First, the temperature and humidity are not suitable. Low-temperature, high-temperature or high-humidity environments can easily cause malformation. When the weather is fine and the temperature is appropriate, the petals can be opened very early in the morning, and after a few hours, the medicine is opened and the pollen is exposed, during which pollination and fertilization are carried out. At low temperatures, the petals are not able to fully open and flip. The stamens are poorly prescribed and not easily fertilized. At the same time, when the air humidity is too high (above 80%), it will also affect pollination and fertilization, which is not good for anther cracking and pollen development.
The second is improper fertilization. Although the amount of fertilizer needed for strawberry growth is large, excessive application of basal fertilizer or excessive application of urea and other nitrogen fertilizers from flowering to flowering will promote the vigorous growth of strawberry vegetative buds. The differentiated flower buds have less buds and weaker buds. In many cases, the nutritional factors are out of balance, resulting in poor berry development and more malformed fruits.
The third is the light factor. Strawberry pollen is formed within 14 days before flowering. If there is insufficient light during this period, the pollen germination rate will be reduced, affecting fertilization and producing abnormal fruit.
The fourth is spray spraying. Spraying at the flowering stage of strawberry, liquid medicine will hinder pollen germination and pollinate insects, so that the proportion of abnormal fruit increased significantly.
The prevention and treatment of abnormal strawberry fruit should be based on prevention. In addition to the selection of good varieties, in the main cultivars mixed with some varieties with a large amount of pollen, it should also take corresponding measures for different reasons to reduce the chance of malformation.
First, we must scientifically formulate fertilization. Combine organic fertilizer with inorganic fertilizer, especially with appropriate proportion of phosphorus and potassium fertilizer, timely supplement calcium, boron and other elements, and control soil moisture, reduce the plant's ability to absorb fertilizer.
Second, we must regulate the humidity temperature. Strawberry is sensitive to temperature and humidity during flowering. When the relative humidity is about 40%, the anther cracking and germination rate are high. The temperature is in the range of 17°C to 35°C. It is beneficial to the activity and spread of pollen. Therefore, it is necessary to open the vent ventilation in due course. The humidity in the control room shall not exceed 40%; the minimum temperature shall not be less than 5°C, the maximum temperature shall not exceed 30°C, and the daytime shall be controlled at 25°C to 28°C. Also note that it is not easy to fill with water after flowering.
The third is to do a good job of related supporting measures and adopt supplementary pollination techniques. You can put a bee in the greenhouse to increase the probability of pollination. You can also pollinate artificially. Between 10 am and 3 pm every day, it is the peak of anther explosion, which uses artificial breeze to assist in pollination, such as people walking fast in the aisle, or Fan fan and so on.
The fourth is to use high-efficiency and low-toxicity pesticides, and it is forbidden to use drugs during flowering. Before the flowering of strawberries, the disease should be thoroughly controlled. After flowering, the diseased plants should be removed in a timely manner, and diseased leaves and inflorescences should be removed to control the spread of diseases and to prevent pests from flowering. If necessary prevention and control, aerosols may be used instead.
The fifth is to spend thin and thin fruit in time. The old leaves and ineffective axillary buds should be frequently removed, and the deformed young fruit with very abnormal shapes should be removed to improve the light conditions for normal birth of the strawberries and to facilitate the concentrated supply of nutrients and increase the fruit weight and fruit quality.
Ningbo DOKEE Medical Technology Co., Ltd. , https://www.dokeemedical.com