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近几年来 ,随着酥梨套袋技术的迅速普及 ,梨黄粉蚜为害日盛。为此 ,笔者 1999年选用了德国艾格福公司的 35%赛丹乳油进行梨黄粉蚜的防治试验。试验设在江苏省丰县李寨乡黑楼村 ,供试植株为 4 0年生砀山酥梨 ,树势一般 ,栽培密度 14株 6 6 6 7ｍ2 ,土壤为泡沙土 ,ｐＨ值 8 8
In recent years, with the rapid popularization of Pear bagging technology, pear aphid pear damage daily. For this reason, in 1999, I selected the 35% Saïdane EC from German Agfa company for the prevention and control test of pear yellow aphid. The experiment was conducted in Heilou Village, Lizhai Township, Fengxian County, Jiangsu Province. The tested plants were 40-year-old Dangshansu pear with average tree vigor and 14 planting density of 6 6 6 7m 2. The soil was sandy soil with pH value of 8 8