How to prevent sunflower wilt?

How to prevent and cure Verticillium wilt by planting sunflowers? Please introduce the harm of Verticillium wilt to sunflower: the disease starts from the lower leaves of the plant. In the early stage, the swelling and pressure disorder of the local tissue of the leaf tip or leaf edge, green wilt, also occurred on the tissue in the middle of the leaf, the shape was irregular, but the edge was infiltrating, yellowing, and the chlorotic leaf tissue expanded rapidly. when it develops to the intervein tissue within the leaf, the diseased tissue is necrotic, brown and dry, and develops into the leaf one by one. Finally, except the main vein and the leaves on both sides of the leaf, the rest of the tissue turns brown and scorched and necrotic. It is easy to break and the diseased leaves are wrinkled and deformed. In the later stage, all the leaves of the diseased plants were significantly diseased, parched and scorched, and slightly dwarfed. The vascular bundles turned brown after dissection of the stem. White mildew can appear on both sides of the leaf or stem when the humidity is high. The pathogen overwinters in soil, remains and seeds. Seed pericarp carries bacteria, embryo and endosperm do not carry bacteria. Germs can survive for a long time in the soil. Prevention and control methods of sunflower Verticillium wilt: 1. Foliar spray: at the initial stage of the disease, choose 65% Dysen zinc wettable powder 500 times liquid, or 50% carbendazim wettable powder 500x solution, or 50% carbendazim wettable powder 500x solution, or 70% methyl thiophanate wettable powder 800ml 1000 times liquid, or 64% poison alum dull wettable powder 1000 times liquid, or 77% can kill 101101x wettable powder liquid. 20% Longke wettable powder 400 times liquid, or 14% ammonia copper wettable powder 250 times liquid, or 75% chlorothalonil wettable powder 800 times liquid and so on for foliar spray. 2. Root irrigation: the seriously affected fields were irrigated with 12.5% Zhiweiling EC 200x solution, and each diseased plant was irrigated with 100ml. Click to get more sunflower planting techniques click to get more food crop planting techniques