How to effectively control leeks and maggots when planting leeks? Is there any good way to do this?

Leeks are a very common vegetable in daily life. In every rural household, they will choose to grow leeks at home, which is more convenient to eat. But residents often encounter problems with the phenomenon of leek maggots during leek cultivation.

How to have an effect** has become a headache for people. The following is a detailed introduction to how to avoid the harm of leek maggots, and readers can have an understanding in advance.

First of all, the appearance of leek maggots is related to the nutrient and water content in the soil, so it is difficult to remove leeks once they are found. Moreover, leeks are very fond of gnawing on the shoots of leeks, which leads to a decrease in the ability of leeks to absorb nutrients, causing leeks to wither and yellow, and even a large number of dry and dead. Therefore, residents can choose to use film covering for prevention.

After the leeks are ripe, one can choose to cover the soil where the leeks grow with a film on sunny days, and then set up insect nets. This can effectively resist the invasion of leek maggots. After the film is covered, it can effectively kill the eggs after strong sunlight, which is cost-effective and time-consuming.

After the leek maggot is killed by the sun, the film is uncovered again, and the temperature in the soil will drop rapidly, and people can ensure the normal growth of the leek by watering.

Another method is to pour hot water and sprinkle plant ash on top of the soil for control. One can cut off some of the leeks and then pour boiling water on the ground, so that the hot water can scald the leeks to death. Then cover the soil with plant ash.

Grass ash can play a role in sterilization, and can provide nutrients for the growth of leeks, be careful not to pour hot water on the roots of leeks when operating.

In addition, you can also choose to use drugs for control, and people can choose to use diluted pesticides to irrigate the roots of leeks. Choose a small amount of irrigation to eliminate most of the maggots. These are very practical prevention and control methods, I hope it will be helpful to all readers.

To prevent pests and diseases in advance, spray pesticides in advance, this time must be targeted, do not use pesticides indiscriminately, but also pay attention to the density of planting, to strengthen ventilation.

Insecticides can be used that correctly match the soil acidity and alkalinity, which will not kill leeks and can effectively control leek maggots; You can change a plot of land for leeks, sterilize, renovate, keep the soil moist, and then replant the leeks.

If you want to effectively prevent leeks and maggots, you must do a good job in field management; We must do a good job in the prevention and control of pests and diseases, adopt low-temperature drying methods, and properly spray some plant ash, and also do a good job in ventilation.

You can spray pesticides in advance, you can use sweet and sour water to trap insects, you can sprinkle some plant ash, you can change the stubble directly, and you must keep the spacing when planting.

1. Agricultural control methods: winter irrigation or spring irrigation can eliminate some larvae, and ammonia (8-10 kg mu) can be used. 2. Physical control methods for adult insects:

Make a solution of sugar, vinegar, wine, water, and trichlorfon in proportion, put it in a pot, and put 2-3 pots per mu. 3. Biological control method of leek maggot: apply leek maggot parasitic insect pathogenic nematode control.

First, the best way to control root maggots from leeks

1. Agricultural prevention and control methods.

1) You can use pesticides to irrigate vegetable fields in winter or spring, which can eliminate some larvae, and the pesticides can choose ammonia (8-10 kg mu).

2) You can dry the soil and dry the roots for 5-6 days, sprinkle 50% malathion powder or dimethoate powder (2 kg mu) or use emulsion to spray fine soil to make poisonous soil sprinkling.

2. Physical control methods for adult insects:

1) Sweet and sour can be used to attract adult worms.

2) How to use: Make a solution of sugar, vinegar, wine, water, and trichlorfon in proportion, put it in a pot, and put 2-3 pots per mu, so that it can trap and kill adults.

3. Biological control method of leek maggot: leek maggot parasitic insect pathogenic nematode can be used for control.

4. Chemical control.

1) In the peak period of adult emergence, you can use 10% chrysanthemum emulsifiable concentrate 3000 times, or deltamethrin 3000 times, or 20% fenvalerate 3000 times, or 50% phoxanthion emulsifiable concentrate 1000 times for spraying, spraying around 9-10 o'clock in the morning.

2) When the leaf tip is found to be yellowish and soft in the field and gradually lodging to the ground, it can be used to use 2000 times of 0% chlormona EC, or 5000 times of dichloride EC, or 2000-3000 times of 50% phoxanthion EC and other agents for root irrigation control.

2. Harmful symptoms of leek root maggots

1. Leek maggots are also called ground maggots and root maggots, and the maggots that harm leeks are mainly the larvae of the diptera late-eyed mushroom mosquito. Its larvae generally gather in the young shoots and bulbs in the underground part of the leek to eat, and in spring and autumn will eat the white stems in the soil, causing the rhizome to rot, and the leek leaves will begin to yellow and wilt and droop after being damaged until they are yellow and die. In summer, when the temperature is high, the larvae will move downward, mainly harming the bulbs, causing the entire bulb to rot, and in severe cases, large swaths of leeks will die.

2. Adult maggots are small flies with a body length of about millimeters and a gray to grayish-yellow body color. The larvae are maggot-shaped, milky white, the body length of the mature larvae is 9-10 mm, and the adult worms are small mosquitoes, about 3-5 mm long, and the body color is black-brown.

3. Adults prefer to be active in the damp and low-light environmental conditions, and their flight time is generally in the morning, afternoon and evening, and they mainly inhabit the soil crevices in the field. Adults have strong tropism to humus, yellow and sweet and sour taste, and females generally lay eggs in soil crevices, at the base of plants and in the crevices of leek leaf sheaths after mating.

Hello, leek maggot, also known as leek maggot, root maggot, generally refers to the leek late-eyed mushroom mosquito, sometimes including other mosquitoes and fly pests, is currently the most important in leek production, but also the most stubborn control object.

The hosts of leeks include leeks, green onions, garlic and other flowers and medicinal materials, and leeks are the most seriously affected and extensive. The hatchling larvae first feed on the upper end of the young stem at the base of the leek leaf sheath, and in spring and autumn, they mainly damage the young stem of the leek, so that the root rots, and the aboveground leaves wither yellow and die; In summer, when the temperature is high, it moves downward, borers eat into the bulbs, and in severe cases, the bulbs rot and the whole mound dies. Once the leeks are harmed by leek maggots, the leek seedlings wither and cannot germinate new sprouts, although some germinate new sprouts, but the growth is weak, and it takes 1 2 years of cultivation to return to normal growth.

Prevention and control methods. Choose resistant varieties. At present, there are no varieties that are completely immune to leek maggots, but some varieties have certain resistance to leek maggots, such as Yinchuan narrow-leaved leek, Guangzhou large-leaved leek, and Guangxi fine-leaved leek.

Generally speaking, non-dormant varieties have stronger resistance to leek maggots than dormant varieties, and varieties with strong growth strength have more obvious resistance to leek maggots.

Scientific fertilization. Apply fully decomposed organic fertilizer, and do not pour manure during the peak adult period. Fertilization should be done by ditching and deep covering soil. According to the experimental results of Shandong Agricultural University, if sheep manure is used as organic fertilizer in leek field, it has a good control effect on leek maggots.

Irrigation control. In early spring and autumn, especially when the autumn larvae occur, irrigate continuously for 3 days, once a day in the morning and once in the evening. It is advisable to flood the back of the ridge with irrigation, so that the leeks and maggots suffocate to death and reduce the damage.

Add an appropriate amount of pesticide for better results. After the leeks are harvested, stir well with 3% ammonia water, and irrigate the roots after 15 to 20 minutes, which can reduce the damage of leek maggots.

Summary. Hello, the reason for the occurrence of leek maggot is that this kind of insect likes the smell of leeks, green onions, garlic and other crops very much, and then the temperature and humidity of planting are also very like, maintenance is to eat the sprouts and young leaves of leeks, resulting in serious losses for farmers, the prevention and control methods are: farmers can apply thiamethoxam + cyantrantranidin 100-200 ml per mu with water.

Or 300 ml of 40% clothianidin, and 800 ml of 20% clothianidin. Generally, it can achieve more than 95% control effect.

What causes leek maggots? What are the hazards? How to prevent it?

Hello, I have seen your question, and I am sorting out the answer, please wait a while Hello, the reason for the occurrence of leek maggots is that this kind of insect likes the smell of leeks, green onions, garlic and other crops very much, and then the temperature and humidity of planting are also very like, and the maintenance is to eat the sprouts and young leaves of leeks, resulting in serious losses for farmers, and the prevention and control methods are: farmers can apply thiamethoxam + cyantraniliprole 100-200 ml per mu with water. Or 300 ml of 40% clothianidin, and 800 ml of 20% clothianidin.

Generally, it can achieve more than 95% control effect.

There are two main types of <> mole crickets: North China mole cricket and Oriental mole cricket, and the Oriental mole cricket is common and harmful. Mole crickets occur once every 1-2 years, and adults or nymphs overwinter underground, and the damage is serious in spring and autumn.

It prefers humid environment, and is more seriously affected by riverside, damp vegetable fields and loose and damp sandy loam vegetable fields. It is nocturnal and nocturnal, with a peak of active feeding from 9 p.m. to 3 a.m., often on the topsoil or the ground, and even more so after rain. It has phototaxis and moisture-loving properties, and has strong tropism to sweet substances such as fried soybean cakes, wheat bran and horse manure.

Generally, 10-20cm topsoil is most active when it is wet.

Main prevention and control methods:

Poison bait booby-trapping. Cook with wheat bran, soybean cake, cotton nut cake, rice bran 5kg until three mature and dry to semi-dry, add 48% Lesben EC or 50% phoxanthion EC 50-100ml or add 90% dichlorophos 50g, 30 times the water is mixed into a poisonous bait, each mu is used to sprinkle on the surface in the evening, or after the emergence of the poisonous bait is sprinkled in the tunnel where the mole cricket is active, which can also treat grubs, needleworms, crickets, etc. Poison bait orange shouting can also be mixed with 40% Lesben emulsifiable concentrate 500ml of water 10 times and 50kg of bait, or 4% dimere powder and bait according to 1:

5. Mix. Soil treatment. In the seedbed or vegetable field with serious damage of mole crickets, 2-3kg of 5% phosphine granules or l0% diazinong granules per mu are mixed with 15-30kg of fine soil and sprinkled on the bed soil, sowing ditch or transplanting hole, and covered with soil after sowing and vegetable seedling transplanting. The seedbed can also be irrigated with 30 times of 80% dichlorvos EC or 800-1000 times of 50% phoxanthion EC.

Light booby-trap. In the windless and sultry evenings of summer and autumn, various insect trap lamps are used to attract adult insects, combined with manual capture. In addition, nests can be artificially dug in early spring or summer to kill insects or eggs.