Recently, when interviewed by reporters in the mouth of towns in Qingzhou City, the reporter discovered that the current phenomenon of yellow leaves is very serious and many vegetable farmers are puzzled. At present, the ginger soon enters a small cultivation period, and the ginger block also begins to grow and grow, while the large turmeric leaf will affect the accumulation of nutrients. Therefore, current ginger farmers should pay attention to protect the ginger leaves and prevent yellowing of the leaves. The reporter suggested that the following points should be focused on:
First of all, remove the film in time to prevent the physiological yellowing caused by high temperatures. At present, the outside temperature is relatively high. Although the ginger planted in the small sheds adopts the practice of perforating and ventilating, but without removing the membrane, the temperature inside the shed is very high, and the high ground temperature affects the expansion of the ginger block. Affect the roots of the lower bar and absorption, resulting in yellow leaves, therefore, remind Jiangnong should promptly withdraw the film, but the withdrawal should be carried out in the cloudy afternoon, to avoid infection due to severe environmental changes and diseases.
Second, after the withdrawal of the film, early prevention of bacterial disease occurs. After removing the film, ginger grows in the open air and is greatly affected by the weather. After entering July, there is more rainwater. Under the condition of high humidity, ginger is very susceptible to bacterial diseases, causing yellowing of the leaves. . Therefore, we must prevent it early. For uncoated plots, use s-Murollin to increase the disease resistance of the plant before removing the membrane. Also pay attention to the administration of streptomycin and 800 times the amount of mesotonin or 1000 times of quinolinone, Prevent ginger bacterial diseases.
In addition, care should be taken to prevent large yellow turmeric leaves caused by leaf blight. In the hot and rainy season in summer, or when the dew is heavy in the hot season, the disease is serious. Therefore, to do a good job of cooling, in the case of a large temperature difference after the rainy days, there is more condensation at night, and timely spraying. 10% difenoconazole 1500 times, 50% carbendazim 400 times can be used to control.
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