The most important reason for strawberry malformed fruit is insufficient pollination and fertilization during flowering. The fertilized part forms a seed, the fruit swells, and the unfertilized part does not form a seed, and the fruit does not swell, forming a bumpy deformed fruit, which loses commercial value. There are many reasons for insufficient fertilization and pollination. Due to poor management conditions, improper application of nitrogen fertilizer, poor differentiation and development of flower buds, and imperfect development of male and female organs, these are the internal factors that cause normal pollination and fertilization. The external environmental conditions are bad, and the flowering period is cooled or rained in the open field; in the protected area, the insulation performance of the facility is not good, the temperature in the flowering period is too low, and the shed cannot be ventilated in time, causing the temperature to be too high or even saturated; Under low temperature and high humidity, the anthers cannot crack, or they crack but the powder is poorly dispersed, or because of high humidity, the pollen grains swell and rupture, and normal pollination and fertilization cannot be carried out. Malformed fruits will be formed. The fruits formed in the later stage of the harvest will also cause deformed fruits or fruit to become small gingko fruits with no commercial value due to the deterioration of the plant's nutritional status, weaker growth, or too much remaining flowers.

Methods to prevent strawberry malformed fruit: 1. Strengthen fertilizer and water management at different stages of flower bud differentiation and development, especially correct application of nitrogen fertilizer, and accurately grasp the transplanting period, which can prevent or reduce the appearance of male and female unsound flowers; 2. Build a shed with good heat preservation performance, or correctly determine the time to start the heat preservation, so that the florescence greenhouse can be easily controlled within the range suitable for pollination and fertilization, and the temperature can be reduced by reducing the humidity in the shed through ventilation. It will not be too low; 3. Release bees during the flowering period and use bees or wall bees for pollination is an effective measure to reduce deformed fruits and increase yield; 4. Thinning flowers and fruits, removing secondary flowers in time, thinning diseased fruits and excessive Early whitening of small fruits and deformed fruits can ensure the growth and development of normal fruits and improve the quality of fruit products. 5. Use pesticides during the flowering and pollination period of strawberries, usually before 9 am or after 3 pm to increase the fertilization rate.

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