The land selection should be based on plots of no onions and garlic vegetables within three years. The soil should be soil with water and fertilizer. In addition, the terrain should be high and the drainage should be good to prevent rain. From the arrangement of the sputum, the scallions of the spring-baked ground vegetables such as the early-maturing cucumbers and tomatoes can be sown.
Soil preparation and fertilization After the first crops are pulled, the soil is rectified in time to remove the residue in the field and the flat is 1.5 meters. Because the shallots are densely planted and have a long growing period, the base fertilizer should be applied. 3,000-4,000 kilograms of decomposed manure should be applied per acre, or other fertilizers with longer fertilizer efficiency should be used as the base fertilizer and the manure soil should be fully mixed and leveled.
Granulation sowing must use the new material harvested in the same year to ensure the emergence rate. The amount of seed per acre can generally be controlled at 4 to 5 kilograms. When the temperature is not suitable, the amount used is larger. When planting, first use the pair of teeth on the flattened surface to ditch, the groove distance is 8 to 10 cm, and the groove depth is 1.5 to 2 cm. After opening the ditch, sprinkle the seeds, then sweep the kneading surface, and then use your foot to make the seeds fully in contact with the soil.
After sowing, the water is managed immediately after sowing. Seedlings must always keep the soil moist before emergence to facilitate emergence. Watering should be done in time when the surface is dry; pay attention to drainage and flood prevention during heavy rain. After the seedlings are unearthed, if the atmosphere is dry, it is necessary to pour small water to reduce the soil moisture. Pest control Because the scallions are in the hot and rainy season, and the planting density is large, the prevention and control of pests and diseases is an indispensable link.
The disease can be sprayed with 64% anti-virus WP WP 500 times, 72.2% Plex water 800 times solution, spray once every 7 to 10 days, and even spray 2 to 3 times. Purple spot disease can be sprayed with 64% anti-virus WP 1500 times solution, 40% Dafu Dan WP 1500 times solution, 50% Pu Hai WP 1500 times solution. The larvae of Liriomyza sativae can be controlled with 25% thiophosphorus emulsifiable concentrate 1000 times, but should be stopped half a month before harvest. The onion thrips can be sprayed with 50% malathion or 50% dimethoate 500 times.
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