Garlic diseases are more common and generally do not cause dead trees. Garlic sclerotia and white rot are the main diseases that cause garlic to die. The former is an intermittent hazard and the latter occurs year-round. Vegetable farmers should do preventive work.
Garlic Sclerotinia damage pseudo-stem, yellow-brown rotting, lodging, or slow growth of aboveground plants, plants withered early. Garlic white rot firstly developed from the outer leaf tip, resulting in yellowish-brown longitudinal stripe, slow growth and yellowing of the plant, development of the pseudostem afterwards, and soft rot when the humidity was high.
Prevention and control measures: First, it is necessary to rot. The pathogens of diseases such as white rot and sclerotinia are all overwintering and overwhelming in the soil with the remnants of diseased plants. The diseased plant residues should be completely cleaned up, and at the same time, three years or more of rotation should be used for rotation. The second is seed processing. Use 50% thiophanate-methyl wettable powder, 50% carbendazim wettable powder or 70% mancozeb 0.51 kg water 57.5 kg, evenly spray on garlic seeds, then air dry sowing, get good control effect. The third is soil treatment. Use 50% carbendazim WP 23 kg or 70% thiophanate-methyl 1.52 kg per acre, mix 60 kg of fine soil, spread the surface evenly before sowing, or concentrate the spraying at the sclerotial disease disease center. Fourth, agricultural control. It is strictly forbidden to pour water into the river, drain the water in time after the rain, and combine the field management to remove the diseased plant debris and bring it out of the field. In combination with pouring water, 510 kilograms of urea per acre can also be sprayed with potassium dihydrogen phosphate solution to increase disease resistance. Use plant ash or gypsum powder on the base of garlic stems to reduce the chance of pathogen invasion. Fifth, chemical control. In the early stage of leaf disease spraying, 72% of agricultural streptomycin soluble powder 4000 times or 77% can kill 500-800 times of wettable micro-particles, sprayed once every 7 days, 23 times depending on the condition.
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