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How does okra leaf spot occur? What are the prevention and treatment techniques?

Okra leaf spot is a stem-spot fungus of the subphylum Hemimycota, known as okra stem-spot fungus. The fungus remains in the soil along the plant or diseased body during the winter in the mycelial and conidial stages. Endogenous conidia emerge from the holes where the pathogen is distributed, spread through rain splashing, and cause disease in leaf wounds or stomata. , causing leaf spot disease. Generally speaking, fields with poor soil, extensive management, insufficient fertilizer, and poor plant growth are prone to disease.

Improve the resistance of the plant itself and help reduce the disease. Film cultivation should be implemented where conditions permit. Reasonable pairing to improve inter-strain permeability. On dry days, the water supply is timely and sufficient. Apply sufficient basal fertilizer, and after timely planting, promote seedling fertilizer and flowering and fruiting fertilizer to coordinate plant vegetative growth and reproductive growth. According to the growth trend of plants, it is used to collect leaves, remove paddles, control vegetative growth, and improve inter-plant permeability. Top the fruits in time according to the needs of picking tender fruits or picking fruits. It is recommended to nourish feet or flesh. Double-soak the smart factor film before broadcasting, then dry it and mix it with most of the bibimbap to keep warm, moisturize and absorb swelling. Smart factor membrane bibimbap quickly puts on isolation clothes for seeds, providing the best environment for seed development, while isolating germs and other residues in the soil, improving the germination rate of Aberdeen.

In the early stage of the disease, double-spray the smart factor film to form a polymer protective film containing smart factors on the surface of the plant, which intelligently filters plant respiratory impurities, prevents pollution from bad air factors, and inhibits viral infection. In addition to referring to the anthrax prevention method for pathogenesis medication, you can also spray 800 times smart factor film and 1: 1: 160 Bordeaux mixture, once every 7-10 days, 2-3 times. Black spots on leaves are a common disease, usually occurring on rhizomes. There are water-stained spots on the diseased leaves. If the environmental humidity is relatively high, the spots may spread quickly. The cause of okra sickness is usually bacteria or fungi whose spores overwinter in the soil and are splashed onto the plants through irrigation, causing disease.

Okra infectious disease is a fungal disease caused by reverse fungi. After the plant becomes infected, the conidia produced by the diseased part re-infiltrate through the air or irrigation water. Antibacteria are mainly oospores, which spend the winter in the soil and can survive for a long time, usually 2 to 3 years in the soil. Generally warm and humid conditions, poor management, lack of foundation, weak growth conditions, especially conditions of watering before rain, and moisture retention in the warehouse are conducive to the occurrence and spread of the disease. After transplanting rice seedlings for agricultural prevention and control, it is necessary to clean the power supply and burn pathogens to reduce the source of bacteria. Farmers must be given adequate fertilizers, and fine materials must be added to the clayey soil to improve soil permeability. Pour water promptly and appropriately, and pour small amounts of water frequently to prevent flooding. Plant reasonably densely and cultivate to loosen the soil.