2014年上高县早稻主要病虫为害损失试验报告

本文对上高县2014年早稻纹枯病、稻瘟病、二化螟、稻纵卷叶螟和稻飞虱这几类水稻主要病虫害在防治与不防治条件下进行了田间试验对比，对不同处理病虫情况及产量情况进行调查，对防治效益进行了评估。结果表明，完全不防治产量损失最大，单一病虫害中纹枯病损失最大，其次是稻纵卷叶螟、稻飞虱、二化螟和稻瘟病；完全不防治的效益损失最大，单一病虫害中纹枯病损失效益最大，其次是稻纵卷叶螟、稻飞虱、二化螟和稻瘟病。2014年上半年雨水多，湿度大，造成纹枯病重发生，稻纵卷叶螟和稻飞虱中等发生，二化螟和稻瘟病轻发生。

Trial Report about Harm Loss of Early Rice from Diseases and Pests in Shanggao County in 2014

Rice sheath blight, rice blast, striped rice borer, rice leaf roller and rice plant hopper are the main diseases and pests of early rice in Shanggao County. In 2014, under the control and no-control conditions, field experiments were carried out to investigate situations of diseases and pests under different processing conditions, and to evaluate the prevention and control benefits. Results showed that the yield loss and loss benefits were the largest when under completely no-control condition, and rice sheath blight was the largest harm as a single plant disease or insect pest, followed by rice leaf roller, rice plant hopper, striped rice borer and rice blast. In the first half of this year, a lot of rain caused the heavy occurrence of sheath blight, and the leaf roller and rice plant hopper occurred in a mid-level scale, and striped rice borer and rice blast with light occurrence as well, which suggested that the loss of yield and benefits of diseases and insect pests were consistent with the occurrence of diseases and insect pests this year.