How do root maggots eat garlic bulbs in autumn to prevent and cure garlic calcaneal disease

Root maggots are also called ground maggots and garlic maggots. Autumn is the peak time of harm. Therefore, in autumn, we should beware of garlic maggot larvae eating garlic bulbs, causing bulb rot, aboveground garlic leaves withered, wilting, and even death.

Garlic root maggot

Prevention and control measures:

Agricultural prevention and control. Fresh garlic of uniform size, disease-free and injury-free was used for rotation with non-onion garlic for 3-4 years. Organic fertilizer must be fully ripened and applied. When used as base fertilizer, it was deeply buried in the soil and isolated from the species of garlic. Garlic maggots like to be wet and afraid of dry. 150 kilograms of plant ash is spread around the roots of garlic per mu, and the control effect is better. Garlic maggots occur in the plot, if necessary, flood irrigation once, can reduce the occurrence.

Physical control. In the adult stage of root maggots, brown sugar water, vinegar and water can be mixed with brown sugar water, vinegar and water according to the ratio of 1 to 2.5, mixed with sawdust and trichlorfon, and put into the trap basin, which can kill adults before spawning, and the effect can be doubled with half the effort. Combined with watering, nitrogen and sulfur fertilizer with killing effect on garlic maggots was applied to reduce the damage degree. Ammonia water was applied twice before the rotten mother stage of garlic to ward off adults. Irrigate less water during the rotten maternal period to reduce the number of eggs.

Chemical control. Combined with sowing, mix 50 kg cake fertilizer or fine soil with 3-4 kg 5% phoxim granules per mu and spread them in the sowing ditch. Seed dressing with healthy and disease-free garlic seeds, that is, every 50 kg garlic seeds are mixed with 5 kg 80% trichlorfon 20 times liquid, or with 100 kg 150 ml 50% phoxim EC plus 25 kg 30 kg water, mixed with 200 kg 250 kg garlic. At the initial stage of larval occurrence, 2.5% trichlorfon powder was sprinkled in the base of garlic and the surrounding soil. It can also be irrigated with 2000 times of 80% trichlorfon, 50% phoxim EC, 1000 times of dimethoate, 400 times of pyrethroid, 300 times of ferrous sulfate and 1000 times of 48% Lesben EC. Take out the water spinner on the sprayer head and inject the liquid into the root soil once every 10 days for 2 or 3 times depending on the insect situation.

In the peak period of adults, timely spraying and control. Each mu of garlic was irrigated with 2.5% trichlorfon powder 1.5kg, or with 1000 times of 40% dimethoate EC, 2000 times of 2.5% deltamethrin EC, 2000 times of 2500 times of cinnopyrum EC, once every 7 days, 2 times in a row, and the effect was the best at 9: 11 am. You can also sprinkle an appropriate amount of wheat bran evenly with 80% dichlorvos 600 × 800 times, fumigate and kill adults, and sprinkle again after 7 days and 8 days.