Garlic planting disease prevention

(1) Variety selection Planting local varieties can use individual plants to purify and rejuvenate year by year, and select disease-free fields and disease-free plants to plant garlic. This is also a way to select disease-free high-quality garlic varieties. In addition, planting good local varieties after detoxification is a fundamental measure to prevent and control virus diseases.

(2) Agricultural control

1. Reasonable rotation of garlic leaf blight, purple spot, coal spot and other disease pathogens can survive winter or summer in the soil or diseased bodies, causing the number of pathogens to increase. Generally, garlic fields should be rotated with non-liliaceous crops for 3 to 5 years to reduce the pathogen base, ensure the supplement of certain nutrients in the soil, and reduce the occurrence of diseases.

2. Reasonable irrigation and drainage The garlic root system is neither drought-tolerant nor waterlogging-tolerant. The dry soil should be watered in time, and it is also beneficial to inhibit the occurrence of thrips. If the rainfall is too large, timely drainage, take this opportunity to spread ash, reduce field humidity, and increase Potassium fertilizer can also effectively suppress the harm of gray mold and root maggots, and achieve the purpose of increasing production and preventing diseases.

3. Timely cleaning of fields is particularly important in areas or fields prone to pests and diseases. Eliminating the diseased body, pulling out the central diseased plant in time, and taking it out of the garden for treatment is an important means to prevent the disease from spreading.

(3) Chemical control: When pests and diseases occur and spread in a large area, timely use of pesticides is required.

1. Disease control

Spray the medicine at the initial stage of the onset of viral diseases for about 7 to 10 days* for 2 to 3 times in a row. It can be used 1.5% Zhibingling emulsion 1000 times, 20% virus A wettable powder 500 times, 83 booster 100 times liquid, antitoxin No. 1 liquid liquid 250-300 times, etc.

Coal spot disease can be controlled with 65% Zinc WP 400-600 times solution or 1:1:100 Bordeaux mixture.

For leaf blight, you can choose to use 75% chlorothalonil wettable powder 600 times liquid, 50% protoxine wettable powder 1500 times liquid, 64% antitoxin alum wettable powder 500 times liquid, 60% succinate, ethyl phosphorous aluminum wettable powder 500 times solution, 1:1:100 Bordeaux solution control.

Purpura can choose to use 75% chlorothalonil wettable powder 500-600 times, 64% antiviral alum wettable powder 500 times liquid, 58% kasalaxyl manganese zinc wettable powder 500 times liquid, 50% protohycin WP 1500 times liquid control.

For gray mold and downy mildew, you can use 75% chlorothalonil wettable powder 600 times liquid, 50% frost copper wettable powder 800 to 1000 times liquid, 64% disinfectant alum wettable powder 500 times liquid, 72.2% Puli 800 times solution of grams of water, 500 times solution of 72% ethane manganese wettable powder.

Rust can be treated with 20% triadimefon EC 2000 times, 97% dirust sodium wettable powder 300 times, 25% Dili demulsified oil 3000 times.

2. Pest control

Scallion thrips can be used to kill sulphur 6000 times, 50% thiophene EC 1000 times, 50% dimethoate EC 1000 times, 10% chrysanthemum·horse EC 1500 times, 25% synergistic quinalphos EC 7000 times spray.

Both adults and larvae of root maggots should be controlled. Control adult insects by killing 6000 times solution and 2.5% deltamethrin 3000 times solution every 7 days*, and even prevent 2 to 3 times. To control larvae, root can be irrigated with 50% phoxim 800 times liquid, 90% crystal trichlorfon 1000 times liquid or 50% dimethoate 1000 times liquid.

In addition, if the occurrence of garlic is big, it can be controlled by spraying 2000-4000 times liquid of Mie Shao. During the storage period, 6g/m2 aluminum phosphide can be used to fumigate to prevent and treat coffee bean wee.

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