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近几年来，随着种植业结构的调整，中粳稻在不少地区占较大比例。我市1997年中粳稻占水稻面积的93．3％，其病虫的发生和危害直接影响水稻高产稳产。为此，我们在调查分析中粳稻病虫发生特点的基础上，进行了药剂防治技术研究，现将结果报道如下：一、病虫发生特点据调查，中粳
In recent years, with the adjustment of planting structure, the proportion of middle-sized japonica rice in many areas accounts for a large proportion. In 1997, the city accounted for 93.3% of the total area of rice in China. The occurrence and damage of pests and diseases directly affected the high and stable yield of rice. Therefore, we conducted a study on the prevention and treatment of pesticides on the basis of the investigation of the pest and disease occurrence characteristics of japonica rice. The results are reported as follows: I. Characteristics of pests and diseases According to the survey,