Pesticide control method of garlic root

Due to the changes in the weight and cultivation of ecological environment, garlic root pods commonly occur in garlic growing areas. The main damages of garlic are the onion land fly, pea phytophthora and leeks, and the late flies and leeks are Take larvae on the surface of the upper layer of 1-4 cm to feed on the young garlic bulb sap, or larvae into the clove to suck food damage, the formation of yellow-brown holes, further causing garlic rot, garlic, smaller, garlic cracking and economic losses. The larvae were infested from late April to early June. The damage of garlic root pods to garlic is generally 10% to 30%, or even higher. The prevention and control techniques of the roots are:

I. Agricultural control

1, improve the quality of soil preparation. Before field preparation, clean up the fields, land, roadside garlic, onions, and squatting residues, and pour enough water into the bottom. Combine applying base fertilizer, deepen the soil 30-40 centimeters, and plough the soil, lay the seedlings and level them.

2, selected garlic, improve the quality of sowing. As far as possible, use different species of garlic and virus-free garlic varieties; choose bulk garlic, remove moldy, rotten garlic and garlic, and remove the garlic garlic; seeding depth of about 4 cm is appropriate, and cover the loose soil.

3, using plastic film cover. The cover film should be careful to prevent the film from cracking to form holes; the seedling holes should be small, and the loose seedling holes at the base of garlic sprouts should be covered with loose soil.

4, scientific fertilization, strengthen fertilizer and water management. Mushi is fully decomposed organic fertilizer 3-4 square base fertilizer; organic fertilizer 10-15 days before delivery to Daejeon, with 50% dichlorvos EC 800 times liquid spray, mix and dip with smash, and use the soil seal severely killing 7 days. Mu Shi cooked cake fat 20 kg, 30 kg of DAP, 10 kg of urea as the base fertilizer. In the later stage of growth, urea can be topdressed 1-2 times with irrigation, about 8 kg each time. Overwintering should be overwhelmed with wintering water to kill overwintered larvae and earthworms. In the first half of April, the first and second generation larvae were smoldered in combination with field irrigation, and the need for water from garlic was met to promote the robust growth of the plants.

5, garlic fields should be as far away from onions, depression, as far as possible when the garlic harvest completely remove the debris, reduce the amount of field debris.

Second, chemical prevention

1. Before the planting, use 50% phoxim 1.5-2 kg to add 6-7 kg of water, and then mix 50 kg of fine soil and combine the seeds for spreading in the sowing ditch.

2. Control during the growing season: According to a field survey in the middle and early April, a thin layer of dry turfgrass was applied to the base of garlic to reduce spawning during the initial period of adult emergence.

3. When the larvae are found to be harmed, 48% of Le Siben EC can be used 1000 times, or 50% phoxim EC 800 times, or 90% trichlorfon crystal 1000 times to irrigate the roots, once every 10 days. Insects were even irrigated 2-3 times. Or per acre diluted with 350-500 ml of 48% Locust EC diluted with water into the garlic field. The use of highly toxic highly toxic pesticides such as 3911, 1605 is prohibited.

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