Pest control techniques of onion, garlic and leek vegetables

The common pests of onion, garlic and leek vegetables are mainly seed fly, onion thrips, onion leaf miner, leek leapfrog bug, leek root maggot and so on.

Green onion field fly

Onion field flies mainly damage garlic, onions and onions, and sometimes leeks. The larvae are harmful to the sown seeds and young stems and roots, so that the seeds can not germinate and the seedlings die. The green onion field flies eat the underground garlic cloves, which will cause the garlic cloves to crack, the aboveground parts to turn yellow, and the heavy ones to kill the whole plant.

Control methods of sowing flies in onion field

1. Agricultural control: the application of organic fertilizer should be fully mature, apply evenly, deeply and isolated from the seeds, and cover the soil immediately after application. Select seedlings and sow soil at the right time. Moderate moisture, maggot damage can be flooded with flood irrigation, once every other day, twice in a row.

2. Chemical control: when sowing, poisonous soil (25 grams per mu of trichlorfon and 15 kilograms of fine soil) is applied to kill larvae. 1000 times of trichlorfon or 50% dichlorvos EC or 1000 times of phoxim EC can be sprayed with 1000 times of trichlorfon or 50% dichlorvos EC during the peak period of adults. Spray again every 6-8 days.

Onion thrips

Onion thrips mainly damage green onions, garlic, onions, leeks, melons and eggplant vegetables, sucking up the epidermis of host leaves, tender stems, buds and other tissues with adults and nymphs. There are long strips of white spots in the affected parts. In severe cases, the onion leaves are twisted and withered, atrophied and sagging, and spread a variety of crop virus diseases. It occurs seriously in a dry, rainless and warm environment.

Control methods of onion thrips:

1. Agricultural control: remove the fallen leaves of the residual plants and burn them outside the field, turn the land deeply in time, and reduce the source of insects. Small water is watered frequently to prevent drought and increase the application of phosphorus and potassium fertilizer.

2. Physical control: make use of the blue habit of thrips, set up blue plates coated with engine oil to trap and kill them in the field. 3, chemical control: alternately spray 20% good winter EC 2000-2500 times, or 2.5% enemy kill EC, or 20% chrysanthemum horse EC 1000-1500 times, or 2.5% kungfu EC 3000-5000 times, or Aktai 1000-15000 times. Spray again every 6-8 days.

Spring onion leaf moth

The larvae of onion leafminer latent feed on the mesophyll in the leaf tissue, forming tortuous insect pathways, which only leave the upper and lower epidermis, which can wither the whole leaf and decrease the yield.

Control methods of Spodoptera litura

1. Agricultural control: timely removal of weeds inside and outside the field in early spring, treatment of residual plants and reduction of insect sources. Carry out formula fertilization and do a good job in fertilizer and water management.

2. Trapping and killing adults: trapping and killing adults with sugar and vinegar solution.

3, chemical control: 98% Batan soluble powder 2000 times liquid, or 20% imidacloprid solvent 2000 times liquid, or 20% good year winter EC 1000 times, or 10% bromo horse EC, chrysanthemum horse EC 1500-2000 times, or 40% Qixingbao EC 600800 times, pay attention to the navel and spray alternately in time.

Leaping bug bug

Leek leapfrog bugs suck leek with adults and nymphs to produce white to light brown spots, and when serious, the leaves of the whole plant turn yellow and wilt.

Control methods of leaping bug in Chinese chive

1. Agricultural control: winter ploughing and cleaning the countryside to remove fallen leaves and dead grass on the edge of the field; timely watering can kill some adults and the first generation eggs.

2. Chemical control: mainly adults, nymphs should be controlled before dispersing. 1500-2000 times of dichlorvos EC, 3000 times of 2.5% deltamethrin, or 3000-4000 times of 50% cyanohydrin EC can be sprayed once every 6-8 days for 2-3 times.

Leek root maggot

Leek late eye Qin mosquito alias leek maggot, mainly to harm leek, green onions and garlic. Leek suffers the most. The larvae gather leek underground bulbs and tender stems to eat, causing the bulbs to rot and the leek leaves to wither and die. If it is light, it will cause lack of plants and broken ridges, and if it is heavy, it will destroy the seeds. Larvae like to be wet and afraid of dry, wet soil, succulent tender stems and bulbs suffer seriously.

Control methods of leek root maggot

1. Agricultural control: irrigation of vegetable fields in winter or spring can destroy some larvae, such as liquid ammonia (8-10 kg / mu). Dry the soil and roots for 5-6 days, sprinkle 50% malathion powder or 1.5% dimethoate powder (2 kg / mu) or spray fine soil with emulsion to make poisonous soil.

2. Chemical control: in the peak period of adult Eclosion, 3000 times of 10% chrysanthemum and horse EC was used. Or 2.5% deltamethrin 3000 times, or 20% fenvalerate 3000 times, or 50% phoxim EC 1000 times spray, preferably from 9 am to 10:00 When it was found in the field that the leaf tip turned yellow and softened and gradually lodged to the ground, root irrigation was carried out with 2000 times of 20% chloroma EC, or 5000 times of 2.5% phoxim EC, or 2000-3000 times of phoxim EC.