一、山区及半山区冬季灭虫,是消 灭马铃薯瓢虫的好时机 马铃薯瓢虫,是我国华北及东北等地区马铃薯、茄子、黄瓜、菜豆、辣椒及烟草等数十种作物的大害虫。解放前马铃薯瓢虫大发生年,大片作物受害失收,以致毁种。解放后采取有效防治,大大减轻了为害。 马铃薯瓢虫以成虫在山区及半山区的背风向阳 I. Winter pest control in mountainous and semi-mountainous areas is a good time to eliminate potato ladybugs. It is a large pest of dozens of crops such as potatoes, eggplants, cucumbers, beans, peppers and tobacco in north China and northeast China. Before the liberation of potato ladybug occurred in large, crop damage lost, resulting in deforestation. After the liberation to take effective prevention and control, greatly reducing the harm. Potato ladybugs to leeward adults in the mountains and Mid-Levels leeward