in the concentration of lOOOmg/L, it had 35.2% protction effect to the Pseudoperonospora cubensis(Berk et Curt.) Rostov in vivo test.

• 盆栽试验结果表明，在500mg/L剂量下，3一乙酞化一p一香树脂醇对黄瓜霜霉的防效为35，2%25。