The common root pests of garlic include flies, root lice, stem nematodes, and feces mosquitoes. Now we describe their harm symptoms and prevention methods as follows:
Species fly. The species fly, also known as earthworms, garlic sprouts, and green onions, endangers the garlic with flies and onion flies. The two species of fly were similar in morphology. The larvae were milky yellow dragonflies with a body length of 0.7-0.9 cm and 7 pairs of fleshy protuberances on the tail. The larvae harm the garlic bulbs in the ground, causing the garlic tissues to ulcerate gradually. The heart leaves yellow due to the loss of nutrient supply, and the serious whole plant dies. Prevention methods: First, a small amount of crops have been damaged by the crop, harm all kinds of manure for the application of refined organic compound fertilizers, such as bio-organic complex fertilizer, etc., or application of multiple compound fertilizer; Second, 667 square meters ( 1 mu) of terrinol granules 800 to 1000 grams, mixed with fine soil mixed with poisonous soil, spread or ditch applied in the rhizosphere; the third is to use 40% Kabansi EC 200 ~ 250 g watered 200 kg IRRIGATING, The effective period is 2 to 3 months. Fourth, the place where the water source is sufficient can be continuously irrigated for 2 to 3 times. Each time the water is immersed for 24 hours, the species can suffocate and then they should be drained as soon as possible.
Roots. Rootworms are both field pests and pests during storage. The pupa is ovoid and white, and is usually spawned at the gaps in the base of garlic. The most suitable temperature for developmental hazards is 15 to 20°C. They feed on bulbs to rot and stink, causing the leaves on the ground to wither and die severely. The bulbs were damaged during storage and the garlic dried up into empty shells. Control methods: First, use 40% of the quick-acting sulfur-phosphorous emulsion 1000 times liquid spray, the second is 667 square meters with quick-acting sulfur phosphorus 70 ml and fine soil mix into poisonous soil.
Stem nematode. There are many kinds of stem nematodes, but it is more harmful to the onion nematodes. Its body resembles locusts, and its ends are more pointed, crawling by creeping. Adults or larvae invade spawns from the stomata of garlic stems, bulbs or leaves, and larvae feed the stems and leaves, causing the bulbs to turn brown and rot, and the leaves become chlorotic. Control methods: First, use 40% of rapid-acting flow of phosphorus emulsifier 1000 times liquid spray, and the second is 667 square meters of Tering granules 800 to 1000 grams of soil mixed with fine soil spread.
Feces mosquitoes. Adults of adult mosquitoes like to be active in wet, low light, and decomposing environment and lay eggs on the surface of soil. The larvae are tan and brown, and they invade the bases and bulbs of pseudostems by creeping, causing the garlic plants to wither and the bulbs to become soft, brown, and rot. The petal is bare or even rot. Control methods: First, fine intertillage and weeding to create a net environment of pine grass, inhibit egg hatching and larval activity; Second, use 50% phoxim EC 800 times liquid to kill larvae, or 667 square meters with 40% Kabensi EC 200 ~ 250 g watered 200 kg Irrigation.
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