What are the common diseases of garlic identification and prevention methods?

1. Leaf blight.

Leaf blight disease will damage the leaves and peduncles of plants, which will cause gray-white or gray-brown lesions on the leaves of garlic, and in severe cases, the plants will wilt and die.

2. Purpura disease.

Purple spot disease will make the leaf tips and peduncles of the plant grow small white spots, the spots will become spindle or oval purple spots after expansion, when breeding garlic, you need to drain the water in the soil for the plant in time after the rain, so as to avoid garlic rot and infection.

3. White rot.

White rot causes the leaves of the plant to turn yellow, resulting in the appearance of white hyphae on the bulbs of garlic.

To prevent white rot, you need to spray carbendazim on garlic every other week.

Chemicals to destroy germs on the surface of the plant, and to remove the rotten garlic to avoid infection.

4. Epidemic disease. Blight will cause white to yellow watery spots on the leaves of the plant, and the expansion of the lesions will cause the whole leaf to wilt and die, when cultivating garlic, it is necessary to choose to plant on higher ground and well-drained plots, and put the garlic seeds in potassium permanganate solution.

Disinfect to reduce the chance of disease infection of the plants.

Leaf blight, root rot, rust, purple spot, white rot, blight, bacterial soft rot, sclerotinia sclerotinia disease.

Leaf blight: It causes harm to garlic leaves and peduncles, and the lesions on the leaves are water-stained in the early stage, and the leaf color gradually decreases, and the leaf surface appears gray-white and slightly concave round spots. The lesions enlarge and turn grayish-yellow to grayish-brown, with dense black-brown mold on the surface.

When the onset of peduncle is severe, the plant growth is weak, the dwarf yellow of the aboveground part shrinks or even dies early, the sprout is withdrawn late or not, the yield of garlic and garlic sprout is reduced, and the appearance quality is greatly reduced. <>

Root rot: mainly damages rhizomes, and damages bulbs during storage. Cause the plant to be dwarfed and the leaves to turn yellow; The root system is yellow and rotten, the garlic head is small, and in severe cases, the whole plant dies.

Rust: mainly damage leaves and false stems, the disease part is oval green spot at the beginning, and then a round or oval slightly convex summer spore pile appears under the epidermis, when the disease is severe, the disease spot causes the whole leaf to wither in succession, and the plant dies in advance.

Purple spot disease: mainly harms leaves and peduncles; The onset usually begins at the tip of the leaf or in the middle of the peduncle; Small white spots that are slightly concave at first, **slightly purple, spindle-shaped after enlargement, with many concentric wheel patterns; When the humidity is high, black mold appears on the diseased area. <>

White rot: severe occurrence in spring; It mainly harms leaves, leaf sheaths and bulbs; The leaves are diseased, the tips of the outer leaves are yellow, gradually develop to the leaf sheath and inner leaves, and then turn yellow and die; The bulb is diseased, and the epidermis of the diseased part is water-soaked with a gray-white hyphaal layer, which is white and rotten, and will also produce small black sclerotia; Patches of fields often die.

Blight: mainly affects leaves; Begins at the tip of the leaf, or in the middle of the leaf; white to yellow water-soaked lesions initially; When the humidity is high, the lesion develops quickly, and in the later stage, it will cause half of the leaf or the whole leaf to die.

Bacterial soft rot: mainly damages leaves; Onset begins in the lower lobe; Yellowish-white streaks appear from the leaf margin or midrib at the initial stage; When the humidity is high, the diseased part is yellow-brown and wet rot, and finally the whole plant dies. <>

Sclerotinia sclerotinia disease: mainly harms the base of pseudostems and bulbs; At first, the diseased part is water-soaked, and then darkened, and the ulcer is rotten; and accompanied by a strong garlic odor; When the humidity is high, the disease grows white hairy hyphae; After the leaf sheath rots, the upper leaf wilts, gradually yellows and dies; The garlic is scattered, and the garlic roots and roots are rotten.

1. Garlic leaf blight.

Garlic leaf blight is manifested as yellowing at the tip of the leaf, with stripes running through the whole leaf on the leaf, developing along the middle rib or located on one side of the leaf, and the lesion becomes gray-yellow or gray-brown after enlargement, and the surface of the lesion is densely covered with black-brown mold when the air humidity is high. Viral diseases are manifested as obvious mosaic leaves on the leaves, sometimes with green or yellow stripes, twisted and deformed leaves, and yellowish leaf tips.

Control methods: strengthen cultivation management, cultivate robust plants, and enhance disease resistance. Strengthen field drainage, reduce field humidity, control disease conditions, and avoid damage to leaves during field operations, so as to reduce wounds and avoid human transmission of diseases in the field.

In the early stage of the disease, spray mu with 500 1000 times of 20% virus A2 wettable powder or 1000 times of phytolingling emulsifiable concentrate to prevent virus disease. Use 50% Suclin wettable powder 800 1000 times liquid or 50% promethane wettable powder 800 times liquid, 70% mancozeb wettable powder 500 times liquid to control garlic leaf blight.

2. Bacterial soft rot.

After garlic is infected, it first occurs from the leaf margin or midrib, and forms yellowish-white stripes along the leaf margin or midrib, which can run through the entire leaf. When the humidity is high, the diseased part is yellow-brown and soft rot. Generally, the foot leaves first develop the disease, and then gradually expand to the upper leaves, causing the whole plant to wither or die.

Prevention and control methods: At the onset of the disease, it can be sprayed with dimethane, copper ammonia, Bacillus subtilis, etc.

3. Garlic sclerotinia sclerotinia disease.

The diseased site is at the base of the garlic pseudostem under the membrane, and the initial lesion is water-stained, and later becomes gray-white, the ulcer is rotten, and the rotten part emits a strong garlic odor. After the garlic leaf sheath rotted, the upper leaves showed wilting, and gradually yellowed and died, and the garlic roots and root plates rotted and scattered.

Prevention and control methods: After the onset of the disease, it can be sprayed with mold, iprodione, pyoxymyceclamine, pyridoxamine and other agents.

4. Phytophthora root rot.

The pathogen mainly damages garlic roots and bulbs, the roots are water-stained and gradually brown and rot at the beginning of the disease, and after the bulbs are cut, the bulbs close to the root plate turn brown; The leaves of the infected plants gradually turn yellow from the bottom upwards, dry up and die, the plants are obviously dwarfed, the garlic sprouts are thin and short or do not sprout, and the severely diseased plants cannot form yield or the whole plant dies.

Prevention and control methods: After the onset of the disease, it can be prevented and controlled by spraying the base of the stem such as copper ammonia, Bacillus subtilis, and Chlormycofen.

5. Grow flies in green onions.

The larvae eat into the garlic bulbs, causing rot, yellowing of the leaves, wilting, and even death in patches.

Prevention and control methods: mainly through pre-sowing soil treatment, pesticide seed dressing, initial spraying, etc., effective agents include phosphine, chlorpyrifos, etc.

Common diseases of garlic are leaf blight, purple spot, white rot, blight, ** leaf blight, need to immediately pull out the diseased garlic seedlings, and then spray fungicide on the plant, when preventing and controlling purple spot disease, it is necessary to discharge the water in the soil for garlic in time after the rain, and ** white rot, you need to spray carbendazim on the garlic seedlings.

1. Leaf blight.

The common diseases of garlic are leaf blight, leaf blight disease will harm the leaves and peduncles of the plant, which will cause the leaves of garlic to grow gray-white or gray-brown lesions, and the serious situation will make the plant wither and die.

2. Purpura disease.

Purple spot is a common disease of garlic, it will make the leaf tips and peduncles of the plant have small white spots, the spots will become spindle or oval purple spots after expansion, when breeding garlic, it is necessary to drain the water in the soil for the plant in time after the rain, so as to avoid garlic rot and infection.

3. White rot.

The common diseases of garlic are white rot, white rot will make the leaves of the plant yellow, resulting in white hyphae on the bulb of garlic, if you want to prevent white rot, you should spray carbendazim on garlic every other week to eliminate the germs on the surface of the plant, and the rotten garlic should be pulled out to avoid infection.

4. Epidemic disease.

Blight is a common disease of garlic, it will make white to yellow watery spots on the leaves of the plant, the expansion of the lesions will lead to the death of the whole leaf, when cultivating garlic, it is necessary to choose to plant in a higher ground and well-drained plot, and the garlic seeds should be put into potassium permanganate solution for disinfection, so as to reduce the probability of infection of the plant.

Prevention is the main way to prevent garlic rust. First of all, when garlic is planted, the soil needs to be disinfected, and soil disinfection can be combined with deep ploughing. It should be noted that for plots that have had previous outbreaks of garlic rust, the dosage of some killing drugs such as carbendazim can be appropriately increased when suddenly killed.

When sowing garlic, try to choose seeds with no lesions on the surface and a complete and smooth skin. Secondly, when planting in the field, especially in early spring, if there are continuous rainy days, it is necessary to use drugs in advance for prevention, control the concentration of preventive drugs, and avoid excessive drug concentration to cause pesticide damage to garlic. For overwintering garlic, special attention should be paid to watering in a timely manner after turning green, and at the same time the amount of watering should be controlled.

In particular, flood irrigation should not be carried out in the field.

1. Epidemic, the color of the lesion area is white or yellow, showing water-soaked spots, the surrounding part is light green, and the humidity and temperature will accelerate the spread. As the temperature and humidity increase, the affected area extends to the entire leaf. 2. Rust, rust mostly occurs in continuous rainy weather, lesions generally occur on garlic leaves and false stems, at the beginning there will be brownish-green spot shape, slowly turn into round powdery rust spots.

Introduction: In today's society, farmers pay more and more attention to the cultivation of crops, not only need to fertilize and apply pesticides, but also need to pay attention to watering. In order to maintain a good tasting taste of the crops.

Farmers need to take care of it, but it is normal for crops to have pests and diseases, because when growing, it is inevitable to encounter pests and diseases, as well as improper fertilization. SoGarlic planting pest control is very importantWhat are the common pests and diseases in garlic planting? Here, I hope to help you solve the problem.

Leaf blight is a fungal type of disease that is mainly present on diseased remains. Generally, it occurs in the case of heavy rain, and the disease is caused by excessive fertilizer application, and the diseased plant needs to be treated at this time. The fungus mainly infects the leaves and flower stalks of garlic, starting from the tip of the leaf and gradually spreading downward.

This change is manifested by the appearance of white round spots on the leaves, which will further expand after the merger. The anchor spreads all the leaves of the plant, and eventually causes the leaves and stems to turn yellow until they die and break off from the roots. If the garlic is diseased, the farmer should take protective measures in time to avoid affecting other plants.

Botrytis is also a fungal type of disease, which mainly harms garlic leaves, mostly occurs in the middle of the garlic growth period, and the lesions are water-stained and white in color. In the case of severe disease, it is not conducive to the normal harvest of garlic, and the appropriate pesticide is irrigated for garlic treatment. At the same time, farmers also need to go to the field often to observe the growth of garlic to avoid fungal diseases such as gray mold**, which is not only difficult to treat, but also affects other plants.

If such a situation occurs, it is advisable to be prompt**.

In order to prevent the occurrence of this type of disease, farmers need to apply pesticides during the growth of plants, because the disease mainly affects garlic through infection in the soil, and it is necessary to strengthen the management of the field and the rational use of the land. Timely drainage during rains is beneficial to the growth of crops.

Garlic leaf blight, garlic root rot, garlic rust, garlic thrips, garlic maggots, garlic spotted loon flies and so on. These are very harmful to garlic and can also reduce the yield of garlic.

Leaf blight, root rot, rust, thrips, garlic maggots, purple spot, gray mold, yellow spot, etc., should also learn more professional knowledge about the management of garlic.

Common ones are allium thrips, grubs, root maggots, leaf miner ropes, etc., so you can use some organic fertilizer at this time, and be sure to water it in time.