The main reason for the emergence of flower topping in greenhouse cucumbers:
Temperature misalignment type. In the early stage of planting and slowing down to the flowering and melon, if the continuous low temperature occurs, the vegetative growth of the plant is hindered, and the reproductive growth is too fast and the flower topping is prone to occur.
Roots and roots. High temperature and drought in the shed, especially when the soil is dry, due to excessive fertilizer, insufficient water, causing root burning, or the soil is too wet, but the temperature and ground temperature are low, causing the roots to be easily formed.
Water and fertilizer are not regulated. Soil conditions are uncomfortable, root activity is weak, and the ability of water-absorbing fertilizer is poor. Due to physiological deficiency, cucumber flower topping may also occur.
Control method: Reasonably regulate the temperature to prevent the temperature from being too low or too high, and maintain a suitable temperature. Timely cultivating loose soil plan to increase the ground temperature, if necessary, first apply appropriate amount of fertilizer, watering, and then loosen the soil to promote root development and lower tie. Scientific operation of fertilizer and water, greenhouse cucumber fertilizer application should be mastered in small quantities, multiple times, and uniformity. In particular, the applied organic fertilizer must be fully decomposed to prevent root damage due to improper fertilization. The amount and frequency of topdressing should be reduced as much as possible according to weather conditions. Watering in moderation to avoid flooding and flooding affects the ground temperature and causes roots. Strengthening the field management, the plants with flower topping have appeared, and the young and female flowers are removed in an appropriate amount, and the leaves are sprayed with 500 times of potassium dihydrogen phosphate. For flower topping caused by low temperature freezing damage, plant conditioners such as Bibao + alizarin can be sprayed to enhance the cold resistance of plants and promote root and plant development.
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