对菊花根施 5 0 0 m L浓度为 2 5 0 mg/kg、 5 0 0 mg/kg、 75 0 mg/kg、 1 0 0 0 mg/kg、 1 2 5 0 mg/kg的PP33 3 ,结果表明 :菊花主、侧茎生长在低浓度范围内对 PP33 3 抑制作用敏感 ,在中高浓度范围内对 PP33 3 抑制作用敏感性减弱 ;5 0 0～ 75 0 mg/kg的 PP33 3 浓度范围对菊花侧枝分生能力有极显著的抑制作用 ;不同浓度的 PP33 3处理能不同程度提高菊花叶片叶绿素 ( a+b)、糖类、氨基酸总量、全多酚的含量 ,延迟菊花开花期 ,降低褐斑病病叶百分率。其中 5 0 0～ 75 0 mg/kg的 PP33 3 能使菊花叶片叶绿素 ( a+b)、糖类、氨基酸总量、全多酚的含量比对照依次提高 1 3.0 %～ 1 6.7%、 1 6.9%～ 2 2 .3%、 5 .1 %～ 7.8%、 2 1 .3%～ 2 7.9% ,病叶百分率降低 37.5 %～ 66.6% ,始花期延迟 9d,主茎长 33.90～ 35 .65 cm,侧茎长 2 5 .1～ 2 6.0 cm,平均分枝数 7.3～ 1 2 .3,使菊花综合观赏价值得到明显提高 The concentrations of PP33 3 at 250 mg / kg, 500 mg / kg, 75 0 mg / kg, 100 mg / kg and 125 mg / The results showed that the growth of main and lateral stems of chrysanthemum was sensitive to the inhibitory effect of PP33 3 at a low concentration range and the sensitivity of PP33 3 at medium and high concentration range was weakened. The range of PP33 3 concentration of 500-1075 mg / kg was Chrysanthemum lateral branch meristem has a very significant inhibitory effect; different concentrations of PP33 3 treatment can increase chrysanthemum leaves chlorophyll (a + b), carbohydrates, amino acids, total polyphenols content, delay chrysanthemum flowering stage, reduce Brown spot disease leaves percentage. The contents of chlorophyll (a + b), carbohydrates, total amino acids and total polyphenols in chrysanthemum leaves increased by 130.3% -1 6.7% and 1 6.9 The percentage of diseased leaves decreased by 37.5% ~ 66.6%, and the flowering period was delayed by 9 days. The main stem length was 33.90 ~ 35.65 cm , The stem length of 2.51 ~ 2.06 cm, the average number of branches 7.3 ~ 12.3, the chrysanthemum comprehensive ornamental value has been significantly improved