Cucumber bitterness is a kind of physiological disease, which is mainly due to the accumulation of bittersin in melon. The disease is affected by specific mild and humid microclimate, mainly concentrated in the early flowering root melons and late flowering melons. First, the cause of the disease 1. Variety. Choosing bitter melon as a seed, the offspring must be affected, generally dark-green varieties, with a heavy bitter taste. 2. Moisture. Root water control of improper drought, easy to form bitter melon. 3. Fertilizer. Cucumber nitrogen, phosphorus, potassium absorption ratio of 5:2:6, once the nitrogen fertilizer is high, or phosphorus, potassium fertilizer is insufficient, easily lead to leggy, in the side, weak branches appear bitter melon. 4. Temperature. When the ground temperature is lower than 12°C, the physiological activity of the cells is reduced, so that nutrient and moisture absorption are inhibited, resulting in bitter melons. If the temperature is higher than 32°C for a long time, the respiratory output is higher than that of photosynthetic products, and malnutrition may also lead to bitter taste. 5. The plants are weak. Insufficient illumination, injuring the roots, and infestation of fungi, bacteria, and viruses, or senescence of plant physiological functions at the late stages of development, can easily lead to bitter melons. Second, control methods 1. Choose good breeds. Try to avoid the use of dark green varieties, select the lighter varieties. 2. Remove the malformed melon with no commercial value in time. 3. Balanced fertilization, increase the application of decomposed organic fertilizer, add 50 kg of superphosphate per acre in the base fertilizer, promote the formula fertilization technology, follow the nitrogen: phosphorus: potassium = 5: 2: 6 ratio fertilization in the full flowering period, late fertility leaf Surface spray 0.3% potassium dihydrogen phosphate solution. 4. Avoid drought. When the temperature is high and there is less soil moisture, water it in time. 5. The control temperature in the appropriate range of cucumber growth, generally around 22 °C, to avoid the formation of temperature limits of bitterness. 6. Prevent injury. Injury will increase the bitterness of the cucumber, sowing the application of sand table sowing, seedlings to minimize root damage, cultivation should be as high as possible to cover the cultivation of high mulching film, when the land is slightly deeper early, later slightly shallow. Dental Instrument Series,Saliva Ejector,Dental Saliva Ejectors,Dental Material Ejector Ningbo Carest Medical Instrument Co.,ltd , https://www.carestmed.com