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随着人们生产、生活水平的提高,几年来,河南省早春塑料大棚西瓜种植面积在逐年增加,仅中牟、内黄两县均在3万亩以上。但是由于塑料大棚特殊的环境条件,部分大棚西瓜病虫危害较重,加之化肥施用量高,西瓜产品的农药、硝酸盐残留
As people’s production and living standards improve, in recent years, the planting area of watermelon in early spring plastic shed in Henan Province has been increasing year by year. Only Zhongmu and Neihuang counties are above 30000 mu. However, due to the special plastic greenhouses environmental conditions, part of the greenhouse watermelon pests more serious, combined with the high chemical fertilizer, watermelon products, pesticides, nitrate residues