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试验树为上屯良种场建山队的八年生红星苹果树,药剂久效磷是山东青岛农药厂制造的50%乳剂。涂药方法:在靠近第一主枝下部的主干上用板刷醮药剂原液绕干涂抹一周,宽度约2寸。六月十九日处理6株,当时新梢叶片布满苹果蚜虫,涂后三天蚜虫开始死亡,第七天全
The experimental tree is an 8-year-old Red Star apple tree built by the team of Shangtun good seed field. The drug monocrotophos is a 50% emulsion made by Shandong Pesticide Factory. Application method: in the main branch near the first branch of the main board brush 醮 agent liquid around the dry one week, about 2 inches in width. Six strains were processed on June 19 when the shoots of new shoots were covered with apple aphids and the aphids began to die three days after the coating. The seventh day