Causes and Prevention of Cucumber Flowers topping

Cucumbers planted in cool seasons often exhibit flower topping phenomenon, which means that the top of the plant does not form the heart and the head of the flower appears. Topping the flowers not only delays the growth and development of the cucumber, but also affects its yield and quality. Therefore, we should promptly identify the reasons for symptomatic prevention and treatment. First, the reasons: 1. Burning roots topping: due to excessive application of organic fertilizers during planting or furrowing, and watering after planting is not timely, soil relative water content below 65%, high concentration of soil solution, resulting in root The rust color or withered tip makes the roots difficult to absorb and produce flower topping. 2. Toad rooting: When the ground temperature in the greenhouse is lower than 10°C and the soil relative water content is higher than 75%, the root growth of the cucumber is limited, resulting in rooting and thus flowering. 3. Because the night temperature is lower than 10 °C, it will lead to uneven foliage or shrunken, plant dwarf and appear dystrophic flower topping. 4. Wounded roots topping: There is a small amount of melon seedlings or plant roots damaged, long-term failure to restore, resulting in plant absorption of nutrients inhibited, the emergence of flowers topping. Second, the prevention and control methods: 1. For the burning of flowers caused by rooting, should be timely watering, so that the relative water content of the soil reached more than 65%, after the watering, timely cultivator. 2. For the rooting of the roots, the ground temperature of the greenhouse should be raised by 10°C or more. When it is found that the roots appear to be immersed in gray water, watering must be stopped, cultivating in time, and drying in the trenches when necessary. At the same time, remove the small melons and ensure the roots. When a new root grows, it can be turned into normal management. 3. Try to raise the night temperature for the flowers that are caused by the low night temperature. The temperature in the first half of the night is required to reach 15°C, and it can be kept at 10°C in the middle of the night. 4. To the top of the flowers caused by the root injury, to minimize the root injury when cultivating, in order to improve the vitality of the root.

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