Detailed Explanation of Key Technical Points for Early Spring Management of Garlic

Spring field management of garlic mainly refers to the management from after the spring temperature rises until the harvest period. This period is exactly when the garlic bulb expands, and it is also a period when diseases and pests occur frequently. Therefore, doing a good job of management during this period is of great significance for a bumper harvest of garlic.

1. Fertilizer and water management: The application of fertilizer should grasp the principle of supplementing vigorous growth and promoting weak growth. At the same time, irrigate well with the "two waters," namely the green-returning water and the bulb-expanding water. Generally, after garlic returns to green, plots with vigorous growth should be given little or no fertilizer; for plots with yellowing seedlings and weak growth, combined with watering, in early March apply 10-15 kg of urea or 15-20 kg of high-efficiency compound fertilizer per mu. In early to mid-April, combined with watering, apply 20-25 kg of urea or high-efficiency compound fertilizer per mu.

2. Pest and disease control: The main pests and diseases include root maggots, Phytophthora blight, gray mold, and garlic virus disease.

(1) Root maggots. From late March to early April, use high-efficiency, low-residue pesticides, such as phoxim, 100-150 mL per mu, diluted with 40-50 kg of water, and spray during the peak egg period, or apply a 1000-1500 times dilution as a root drench.

(2) Phytophthora blight. Spray with a 500 times dilution of 58% metalaxyl-mancozeb wettable powder, once every 7 days.

(3) Gray mold. Spray with a 1500 times dilution of 50% procymidone wettable powder, once every 7 days.

(4) Viral disease. In the early stage of onset, spray with a 400 times dilution of 5% Jun Du Qing for control, and pay attention to controlling aphids.