As the main economic crop, garlic is the main industry for farmers to increase production and increase income. Garlic with good quality is sold at home and abroad. However, it is prone to diseases such as garlic white rot, virus disease, and gray mold during the growth period, especially in the spring, the white rot of garlic is severe, the incidence rate of diseased plants is 10 to 20%, and the severe field is as high as 35%, directly affecting garlic. The high production and stable production have reduced the economic benefits and have seriously affected the garlic farmers' cultivation enthusiasm. The disease is caused by the infection of S. sclerotiorum, which is characterized by low temperature and high humidity, and it is slowly affected by high temperature and low humidity. Low temperature below 20 °C, humidity greater than 90% easily pop. In addition, the growth of thin garlic fields is prone to disease, and in case of rainy season, the rapid expansion, and continuous cropping is also easy to disease. In the early stage of disease, the tip of the outer leaf appears yellow or downward from the tip of the leaf, and then extends to the leaf sheath or inner leaf. The growth of the plant is thin, and the whole plant turns yellow and dwarf or withered. Pull out the diseased plants can be seen black decay bulbs, the field into pieces died, the formation of disease nest. The disease mainly damages leaves, leaf sheaths or bulbs. In order to effectively control this disease, a set of effective comprehensive prevention and control methods are summarized according to the production practice: 1. Seed treatment garlic seeds with 50% thiophanate-methyl WP or 50% carbendazim WP Treat after sowing. The specific method is to 0.5 kg of water to 3 to 5 kg, 50 kg of garlic and mix well, dry after sowing, can effectively cut off the initial infection. 2. Rotation of crop rotation Due to the incidence of continuous cropping plots, it is effective to prevent and treat the disease by effectively cropping continuous plots with non-garlic crops for 3 to 4 years. The effect of control is up to 90%. 3, field management in early spring to raise fertilizer to raise seedlings, soil loosening, row draining, promote garlic growth, improve disease resistance, and found that diseased plants in time excavated, brought out of the field drying out, non-fertilizer, to prevent the bacteria Bring it into the field. 4. In the early stage of the disease prevention and control, spraying 50% carbendazim WP 500 times or 50% thiophanate WP 600 times. Can also be used 50% acetaminophen wettable powder 1000 ~ 1500 times liquid irrigation rhizome, especially with 75% garlic leaf green WP 1000 ~ 1500 times liquid spray root, once every 10 days, once every 2 times More than 95% control effect, better control of the occurrence and spread of the disease. It can also be used 20% methyl-precipitated emulsifiable concentrate 1000 times or 75% lycopene powder 1500 times, every 10 days or so foliar spray twice, significant control effect.
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