油菜蚜虫流行规律与发生程度预测方法

THE EPIDEMIC LAW OF RAPE APHIDS AND FORECAST METHOD OF OCCURRENT DEGREE

油菜蚜虫发生程度年度之间差异大，它与夏季高温（日最高温度≥３３℃）日数（ＴＲ）成负相关；与９月份有翅成蚜迁飞量（ｘ）呈正相关；发生程度的预测模式为ｙ＝４．５２１９－０．１８５８（ＴＲ）＋０．００７７（ｘ）。

The rape aphis occurrence quantity had a large fluctuation among years. It had negative