Nowadays, cucumber is very popular in the market. In the anti-season, many farmers choose to grow cucumbers in greenhouses. However, many cucumber growers often encounter cucumbers in the process of growing cucumbers, and the growth points of cucumbers gradually shrink. Intensive tightness, the small melons appearing in each leafhopper are concentrated at the top, and the phenomenon of male and female flower clusters may also appear at the top. This phenomenon is called "flower topping", also called "melon topping". So what are the preventive measures and remedies for the topping of cucumber flowers? Cucumber flower topping is a common physiological disease on cucumbers in greenhouses, especially in autumn and winter and early spring, and there are many cases of flower topping. Therefore, if growers want to control the emergence of flower topping, we must first understand the reason why cucumber is prone to flower topping. First, the reason why the flower topping occurs in cucumber 1. The cucumber plants are short of water, the soil in the greenhouse is too dry, or the roots of the melon seedlings are poor and the development is not good. 2, fertilization is unreasonable, the application of non-fertilized organic fertilizer, or excessive application of chemical fertilizer, or a single application of fertilizer, are prone to flower topping. 3, the night temperature is low, the light is insufficient, in the nursery period or after planting, the temperature in the greenhouse for a long time at night is less than 10 degrees, plus the daily light is insufficient, the number of female flower buds formed is too much. 4. The variety of the melons is selected, and the varieties prepared by the females or the varieties with high female flower festivals (multiple knots) are selected. 5, blind use of ethephon, in the winter (early) spring 茬 cucumber seedlings, blindly using ethephon and other growth regulators, formed an excessive number of female flower buds. 6, the use of excessive control agent, in order to inhibit plant internodes too long, the use of chlormequat and other control agents, excessive inhibition of plant growth. Second, the prevention measures of cucumber flower topping 1, choose the appropriate variety Choose cucumber varieties suitable for local growth and strong disease resistance. 2. Strengthen the temperature and light management of the seedling stage From the seedling stage to the early stage of melon, the night temperature is controlled at about 12 degrees, the temperature difference is controlled at 10-15 degrees, and the daily light duration is not less than 7-8 hours. 3. Rational use of plant growth regulators Do not blindly use plant growth regulators such as ethephon, chlormequat, etc., even if the use must be controlled. 4. Scientific fertilization It is necessary to apply a fully decomposed organic fertilizer as a base fertilizer, and apply an appropriate amount of fertilizer along with water. 5, watering at the right time It is necessary to pour the planting water and the seedling water with warm water (in case the ground temperature drops). After entering the melon period, you should not be short of water, keep the soil dry and see the wet, and avoid flooding. 6. Strengthen the temperature and light management during the melon period After the cucumber enters the melon period, variable temperature management can be implemented. The daytime temperature is controlled at 25-30 degrees, the first half of the night is 17-18 degrees, and the second half of the night is about 12 degrees. Third, the remedy of cucumber flower topping After the flower topping occurs in cucumber, it is necessary to take remedial measures according to the induced cause. 1, timely watering and top dressing If it is due to lack of water or improper fertilization, you can pour water once, plow the soil in time, and pay attention to the wind. In the future, timely watering (nitrogen) fertilizer will promote the normal growth of the plants. 2, insulation and light If the night temperature or ground temperature is low, you can increase the night temperature insulation coverage or heating measures, clean the shed film, suspend the reflective curtain, expose the film to the soil and other measures to increase the temperature inside the shed. 3, early and slow melon Pick up the grown melons early. If there are many small melons (female flowers), it is necessary to remove some small melons. If the plant grows weak, all the small melons should be removed. cucumber 4, appropriate spray gibberellin It can be sprayed with 500 mg/kg gibberellin solution. Note that the concentration is lower when the temperature is low and lower when the temperature is high. For varieties with more female flowers, the concentration can be higher, but the solution concentration should not exceed 1000 mg / kg. The above are the symptoms of cucumber flowering and the prevention and remedial measures. In the process of planting cucumbers, farmers must prevent the occurrence of flower topping. If it happens, it should be remedied in time, otherwise it will reduce the yield of cucumber. And quality, I hope the above content can help cucumber growers. For the wonderful pictures and popular comments on the top of the cucumber flower, you may be interested in the following recommended content, welcome to read.
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