Some cucumber growers will blindly increase the amount of pods and leave them in order to obtain high yields. This “predatory†plant nutrients, resulting in the general growth of cucumber in the late growth period is weak, leaves yellow, melon strips become shorter, the melon parts The phenomenon of “resting†of melons when they were moved or severed. If you do not strengthen management, the loss is quite serious.
One, the reason why cucumbers “restâ€
1. Too much melon. In order to increase the output, the farmers often take improper measures. All the melons that can sit are left, and the excess female flowers are not removed.
2. Harvesting is not timely. Due to the instability of the price of guarana, sometimes in order to wait for high prices, the melons that have already grown up are left on the melon quails, causing "falling lice" and excessive consumption of nutrients in the plants.
3. Improper fertilization. Many vegetable farmers fertilize the phenomenon of “multiple, chaotic, and miscellaneousâ€. In particular, excessive use of compound fertilizers results in excessively high concentration of soil solution, resulting in damage to the roots and reduced absorption capacity, which affects the normal growth of the plants.
4. Overdosing. The short interval between application and concentration exceeds the standard, and it is easy to form phytotoxicity, resulting in shrinkage of plant leaves and decreased photosynthesis.
5. Improper watering. Watering does not pay attention to weather conditions, such as encountering even cloudy days after watering, easily causing roots of cucumber roots, so that the growth of roots is inhibited, causing an impact on the growth of the above ground.
Second, cucumber "stop" preventive measures
1. Strengthen plant adjustments. When cucumbers fall, they cannot fall too low once, and the plants are maintained at a height of about 1.5 meters, ensuring that there are more than 15 functional leaves on the plants. For more plants sitting melon, to be properly melon, invisible melon stay, otherwise it is easy to cause the middle and late "rest." The yellow leaves at the bottom should be removed in time to reduce nutrient consumption.
2. Strengthen light management even in cloudy days. Even after the sunny days can not suddenly suddenly uncover the grasshopper, should explode flower buds, so as not to cause flash seedlings.
3. Pay attention to fertilizer management. Watering in low-temperature and low-light weather cannot be too diligent and flood irrigation is not possible. Also note that after the watering, wait until the temperature in the shed increases to 30°C to release the air, and the air outlet should be small to large. Do not overdo it at one time to avoid flashing. Fertilizers are flushed with water, and fertilizers containing humic acid or amino acids that are easily absorbed by cucumbers should be applied. The amount of one-time use should not be excessive.
4. Strengthen disease prevention and control. Cucumbers in greenhouses are susceptible to downy mildew, brown spot disease, gray mold, and bacterial keratoderma. For these diseases, we must adhere to the idea of ​​“prevention as the mainstay and comprehensive prevention and control†to ensure that there are no susceptible plants in the shed. When using drugs, the concentration should be strictly controlled. Do not mix three or five kinds of pesticides to reduce the occurrence of phytotoxicity.
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