Eggplant flowers for the complete flower, divided into long column flower (stigma longer than the stamens), in the column flower (stigma length and stamen level) and short column flower (stigma shorter than the stamens), long column flower fruiting rate is high, in the column flower of the nutritional conditions are good, pollination can be good fruiting, and the short column flower due to the incomplete development of fruiting is not possible. The causes of fruit drop are: first, poor environmental conditions, such as insufficient light, persistent low temperature, excessive humidity and the occurrence of certain pests and diseases; second, poor cultivation conditions, such as excessive density, poor ventilation, lack of fertilizer and drought, excessive rainfall, nutritional deficiencies and so on. Both of the above can cause poor flower bud differentiation, long column flowers less short column flowers and pollination and fertilization of poor, resulting in blossom and fruit drop.

The prevention and control methods are: in addition to controlling suitable environmental conditions in the cultivation, strengthen the fertilizer management, but also every 7 to 15 days combined with the spraying of spraying 1 time "Tenda 2116" to promote the development of the root system to improve the level of nutrients, and to take the hormone treatment method for prevention. In the morning of the day of eggplant flowering, the preparation of 20 ~ 30 mg / kg of 2,4-D with a brush to smear the calyx and flower stalks, or 30 ~ 50 mg / kg of anti-falling pigment dipping or spraying flowers. Or use Shennong tomato yield agent No. 2, 1 kg of water per bottle to dip flowers or spray flowers.