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一、概述水稻三化螟是我县水稻主要害虫之一,每年受害面积在4～7万亩,是影响水稻生产的一大障碍,以前对此虫预报,主要是以田间虫口密度调查为依据,作短期、中期预报,对长期于测研究很少.现利用我县20年资料数据,应用统计分析的方法和电子计算技术,进行三化螟长期预报,这样能及早掌握虫情,为防治工作做好准备.三化螟在我县每年发生五代,以第二、四代为害早、晚稻,影响三化螟种群变动的原因很复杂,如气候因素(温度、湿度、雨量、雨日、光照等)、食料(水稻品种布局、生育期、“桥梁田”等)、虫源基数(越冬后的有效虫源基数、死亡率等),这些
I. Overview Rice stem borer is one of the major rice pests in our county. Each year, the affected area is between 40,000 and 70,000 mu. It is a major obstacle to rice production. Previously, this insect pest forecast was based mainly on field pest population density surveys , For short-term, medium-term forecast, long-term in the measurement of research is very little now use my county 20 years of data, the application of statistical analysis methods and electronic computing technology for long-term forecast of Borer borer, which can grasp the early worms for the prevention and treatment Work in preparation for three generations of rice borer occurred in our county five generations a year, the second and fourth generations of early and late rice damage, the impact of the population change of the three borer is very complex, such as climate factors (temperature, humidity, rainfall, rain, Light, etc.), foodstuff (layout of rice varieties, growth period, “bridge field”, etc.), insect base (effective source of insects after winter, mortality, etc.)