The symptoms of malformed fruit and fruit deformity are the fruit's loss of its original shape. The fruit surface is convex or concave or sub-cucurbit-shaped. The stale fruit is a physiological ripe fruit with very small fruit, poor texture and hard texture. The occurrence of these symptoms is caused by poor growth of strawberry plants, insufficient supply of assimilation materials, or excessive results and loss of nutritional competitiveness. For example, when the flower bud differentiation of strawberry encounters a temperature of 25°C or more or 5°C or less, the differentiation of flower buds will be hindered and malformed flowers will be formed, which will lead to development of malformed fruit. In addition, the relative humidity in the greenhouse during the fruiting period is more than 85%. The anther is not easy to crack, and the ovary is not completely pollinated, which also deforms the fruit and causes malformed fruit. Prevention measures: (1) Selecting suitable varieties for cultivation in the protected area and cultivating quality and strong seedlings of the right age. (2) Appropriately control the fertilizer and water, and the nutrient elements should be properly matched, so as to prevent the nitrogen in the soil. In the amount of fertilizer to do neither shortage nor super, in order to fully meet the physiological needs of strawberry plant growth and development. (3) Through the means of controlling the facilities in the protected areas, the different requirements for temperature, light and humidity in the different growth periods of the grass poison are fully met. (4) Regular inspections, sparsely deformed fruit, and ossified fruit should be removed at any time. Second, the double-body fruit and the fruit of the cockscomb grow two fruit of the fruit of the weed on a handle, which is called a double-body fruit; more than three pieces of the fruit of the strawberry grow on a handle, which is the fruit of the cockscomb, also called the purse fruit. The above-mentioned causes of the above symptoms are temperature and light imbalance in the greenhouse, imbalance in the proportion of roots and caps, less formation of nutrients, increased secretion of growth hormone, abnormal flower bud differentiation caused by grass poisoning, disorganization of floral cell division, deformed buds, and flat stigma. Prevention measures: (1) Select early-maturing, anti-deformation strawberry varieties; (2) According to the physiological needs of strawberries in greenhouses in protected areas, in addition to supplying sufficient nitrogen, phosphorus, and potassium fertilizers, we must also optimize the supply of various trace elements; (3) During the differentiation period of strawberry flower buds, the illumination, temperature and humidity environment in the greenhouse are coordinated. Third, when the strawberry fruit breaks, there is a longitudinal crack in the surface of the fruit, which is called cracking fruit. The main cause of the above symptoms is the high temperature of the strawberry fruit during the expansion period. After the soil is dry, a large amount of water is poured, and the fruit cells absorb a large amount of water. Prevention measures: (1) For strawberry planted in the greenhouse of the protected area, sandy soil with good physicochemical properties and strong water retention and fertility retention should be selected.(2) Scientific irrigation should be conducted in the greenhouse, and irrigation should be conducted with less irrigation to prevent soil in the greenhouse. Drought and waterlogging; (3) Strengthen the cultivation and management of strawberries so that the contradictions in their growth results are reasonably coordinated; (4) Take care to prevent direct sunlight on the strawberry fruits in the greenhouse.
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