How to prevent maggots from appearing in green onions?

In the process of transplanting green onions, the farmhouse fertilizer should be fully fermented and rotted to kill the eggs. When fertilizing, the organic fertilizer should be fully decomposed, and the soil should be covered deeply, and more grass and wood ash fertilizer should be applied to avoid green onions, flies and maggots, and pesticides should also be sprayed regularly for prevention and control.

Be sure to spray the insecticide in advance, and water less, be sure to ventilate more, and you can spray some urea.

It is necessary to apply fertilizer in time, apply more grass and wood ash fertilizer maggots, flies and insects, and irrigate the roots with 40% dimethoate and 800 1000 times liquid.

Summary. To solve the problem of onion maggots, prevention should be the mainstay, prevention and control should be combined, especially pay attention to the early prevention as follows:

First, use EM bacteria to make the bottom fertilizer of chicken manure treatment (EM bacteria can also be used for soaking, dipping roots and flushing, can make the plant robust and good quality, good taste), reduce the breeding of insect eggs, if possible, can gradually replace chicken manure with pig and sheep manure, because pig and sheep manure, especially sheep manure has a natural avoidance effect on onion maggots;

Second, when arranging crop planting, we should pay attention to stubble;

Third, if you encounter continuous rainy weather, you should pay attention to the sunny day, turn the soil in time, dry the soil, and make the soil soft and breathable.

Fourth, pay attention to the prevention and control of pests such as leaf miner flies and reduce insect eggs.

What to do if the shallots have maggots.

To solve the problem of onion maggot to prevention, prevention and control combined, especially to pay attention to the early prevention as follows: first, use EM bacteria to do the chicken manure of the bottom fertilizer of the shed tung tree (EM bacteria can also be used for soaking, dipping roots and flushing, can make the plant robust and good quality, good taste), reduce the breeding of insect eggs and liters, if possible, you can gradually replace chicken manure with pig and sheep manure, because pig and sheep manure, especially sheep manure has a natural avoidance effect on onion maggots; Second, when arranging crop planting, we should pay attention to stubble; Third, if you encounter continuous rainy weather, you should pay attention to the sunny day, turn the soil in time, dry the soil, and make the soil soft and breathable. Fourth, pay attention to the prevention and control of pests such as leaf miner flies and reduce insect eggs.

After the occurrence of onion maggots, follow the following operations: when allium maggots do not occur or occur in small amounts, matrine can be used to transport the ridge (preferably produced by regular manufacturers, which can be used) with cypermethrin (concentration irrigation, or spraying and applying pesticides at the boundary between green onions and soil, and effectively curbing the continued reproduction of allium maggots when it is infiltrated.

Diseases of maggots in green onions:

The stems of onions and garlic are bored into pores, causing rot, yellowing of leaves, wilting and even dead seedlings. Leeks are harmed early, the first knife leeks can be harmed, the second knife is the heaviest, and then gradually reduced, garlic is the most affected in the "rotten mother and child" period. The larvae can be turned into a pest, so they are extremely harmful.

Maggot control method of green onion:

1.Agricultural control: do not apply fertilizer without rotting before sowing, deep ploughing after fertilization, cover the soil after fertilization, do not expose fertilizer, do not expose seeds, prevent adult eggs from laying eggs, use less manure when dressing, use chemical fertilizer instead, to reduce adult eggs, and apply ammonia to reduce maggot damage.

2.Pesticide control: in the adult stage, spray once every seven days or so, with 2.5 percent trichlorfon powder, three to five catties per mu, or 90 percent of trichlorfon 1,500 times; It can also be watered with 90% trichlorfon three to four catties per mu and watered; It can also be sprayed with 90% of trichlorfon 1,000 times liquid to poison the larvae, and the effect is very good.

The article is excerpted from Shandong Xinrun Seed Industry, which sells high-quality green onion seeds.

That's it for you, I hope it can help you.

There are many drugs that can be used to control maggots, but in recent years, chloronicotinoid insecticides have performed relatively well, and you can try two or three different types of insecticides. Prevention and control agents:

1. Insect growth regulators: lice mite urea, flubol urea, fluridine urea, mosquito and fly ether, fly amine, larval urea.

2. Neonicotinoids: imidacloprid, clothianidin, thiamethoxam, dinotefuran, 3. Organophosphorus: chlorpyrifos, phoxanthion.

4. Plant pesticides: nicotine, matrine, azadirachtin.

5. Pyrethroids: Kung Fu.

6. Carbamates: carbofuran, carbofuran 7, others: carbofuran.

With these two plants, choose any one to mash and soak in water, grass: water about 1:5-6, with leaching solution can be watered, this is an environmentally friendly method.

Watered with 80% dichlorvos 1200-1600 times, this money is not environmentally friendly, and there may be pesticide residues.

Maggots are easier to control.

908% crystalline trichlorfon 1000 times liquid irrigation roots.

48% Lesben EC 1000 times liquid.

50% phosphine emulsifiable concentrate 800 times liquid irrigation roots.

Two times in a row can usually be cured.