三化螟是我县主要害虫之一。据1976年—1986近十一年的统计,我县受病虫鼠害所造成损失的稻谷为111.5万担,其中三化螟造成的损失20.3万担,占总损失的18.2%。抓好三化螟第一代的防治,就能更主动更有效地预防全年各代的为害。研究早春四旬气候对第一代三化螟发生期和发生程度的影响,为今后测报及防治提供科学依据,有着现实意义.一、十一年(76—86)的历史资料及其分析:根据我们多年的观察,早春四旬的气温和降雨量是直接影响第一代三化螟发生期和发生程度的至关因子。从统计表1初步可以看出早春四旬温度高,三化螟发育进度加快,发生期 Borer is one of the major pests in our county. According to the statistics of the past 11 years from 1976 to 1986, there were 1,115,000 dansha paddy in our county suffering from pest, disease and pest rodent loss, of which 203,000 were lost due to the three borers, accounting for 18.2% of the total loss. Doing a good job in the prevention and treatment of the first generation of Borer, we can take the initiative to more effectively prevent all generations of the victims. It is of practical significance to study the effect of early-tecenthonic climate on the occurrence and occurrence of the first generation of rice stem borer (Borer, Chilo suppressalis (Walker)) and to provide a scientific basis for future reporting and prevention.According to the historical data of the first eleven years (76-86) and its analysis: According to our years of observation, the temperature and rainfall in the early spring are the critical factors that directly affect the occurrence and occurrence of the first generation of rice stem borer. It can be seen from the statistical table 1 that the temperature in early spring is higher than that in the late spring, and the progress of the development of the yellow borer is accelerated