要弄清当地地下害虫的情况,需要依靠群众,广泛询问地下害虫的发生历史和严重情况;并选择代表性大的地点,深入调查种类、密度和为害严重程度等,这样双管齐下,就可以掌握地下害虫发生的全面情况,了解发生的区域和面积,以便有计划、有目的和有准备地进行防治工作。 To understand the situation of underground pests in the area, we need to rely on the masses to extensively inquire about the history and serious conditions of the occurrence of underground pests. We also select the representative sites to conduct in-depth surveys on species, density and the severity of the damage so that we can master the underground The overall situation of pests and the area and size of the area in which they occur, so that they can be planned, targeted and prepared for prevention and treatment.