Recently, the reporter found in the interviews of Qufu Town, Qingzhou City, Shandong Province, that the current phenomenon of large turmeric leaves is very serious, and many vegetable farmers are puzzled. At present, the big ginger quickly enters the small cultivation period, the ginger block also begins to expand and grow, and the large turmeric leaves will affect the accumulation of nutrients. Therefore, the current ginger farmers should pay attention to protect the leaves of the ginger, to prevent yellowing of the leaves. The reporter suggested that the following points should be focused on:
First, remove the membrane in time to prevent high temperature from causing physiological yellow leaves. At present, the outside temperature is relatively high. Although the ginger grown in the small arch shed has adopted the practice of perforating and cooling, the temperature in the arch shed is very high without the withdrawal of the membrane. The high ground temperature affects the expansion of the ginger. Affecting the lowering and absorption of the root system, causing the leaves to yellow, therefore, remind the ginger farmers to withdraw the membrane in time, but the withdrawal of the membrane should be carried out in the cloudy afternoon, to avoid the infection due to severe changes in environmental conditions.
Secondly, it is necessary to prevent bacterial diseases from occurring early after the film is removed. After the film was removed, the ginger grew in the open field and was greatly affected by the weather. After entering July, there was more rain. In the case of high humidity, the ginger was easily infected with bacterial diseases, causing yellowing of the leaves. . Therefore, it is necessary to prevent it early. For unextracted plots, s-excitation can be used to increase the disease resistance of the plants before the membrane is removed. At the same time, attention should be paid to the administration of streptomycin and 800 times of neutrophin or 1000 times of quinolinone. Prevention of bacterial diseases of ginger.
In addition, care should be taken to prevent the large turmeric leaves caused by leaf blight. The disease occurs severely during the hot and rainy seasons in summer or when the dew is heavy in the hot season. Therefore, it is necessary to do a good job of cooling down. In the case of a large temperature difference after a rainy day, there is more condensation at night, and it is necessary to spray the medicine in time. It can be controlled by 10% difenoconazole 1500 times solution and 50% carbendazim 400 times solution.
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