近十多年来,褐飞虱(Nilaparvata lugens Stl)在桂北成为了常发性的水稻害虫,它的发生往往具有暴发性。近几年来,我们在初步掌握褐飞虱在我地的季节性迁飞规律的基础上,对我县稻田褐飞虱的发生规律及其发生期的预测预报进行了研究,现将结果初报如下。 For more than a decade, Nilaparvata lugens Stl has become a perennial rice pest in northern Guangxi, and its occurrence is often violent. In recent years, based on the preliminary grasp of the regularity of brown planthopper migrating in our country, we have studied the regularity of the occurrence of brown planthopper and the forecast of its occurrence in our county. The results are as follows.