Garlic is a common vegetable in life. In the process of garlic growth, it will encounter many diseases of pests and diseases . Among them, white rot is a common disease in the process of garlic planting. This article will introduce the agent of garlic white rot in detail. Control method.
Garlic white rot is the most prone disease during garlic growth. Its pathogens are low temperature and high humidity, the temperature is below 20 °C, and the humidity is more than 90%. Therefore, the rapid onset of the rainy season, especially the growth of thin and continuous cropping can lead to increased disease. High temperature and low humidity are not good for the disease. At the beginning of the disease, the tip of the outer leaf is strip-like or the tip of the leaf turns yellow, and then spreads to the leaf sheath or the inner leaf. The plant grows thin and the whole plant turns yellow and dwarfs or die. When the diseased plant is pulled out, the bulb becomes black and rot. When the disease is serious, the garlic can be killed.
Garlic white rot mainly affects leaves, leaf sheaths or bulbs, which has a great influence on yield and quality, and should be paid attention to in production. Comprehensive prevention methods include: garlic treatment. Do a good job of garlic treatment before sowing, which can effectively cut off the initial infection and prevent disease. Garlic should be treated with 50% carbendazim WP or 50% thiophanate-methyl WP before sowing. The specific method is to sterilize 50 kg of garlic, 500 g of water, and 3-5 kg ​​of water (evenly sprinkle on garlic), and dry it for sowing.
Forbidden continuous work. Garlic white rot is a soil-borne disease, and continuous cropping is an important way of disease. Therefore, garlic should be strictly carried out with non-garlic crops for more than 3-4 years.
Strengthen the training. The main field measures to prevent garlic white rot are: early spring to carry out topdressing and raising seedlings, loose soil, sputum and sputum drop, promote garlic growth, improve disease resistance; find that diseased plants are excavated in time, bring out the field to dry and burn out; Spread and manure on the spot to prevent the bacteria from being brought into the field.
Chemical control. In the initial stage of the disease, use 50% carbendazim WP 500 times solution per acre, or 50% thiophanate-methyl WP 600 times solution, or 20% methyl chloro-phosphorus emulsifiable oil 1000 times solution, or 75% Garlic leaf green wettable powder 1500 times liquid 50-60 kg spray control, once every 7-10 days, continuous medication 2 times. The rhizome can also be irrigated with 75% garlic leaf green wettable powder 1000-1500 times liquid or 50% chlorhexidine wettable powder 1000-1500 times liquid, once every 7-10 days, and continuously administered twice. The rooting method is better than the spray control method.
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