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1月中下旬第1代苹果绵蚜若蚜开始活动,2月下旬~3月田间种群数量开始缓慢上升,6月下旬~7月中旬进入快速增长期,高峰期一直持续到11月份上旬,之后逐渐下降.全年呈现1个明显高峰期.全年各龄蚜均有发生,第1龄若蚜、第2龄若蚜、第3龄若蚜、第4龄若蚜和成蚜各自占全年总虫量的比例分别为6.92%,40.12%,22.9%,19.01%和11.05%.其中第2龄若蚜所占比例相对较高,第1龄若蚜较低.苹果绵蚜(X)对红富士(Y1)与金帅品种(Y2)的产量损失模型:Y1=80.3472-0.0488X,Y2=77.9892-0.073X.初步制定防治指标:7蚜群/株(红富士品种),11蚜群/株(金帅品种).
In the first and second half of the first generation of apple aphids, if the aphids started their activities, the number of field populations began to slowly increase from late February to March of the second half of the month. From late June to mid July, the number of aphids started to increase rapidly. The peak continued until early November. Gradually decreased.The whole year showed a clear peak.All aphids occurred throughout the year, the first instar aphid, the second instar aphid, the third instar aphid, the fourth instar aphid and aphid accounted for The total annual worm population was 6.92%, 40.12%, 22.9%, 19.01% and 11.05%, respectively, of which the second was higher than that of the first instar, The yield loss model of Y1 and Y2 was Y1 = 80.3472-0.0488X and Y2 = 77.9892-0.073X. The preliminary control index was: 7 aphids / plant (Red Fuji variety), 11 aphids Group / strain (Jin Shuai varieties).