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敦煌为全国重点产棉县,1993年植棉近10万亩,占作物总面积40%以上。由于国家制定了一系列伏惠政策,极大地调动了棉农种棉的积极性,植棉面积扩大,产量提高,普遍采用地膜、密植和高肥水栽培技术,前期生长旺盛,到7月份伏蚜繁殖极快,虽经多次防治,棉蚜虫口密度仍继续上升,绝大部分棉田百株蚜量逾万头,多者达10余万头,棉株受
Dunhuang is a key cotton producing county in the country. In 1993, cotton planting was nearly 100,000 mu, accounting for more than 40% of the total crop area. As the country formulated a series of ambush policies, which greatly mobilized cotton farmers enthusiasm for cotton, cotton area expanded, increased production, the widespread use of plastic film, close planting and high fertility cultivation techniques, vigorous growth in early July to the aphid breeding pole Fast, despite repeated control, cotton aphid population density continues to rise, the vast majority of cotton aphid population of more than one hundred, more than 10 million, cotton plant by