I. Symptoms When cucumbers are grown under protected cultivation conditions and in late-crop cultivation conditions, they often appear as curved melons, sharp-edged gourds, thin-shouldered melons, and large-diabloned melons. Sometimes bitter melons appear. Second, the cause 1, curved melon: more due to malnutrition, caused by thin plants, such as lack of light, temperature, water is not appropriate or caused by root damage, pests and diseases, large temperature difference between day and night, lack of light, low temperature and so easy to occur In some flowering ovary, they showed a curved state, which increased with the growth of young fruit. Curvature occurred in the first or last ear. In addition, female flowers and young fruit are deformed due to physical factors such as shading or clip lengths such as frame and stem. 2, sharp mouth melon and thigh melon: cucumber can also be fruit without pollination, and some can develop into normal fruit, and some form a sharp mouth melon, when the female flower pollination is not sufficient, pollination of the front end of the first expansion. Insufficient nutrients or uneven moisture will form a large belly tummy, and the fruit will be deformed due to high temperature. 3, thin waist melon: When the nutrient water supply is not normal, the reaction in the accumulation of assimilation material is not uniform, there will be thin waist melon, in addition, cucumber infection with scab or lack of boron, there will be deformed. 4, bitter melon: Some cucumbers appear bitter, is due to the accumulation of bitter pigment (CHO) in cucumber body too much, the production of excessive nitrogen fertilizer, phosphorus, potassium deficiency, it is prone to bitterness, cucumber nitrogen, phosphorus Potassium absorption basically follows the ratio of 5:2:6, otherwise it will cause unbalanced fertility, leggy, irregular fruiting or malformation, or balsam pear appearing on the lateral branch and weak branch, and the cell temperature is lower than 13°C. The absorption of nutrients in water is inhibited, too much depletion or malnutrition can also produce bitter melons. Excessive soil moisture forms “physiological droughtâ€. The bitterness of bitter is easy to enter into the fruit under dry conditions, the bitterness is hereditary, and the dark green leaves are bitter. many. Third, the prevention and treatment methods 1, found timely removal of malformed melon. 2, do a good job of temperature, humidity, light and moisture management. 3, the use of formula fertilization techniques, or spray spray Po. 4, planting varieties without bitterness. 5, pay attention to temperature management, to avoid the temperature below 13 °C or long-term higher than 30 °C, the humidity as stable as possible to avoid physiological drought.
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