Control measures for cotton red leaf disease
In recent years, cotton leaf scurfosis has occurred in some cotton-producing areas, especially in some years, the incidence is fast, the area is large, and cotton production losses are heavy. The prevention methods are as follows:
Improve the environment and promote root hair. First, deep cultivating, high cultivating, loosening the soil layer, promoting cotton roots and rooting down; second, we must often bury the ditch, so that large water can be discharged, small water can be irrigated, rain stops, and cotton is strengthened. Resilience.
Pu Shi topdressing, re-application of potassium fertilizer. In the input structure of fertilizer, potassium deficiency is the dominant factor in inducing stem blight of red leaves. For this reason, in the process of applying the flower and bell fertilizer, for the cotton field with serious potassium deficiency, it is necessary to pay attention to the application of potassium fertilizer, and about 15 kg of potassium fertilizer should be applied per mu, one can meet the needs of cotton for potassium fertilizer in time, and the other can increase nitrogen and phosphate fertilizer. Utilization rate.
Top dressing and strengthening nutrition. For cotton fields where disease has occurred, as long as the growth point of the cotton plant remains fresh, the cotton plant should be topdressed in time. Spray 1-2% potassium dihydrogen phosphate solution or mix with 1% urea solution. Spraying, 50 kg per mu; can also be sprayed with 1:5O0 times of Huimanfeng active liquid fertilizer, which can effectively restore the growth function of cotton, but also pay attention to the prevention and control of pests and diseases in the middle and late stages.
Improve the environment and promote root hair. First, deep cultivating, high cultivating, loosening the soil layer, promoting cotton roots and rooting down; second, we must often bury the ditch, so that large water can be discharged, small water can be irrigated, rain stops, and cotton is strengthened. Resilience.
Pu Shi topdressing, re-application of potassium fertilizer. In the input structure of fertilizer, potassium deficiency is the dominant factor in inducing stem blight of red leaves. For this reason, in the process of applying the flower and bell fertilizer, for the cotton field with serious potassium deficiency, it is necessary to pay attention to the application of potassium fertilizer, and about 15 kg of potassium fertilizer should be applied per mu, one can meet the needs of cotton for potassium fertilizer in time, and the other can increase nitrogen and phosphate fertilizer. Utilization rate.
Top dressing and strengthening nutrition. For cotton fields where disease has occurred, as long as the growth point of the cotton plant remains fresh, the cotton plant should be topdressed in time. Spray 1-2% potassium dihydrogen phosphate solution or mix with 1% urea solution. Spraying, 50 kg per mu; can also be sprayed with 1:5O0 times of Huimanfeng active liquid fertilizer, which can effectively restore the growth function of cotton, but also pay attention to the prevention and control of pests and diseases in the middle and late stages.
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