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冬季低温寡照易造成棚室内病害加重 ,菜农在防病时 ,多采用烟雾剂薰蒸防治。但是 ,如果使用量不准确、使用方法不当 ,会产生药害 ,轻则减产 ,重则造成绝收 ,给菜农带来不可弥补的损失。使用烟雾剂应注意以下几个方面。1 使用量一般说明书只按菜棚的面积定用量 ,而保护地空间大
Low temperatures in winter can easily lead to indoor greenhouse disease worse, farmers in disease prevention, the use of aerosol fumigation control. However, if the amount of use is not accurate, improper use of methods will produce phytotoxicity, ranging from reduced production, but will result in absolute harvest, to bring irreparable damage to farmers. The use of aerosol should pay attention to the following aspects. 1 amount of general instructions according to the area of the canteen set amount, and the protection of space