大、为害期长、田间虫态复杂、世代重叠严重、发生面广,为害严重。即三(2)代发生较上年及常年偏重,四(3)代为常年主害代,大发生频率高,2008年总体
Rice leaf roller is one of the major rice pests in Xiushan County, Chongqing City. In 2008, there were distinct characteristics of occurrence and damage of rice leaf roller in Xiushan County: early occurrence, large amount of insect, long period of damage, complex insect field in the field, serious overlap of generations, widespread occurrence and serious damage. That is, the occurrence of three (2) generations is more serious than that of the previous year and the perennial one, four (3) is the generation of perennial victims, and the frequency of occurrence is high. In 2008,