It did not affect the weight and quality of fruit. There was no significant effcct on controlling preharvest drop with one spraying of 2,4-DPN (C_2H_2OH)_3 or 2,4-DPNa at the same time with the same concentration.

• 元帅在采前21天喷布一次20ppm2,4-DP,也显著的控制了采前落果,不影响单果重和果实品质,但同期喷布一次相同浓度的2,4-DPN(C_2H_2OH)_3或2,4-DPNa,则对控制采前落果无显著效果。