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1984年3月3日,在试验园的桃树上,叶面喷施 PPG1721,浓度为0.25、100,200 PPm。1983年秋或1984年春土壤中施入 PP333和 EL500,在树干横断面积为6.4厘米~2,浓度分别为0,1/16、1/8、1/4克和每棵树0、1、2、4克。PP333试验设在平地果园。所有处理均用成龄桃树。在1984年夏季测定形态
On March 3, 1984, PPG1721 was sprayed on the peach trees in the test garden at a concentration of 0.25, 100, 200 PPm. In the autumn of 1983 or the spring of 1984, PP333 and EL500 were applied to the soil. The cross-sectional area of the trunk was 6.4 cm ~ 2 and the concentrations were 0, 1/16, 1/8, 1/4 g and 0, 1, 2, 4 grams. PP333 test set in the flat orchard. All processing are used peach tree. Morphology was measured in the summer of 1984