切实抓好科学用药控制第四代棉铃虫危害第四代棉铃虫是我省的主害代，也是控制其为害、保住当家桃的关键时期。据省植保总站预测，今年我省第四代棉铃虫为中等偏重发生，局部大发生。为了作好这一代棉铃虫的防治，要切实抓好科学用药。１选好对口农药品种各地在选用农药品... Effectively grasp the scientific control of the fourth generation of cotton bollworm endanger the fourth generation of cotton bollworm is the main harm generation in our province, but also control the damage, to maintain the prime minister of the critical period. According to the Provincial Plant Protection Bureau predicted that this year, the fourth generation of cotton bollworm in our province is moderately localized, large local occur. In order to make this generation of cotton bollworm prevention and control, we must earnestly grasp the scientific medication. 1 Select the right varieties of pesticides around the selection of pesticide products ...