Be careful with cucumber "flower topping"
In the winter, the use of greenhouses, greenhouses and other protected areas to produce cucumber, often encounter cucumber "flower topping" phenomenon. The symptoms are: stagnation of the melon growth stagnation, tight integration of the tap, the growth point near the internode was shortened, that is close to the growing point of small leaves dense, each leafhopper appears small melon button, a large number of female flowers grow and open, resulting in capping. "Flower topping" has a great influence on the yield of cucumbers. If no effective measures are taken, it will often cause great losses. Below, introduce the cause of cucumber "flower topping" and its prevention and control methods.
First, the reason:
1, due to root burns. Due to excessive or insufficient organic fertilizer applied during planting, and watering after planting is not timely, the relative water content of the soil is lower than 65%, resulting in an excessively high concentration of soil solution, resulting in rust color or dead in the root tip, causing root absorption. Difficulties produce flower topping. 2, due to low temperature. When the ground temperature in the greenhouse is lower than 10°C and the soil relative water content is higher than 75%, the growth of the cucumber roots is limited, resulting in the roots of the roots and the appearance of the flower topping; or the night temperature below 10°C may cause the foliage Irregular or shrunken, the plants are dwarf and show dystrophic flowers topping. 3, due to injury. When a small amount of melon seedlings or plants are used in field operations, such as cultivating, planing, and watering, the roots are mechanically damaged and they fail to recover for a long period of time, causing the plants to absorb nutrients and inhibiting flowering. 4, due to fertilizer damage or injury. Excessive fertilization (especially superphosphate) or excessive spraying of pesticides can also cause heavier injury to cucumbers. 5. The soil is dry and fertilizer supply is insufficient.
Second, control methods:
1, add water and fertilizer. If the seedling stage is in a physiological drought state, it should be immediately watered and interlaced irrigation should be performed, ie, using a small amount of water to pour (to prevent flooding), under-membrane irrigation (conditional drip irrigation, sprinkler irrigation), and water seepage can be used. After light watering topdressing, timely cultivating loose soil to raise temperature can promote its germination of new leaves and turn into normal growth. 2, increase the temperature. If the greenhouse performance is not good, or long-term low temperature during the day, you should think of ways to increase the temperature required for seedling growth, can be attached to the light curtain, by increasing the thickness of the straw curtain, early cover grass curtain, evening fire or increase light and other methods to improve Temperature or extend the lighting time and other methods and measures to solve. 3, pick melon fruit thinning. According to the growing situation of cucumber, it can be grasped flexibly. Generally, the size of the plants on the plants can be completely removed, and the more robust plants can retain 1 to 2 melons. 4, spraying regulator. Use natural plant hormones (cloud 120), gibberellins, cytokinins and other plant growth promoters. Spray once every 7 to 10 days, and spray 2 to 4 times until the melon shoots return to normal growth. 5, remove the top flower melon, in order to promote root development and plant rejuvenation.
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