Management techniques of garlic in spring

Before and after the Waking of Insects, with the rise of temperature, Cangshan garlic entered the green growth; before and after the Spring Equinox, reached the rotten mother period (also known as the withdrawal period). Due to the influence of continuous low temperature and drought weather in last winter and this spring, the growth of garlic is affected, the seedling condition is poor, and there are more weak seedling garlic fields, so the management must be strengthened.

First, the management of the rejuvenation period. Before and after turning green, plant growth regulators or amino acid foliar fertilizer can be sprayed to enhance stress resistance and prevent the damage of late spring cold to garlic. After the Spring Equinox, garlic is in the rotten mother stage, and garlic maggots are easy to occur in this period, so pay attention to spraying to control seed flies.

Second, the management of garlic bolting during the growing period. From late March to early April, onion flies and seed flies were sprayed twice every 7-10 days. Garlic leaf blight and Botrytis cinerea were controlled from late April, spraying once every 10 days and 2-3 times before bolting. Plastic film garlic should be after Qingming Festival, after the temperature is stable, remove plastic film and weeds, apply 20 kg diammonium or potash fertilizer per mu, spray high efficiency foliar fertilizer, and then irrigate once. Pay attention to stop watering one week before bolting in order to facilitate bolting.

Third, the management of garlic expansion period. After bolting, watering once (10-15 kg high potassium fertilizer can be flushed with water), 12 times according to the weather before harvest, keep the ground moist, meet the water needs of garlic in the later stage, and spray once disease prevention medicine. at the same time, foliar fertilizer was sprayed to consolidate the effect of preventing and controlling garlic diseases and ensure a good harvest of garlic.

IV. Pest control

The pests of garlic are mainly garlic maggots, and the diseases are leaf blight, purple spot, virus and so on.

Insect pests: garlic maggots. 2% avermectin 1000-fold solution can be sprayed every 5-7 days for 2-3 times, or phoxim or 50% dichlorvos mixed 800-1000 solution can be used to kill maggots.

Diseases: 1. Leaf blight. Carbendazim gel suspension 0.15kg plus potassium dihydrogen phosphate 0.15kg per mu, or 1500 times solution of 50% prohydantoin wettable powder or 50% copper succinate (DT) wettable powder, sprayed once every 7 days for 3-4 times in a row.

2. Purple spot. At the initial stage of the disease, spraying 75% chlorothalonil wettable powder 500,600 times liquid, or 64% Chlorothalonil wettable powder 500x liquid, 58% Metalaxyl Manganese Zinc wettable powder 500x liquid, 50% Prohydantoin wettable powder 1500 times liquid, taking medicine in turn every 7 to 10 days, continuous prevention and treatment for 3 times, all have good results.

3. Virus. Use 1.5% Zhixianling 2 emulsion 1500 times, 20% virus A wettable powder 500x, 0.5% antivirus 1 300x, JK 200,250x, 5% Shiduqing 1500 times, once every 10 days, 2-3 times in a row.