There is also a disease called cotton leaf blight in cotton leaf stem blight. This disease crisis has a wide range and often occurs. So, how should cotton stem blight disease be controlled?
Cotton leaf stem blight symptoms identification
First, yellow leaves and red leaves appear, and the mesophyll tissue is chlorotic, but the veins remain green, and the leaf is thickened, shrunk, and brittle. The stem is sectioned, the transporting tissue is damaged, and the vascular bundle is not discolored, which can be distinguished from cotton verticillium wilt and blight.
Cotton leaf stem blight Occurrence
Soil: cropping, high salinity, poor soil
Fertilizers: potassium, lack of basic fertilizer, top dressing is not timely
Water: the water of oxygen, heavy rain or continuous rain after the drought
Cultivation: wheat cotton intercropping, the soil has not been ploughed for many years, the cultivation layer is shallow
Pest: Physalospora spot, brown patch of repeated infection control techniques
Improved soil: intensive cultivation, soil improvement, water and fertilizer to improve the retention capacity of the soil
Rational fertilization: heavy base fertilizer, skillfully fertilizer, prevent cotton pique late Tuofei
Reasonable adjustment: bud period → initial flower → full flower period → after topping, a small number of multiple
Reasonable row of tubes: the amount of irrigation in time of drought, flood water discharge speed of
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