How to prevent cucumber melons
In the production of cucumber, the phenomenon of melon production occurs from time to time, resulting in a decline in yield and quality, affecting the economic benefits of vegetable farmers. To this end, vegetable farmers should understand the causes of morbidity, and take timely targeted measures to reduce the rate of chemical conversion.
First, the reasons for the occurrence of melon
The occurrence of cucumber melons is closely related to climate, cultivation and management. 1. Over dense planting causes melons. 2. The higher the night temperature, the more nitrogen fertilizer applied, the stronger the respiration of the plants, resulting in longer and more severe disease. Especially during flowering and fruit setting period, photosynthesis declines, and female flowers and young melon lack nutrients and cause melons. 3. The temperature regulation is irrational. Excessively high temperatures and low temperatures can cause melons to grow. 4. The lack of carbon dioxide in the shed creates pyruvate. 5 melon strip harvesting is not timely, affecting the balance of nutrient delivery to the young melon, especially when the root melon is not suitable for early picking, it is more likely to fall into the clams and melon. 6. Spraying unsuitable pesticides, spraying at too high a concentration, or being poisoned by harmful gases, causing normal physiological activities of the leaves to be destroyed, and functional leaf dryness caused by diseases and insect pests, etc. The nutrients produced by the plants cannot meet the needs of the squash When it happens, it turns into melons.
Second, preventive measures
1. Choose a good variety. Cucumber varieties should be selected from varieties with strong stress resistance and high disease resistance, such as Jinchun No. 3, Jinyou No. 3, Zhongnong No. 13 and so on.
2. Reasonably dense planting. Colonization using size, large row spacing 60 cm, small row spacing 40 cm, spacing 30 cm, in order to improve plant ventilation and light conditions, improve the utilization of light energy, enhance plant resistance.
3. Strengthen fertilizer and water regulation. After the planting, the seedlings were planted with water, and then they were no longer watered. Into the melon period, 5-7 days to pour a water, 10-15 days to chase a fertilizer, watering to shallow ground irrigation principle.
4. Adjust temperature and humidity to increase plant nutrition. Colonization to the seedling stage maintains a temperature of about 30°C during the day and about 18°C ​​at night, and the temperature is controlled between 25°C and 28°C during the day and 13°C-16°C during the night. Increase ventilation and reduce humidity after each watering. Using supplemental carbon dioxide or foliar spray of 1% glucose to promote assimilation can effectively prevent the occurrence of melliferous melon.
5. Improve the cultivation conditions. The dust on the film is often removed, and the condensation on the inner surface of the film is reduced by blowing air and other measures to prevent the refraction of light to increase the amount of transmitted light. In order to adjust the plant timely, when the cucumber begins to spread, it is strung and tied with knots. During the melon period, the old leaves, yellow leaves, excess male flowers and tendrils in the lower part of the plant were removed to reduce the ineffective consumption of nutrients, and the plants were evenly distributed and the photosynthetic efficiency was improved.
6. Harvest in time. To remove the root melon as soon as possible and timely harvest the melon that reaches the maturity of the commodity, in order to reduce unnecessary nutrient consumption. For unnatural melons, such as "Daligua melon" and "tip-melon melon" should be removed as soon as possible so as not to affect the growth of normal melons.
7. Comprehensive prevention and control of pests and diseases. In prevention and control, we must adhere to the principle of prevention and comprehensive prevention and control. Once onset, take effective measures, rational and scientific use of drugs, spray concentration should be appropriate, spray should be uniform, try not to spray on the flowers, so as not to affect the pollination and melon.
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