有些苹果品种有采前落果的特性,如元帅系及其短枝型品种、红玉、津轻等落果率可达30％～40％,严重影响苹果的产量和品质。落果的原因是果柄基部提前形成离层,可采取以下措施防止。 1.喷萘乙酸或茶乙酸钠 在采前40天和20天各喷一次20～40× Some apple varieties have the characteristics of picking and falling before the fruit, such as the Marshal Department and its spur varieties, red jade, light and so on the rate of fruit drop of 30% to 40%, seriously affecting the yield and quality of apples. The reason for falling fruit is that the base of the stalk is formed in advance, and the following measures can be taken to prevent it. 1 spray naphthalene acetic acid or sodium acetate in the mining 40 days and 20 days each spray once 20 ~ 40 ×