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根据湖南省历年稻飞虱测报资料,阐述稻飞虱在湖南省逐步加重,90年代大发生频率达80%,但地区间、年度间发生程度差异明显。分析影响1991~1997年全省稻飞虱发生程度的主要因子,外来虫源迁入时间早、虫量大,早稻期间气温偏高,晚稻期间盛夏不热、晚秋不凉有利发生。几年来,实施把稻飞虱作为水稻害虫防治的主攻对象,坚持从稻区生态系统整体出发,因地制宜地采取综合治理策略,取得了大面积控制为害,改善生态环境的效果。
According to the data of rice planthoppers reported in Hunan Province over the years, planthopper was gradually increased in Hunan Province, with a frequency of 80% occurring in the 1990s. However, there was a significant difference between the years and between years. The main factors influencing the occurrence of planthoppers in the whole province from 1991 to 1997 were analyzed. The migratory time of foreign insect sources was earlier, the amount of insect was larger, the temperature was higher during early rice, the summer was not hot during late rice, and the less favorable during late autumn. In the past few years, implementing planthoppers as the main target of pest control in rice fields has insisted on adopting a comprehensive management strategy based on the overall ecological system in paddy areas, and has achieved the effect of controlling a large area and improving the ecological environment.