There are many pests and diseases of red garlic, how to prevent and control red garlic pests and dis

Root maggot (garlic maggot): After the occurrence of garlic field, inject 4000 times of pyrethrin solution or avermectin solution into the root soil; Adults can also be trapped, the proportion is 6 parts of sugar, 3 parts of vinegar, 1 part of liquor, 1 part of 90% trichlorfon powder, mix evenly in a pot, put it in the field, and wait for a sunny day to trap it. When pouring green water on garlic, apply pesticides to control garlic maggots with water, such as phosphine, cyfluthrin + clothianidin, avermectin and other pesticides for garlic maggots!

When flushing, it must be applied evenly, so that it can play the purpose of prevention and control!

It is recommended to pair it with cyhalothrin! In the control of blackhead maggots, when clothianidin, thiamethoxam, and matrine are used, because they are mainly caused by internal gastric toxicity, the dead worms are slow. In addition, pay attention to the temperature, the effect below 20 is not good, it should be paired with cypermethrin, etc.!

Purple spot lesions usually start in the middle of the leaf tip and can extend to the lower part after a few days. In the initial stage, the lesions are very small, slightly sunken, yellow-brown to brown, and when the humidity is high, the disease is full of brown to black powdery mold, and the lesions are often arranged in the form of concentric rings, and the lesions are often healed into long strip-shaped large spots, resulting in leaf death.

The main prevention and control measures are: cleaning the farmland, after the harvest of the previous crops, all the residual branches and fallen leaves should be cleared out, and the soil should be turned deep to eliminate the source of insects. Spraying effective insecticides in the field before the adults lay eggs can effectively reduce the chance of adults laying eggs in the field, thereby reducing the occurrence of insect infestations.

In the early stage of garlic leaf blight, 75% chlorothalonil wettable powder 600 times, 25% 100g emulsifiable concentrate 1500 times, 50% promethanin wettable powder 1500 times can be used for prevention and control; Bacterial heart rot can be prevented and treated with bacterial fungicides such as 2000 times of copper master wettable powder or 77% liquid of ultrafine powder 700 times. When planting, do not be too dense, strengthen field management, remove disease residues in time, and concentrate on treatment, get it in time at the beginning of the disease, spray it with 75 chlorothalonil wettable powder 600 times or 70 mancozeb wettable powder 500 times, pay attention to spraying on the root of the plant stem close to the surface.

Choose varieties of high-quality and disease-resistant seeds, fertilize them in time, and supplement them with sunlight and water.

It can be controlled by pesticides. Pesticides can kill pests on red garlic.

Pesticides. Because after the pesticide is applied to the red garlic in my house, there are no pests and diseases, so it should be controlled by pesticides.

Garlic gray mold mainly damages the leaves that are light brown at first and then turn grayish-white, and when the humidity is high, it will rot in the form of water stains. Garlic white rot, also known as garlic blast, is mainly harmful to leaves, leaf sheaths and bulbs. Reducing pathogens and reducing the number of pathogens in the garlic growth environment is the basis for preventing the occurrence of diseases.

In the process of pollution-free pest control of garlic, this is a measure to draw wages from the bottom of the kettle. Most of the measures to reduce pathogens are agricultural. Does not pollute or rarely pollutes garlic and the environment.

Garlic virus disease, also known as mosaic disease, is mainly caused by garlic mosaic virus and garlic latent virus. When sowing, if the selection is not strict, the garlic cloves are poisonous, and the cultivation management is not scientific, the virus disease will be transmitted through thrips, aphids and other pests. Especially in the case of drought, high temperature and other adverse growth environments, purple spot disease mainly harms garlic leaves.

At the beginning of the disease, it appears as small white spots in the form of water stains, which gradually expand to brown or dark purple and form soft rot. Especially on rainy days, the onset of illness is severe.

Botrytis is more likely to occur in the later stages of plant growth. At the beginning of the disease, there are small green white spots on both sides of the garlic seedling leaves, which become elongated or fusiform spots that expand along the veins, and generally expand from the leaf end downward, resulting in half of the leaves withering and yellowing. The lesions are water-stained at first, and then turn white to light gray-brown, leaf blight is a common disease in the growth process of garlic, which mainly harms garlic and affects the yield of garlic after it occurs.

Prevention and control methods: the onset of the disease generally occurs in mid-April, if it is found, 100 grams of chlorothalonil wettable powder should be applied in time, diluted with water and sprayed to prevent and control.

Botrytis cinerea: After the central diseased plant is found in the field, it should be removed or treated in time with 1500 times of 50% Sukrin wettable powder, or 1000 times of 50% promethane wettable powder. Spray mancozeb, zebzeb, pyraclostrobin, thiophanate-methyl, etc. every half a month or so, which plays a role in leaf preservation.

At the same time of spraying pesticides, it is recommended to use potassium dihydrogen phosphate and brassinolide to improve the stress resistance of crops.

Common pests and diseases that occur in red garlic are leaf blight and garlic maggots. These pests and diseases can be sanitized with commonly used chlorothalonil and phosphine. Pests and diseases have a great impact on the growth of red garlic, and doing a good job in pest control is very beneficial to the yield and quality of garlic.

Spots: The disease is mainly manifested in the appearance of garlic sprouts before the sprouts, the skin of garlic sprouts appears spots, with white spots, yellow spots, red spots, etc., resulting in the rot or mildew of garlic sprouts.

The leaves turn yellow, wilt and die: this is a serious disease of red garlic. Once the disease appears, it will spread, and even large or entire areas will wilt and die.

Red garlic sprouts are red or flowering: The sprouts of good garlic sprouts are greenish and do not bloom, while the diseased garlic sprouts are red and blooming as soon as they emerge and are not bent down.

1.Sclerotinia sclerotinia sclerotinia sclerotiorum, 2Garlic leaf blight, 3Garlic bacterial soft rot, 4Garlic paralysis, 5Garlic mites.

When the humidity is high, the lesions rot and produce a sparse white mold. In this regard, garlic growers should carry out timely pesticide prevention and control in the early stage of disease under the premise of high furrow cultivation to prevent moisture, and the pesticide can be controlled with methamethoxin or magenta. Garlic has not been planted in fertile soil for more than 10 years.

It can reduce the number of pathogenic bacteria in the bed soil and reduce the infection of diseases. Through the disinfection of the seedbed soil, such as plowing and exposure to the sun in the sun, mixed with nitrobenzene, or soil fungi and insect sterilization and other pesticides.

Garlic is an overwintering crop, and the common diseases mainly include gray mold, leaf blight, purple spot and yellow spot of garlic sprouts. The main insect pests are aphids, root maggots, allium thrips, etc. I myself have a fruit garlic and we discuss spot disease together:

Spray 70% mancozeb wettable powder at the initial stage of the disease; or 75% chlorothalonil wettable powder 500 times liquid, or 64% alum wettable powder 400 500 times liquid. Once every 7 10 days, spray 2 times in a row.

The main insect pest of garlic in the whole growth and development cycle is garlic maggots! For garlic maggots, it is really a headache for every garlic farmer. The harm of garlic maggot is too powerful, for example, in recent years, garlic maggot has exploded in a large area, and has evolved into a "black-headed maggot" to plant garlic in rural areas, the main diseases are garlic leaf blight, bacterial soft rot, purple spot, blight, rust, etc., and the insect pests are mainly ground maggots and leaf miner flies.

Downy mildew, purple spot, rust, yellow dwarf, soft rot, gray mold blight, white rot, anthracnose, leaf mildew and black spot are the main diseases of green onions. Garlic is a biennial herbaceous plant in the genus Allium in the lily family, with seedlings, flower stems and bulbs as the main edible organ parts. Garlic can produce garlic yellow, green garlic, garlic sprouts, and ripe garlic, which is a very important and affordable vegetable in life.

Choose the best garlic species. Select high-quality plump and robust garlic seeds with no disease spots, no insect holes, no trauma, no mildew, and consistent maturity to improve their own stress resistance and reduce the harm of diseases and insects.

There are root maggots, leaf miner ropes, grubs, allium thrips, allium flies, spotted loon flies, and seed flies are the main pests of red garlic, so when planting red garlic, we must do a good job of pest protection in advance.

Ordinary people often see, insect pests are leaf blight, soft rot, blight and some pests, which will affect his growth, so you can choose some better varieties to improve their disease resistance, you can also buy some pesticides to kill these pests.

Leaf blight, gray mold, allium thrips, leaf miner rope, grubs, but if you don't pay attention to land management and don't do a good job of water and fertilizer measures, it will cause such pests and diseases.

The most common garlic in the growth period is red leaf blight, the incidence of this kind of disease is particularly high, serious can make the whole garlic seedlings wither and die, this is because there is no advance prevention and management of the soil when planting garlic, so we must do a good job of prevention and control in advance, followed by in winter, both in mid to late November of the solar calendar, when the temperature is about 10 during the day, spray fungicide + brassinolide + potassium dihydrogen phosphate to improve the frost damage resistance of garlic.

Garlic is a relatively cold-tolerant crop that can tolerate short-term -10 low temperatures. If the low temperature below -10 is long, or the extreme low temperature weather, the low temperature root fertilizer absorption ability is reduced, and the absorption of nutrients is hindered and the phosphorus deficiency is caused, garlic is very prone to freezing and seedling death, garlic purple spot, leaf blight, coal spot, rust, gray leaf spot, bacterial soft rot, mosaic disease, virus disease, dry rot, blight, paralysis. All diseases do not have red tip symptoms.

For this reason, it may be mismanaged, which is related to the amount of nitrogen, phosphorus and potassium fertilizer, and the soil is tested and fertilized before cultivation.

Caused by a significant change in temperature! Recently, garlic is in the rejuvenation period of fruit expansion, some time ago, the continuous high temperature, so that the garlic vegetative growth is vigorous, and the recent temperature suddenly dropped significantly, low temperature caused the top of the stool leaves to purple! It is necessary to prepare more farm fertilizer, especially chicken and duck manure, which is the most abundant in phosphorus and potassium fertilizer.

Then there is plant ash, if not, only the application of phosphorus and potassium compound fertilizer. These fertilizers are generally applied as base fertilizer, as long as the bottom fertilizer is sufficient, it is rarely fertilized in the later stage.

First of all, when choosing garlic species, it is best to choose garlic without disease, keep it as garlic species, or buy new garlic varieties directly. When planting garlic, try to choose to dress garlic seeds as much as possible. After the beginning of spring in the following year (high humidity environment, temperature between 15 and 25 °C), ascospores are produced to cause initial infection, and later diseased conidia are produced to re-infect with air flow and raindrop splashing.

Conidia produced on diseased residues after the emergence of garlic seedlings sown in autumnWith the airflow.

In this case, small spots will gradually appear on the leaves, and then slowly expand until they spread throughout the strain. Proper dense planting can improve the ventilation of red garlic, thereby reducing the possibility of disease. Second, it is necessary to remove the leaves of the diseased tips frequently to reduce the risk.

1) Strict selection of seeds, as far as possible to establish the original seed base; Garlic (garlic cloves) in mild areas are used as seeds to reduce the rate of bulb poisoning.

2) Promote the high-body culture of vegetative stem tips and reproductive shoot tip meristems to remove major viruses in garlic bulbs.

3) Avoid adjacent or continuous cropping with allium plants such as onions and leeks to reduce natural spread in the field.

Pesticides. Because after the red garlic in my house is sprayed with pesticides, there is no mosaic disease, so pesticides should be used to prevent it.

Pesticides should be used to control them, because pesticides are very suitable for this pest and disease, and then they can increase yields.

After the occurrence of garlic red rot, one or several garlic cloves of the bulb are brown in color, showing irregular depressions with reddish mold spots on them. In the later stage, the lesions become brown and soft, and the disease is dry and rotten, gradually expanding to the whole garlic cloves, and the garlic cloves are dry and shriveled. Disease causes, storage and transportation conditions play a key role in the occurrence of garlic diseases.

Poor intrinsic quality of garlic, decreased vitality or mechanical damage during harvesting, storage and transportation are all important internal factors of the disease. The main external conditions are poor ventilation during storage, and the garlic is hot and humid. Preventive measures pay special attention to the harvesting and storage of bulbs, try to avoid mechanical damage to reduce wounds, and should not be harvested after rain, fog or wet dew.

Strengthen the management of the storage period. The storage temperature is controlled at 5 9 and the relative humidity is about 90%. The storage cellar can be fumigated with 10g m2 sulfur for 24 hours.

Spray 1000 times 70% methyl tobuzin wettable powder or 1500 times 50% benmonyl wettable powder one week before cutting. Garlic soft rot is a bacterial disease. Low temperature and high humidity are conducive to the onset of the disease.

Planting in low-lying plots of waterlogged land can aggravate the condition. In particular, fields that are sown early, poorly drained or overgrown are seriously ill and can be relieved by drought on their own. Garlic soft rot is mainly caused by pathogenic bacteria on diseased residues in the soil.

The garlic that was sown began to develop in November, and it was sown too early, with too much fertilizer, and the disease was severe, but it grew too big.

Precautionary measures: Choose non-toxic, disease-resistant, disease-free garlic seeds for planting. Before sowing, the garlic seeds are coated with Schler's suspension seed coating, which is the weight of the seeds, which can kill garlic pathogens; It can also be used for seed dressing with 50% carbendazim or 77% fungicide or 77% dorinic wettable powder. The seed dressing method is to mix every 100 grams of drug with 5 kg of water, which can be mixed with 50-75 kg of seeds, and can be sown after mixing evenly and drying.

Choose a soil with flat terrain, convenient drainage and irrigation, rich soil organic matter, strong fertilizer and water retention ability, and non-onion and non-garlic in the front crop. And fine land preparation, so as to achieve a flat and solid condition, in order to block the source of the disease, to avoid the disease. Apply sufficient amount of decomposed organic fertilizer and cake fertilizer to improve the disease resistance of plants and reduce the occurrence of physiological diseases.

Before the onset or at the beginning of the disease, spray 50 kg of 72% agricultural streptomycin 3000-4000 times per mu, 47% gallonon 750 times, or 50% amobamu 1000 times, once every 5-7 days, and control 2-3 times continuously according to the situation. Focus on spraying lightly diseased plants and their surrounding plants, paying attention to spraying to the stem base of the plant. If there are still diseased plants after taking the above measures, 72% agricultural streptomycin wettable powder can be sprayed 400 times, or 77% acaricidal wettable powder 500-800 times, 50 kg per mu, once every 7-10 days, sprayed 2-3 times continuously; Or use 3000-4000 times of neophytomycin, 50% carbendazim, 75% chlorothalonil wettable powder 500-800 times, or 50% methyl tobuzine wettable powder 600-1000 times to drench the roots.