How to treat garlic leaf blight? What are the applicable pesticides for the prevention and control o

Garlic leaf blight mostly starts from the tip of the leaf, the lesion is a pale small dot at the beginning, expands to gray-brown, oval or irregular, with black mold, and the diseased leaf dies when it is severe, and expands upwards from the lower part of the plant. The peduncle is damaged, the symptoms are similar to the leaves, it is easy to break from the diseased part, and finally the diseased part produces many small black spots, and the moss can not be pumped in severe cases. Occurrence of diseases caused by fungi.

The pathogen mainly overwinters in the soil with the diseased residues, and spreads through wind, rain and air currents. It often occurs in combination with downy mildew or purple spot and infects weakened plants. In spring, there is a lot of rainfall, or a lot of watering, the field is humid, the light is insufficient, the terrain is low-lying, the drainage is poor, and the disease is prone to epidemics.

Control measures (1) Select plots with flat terrain and good drainage, apply enough organic fertilizer and phosphorus and potassium fertilizer, and add micro-fertilizers such as potassium dihydrogen phosphate, Tianda 2116 and Yunda 120 in the growing season to improve plant disease resistance. (2) Remove the diseased and residual plants in time, and bring them out of the field to burn or bury them deeply to reduce the source of bacteria. (3) Spraying prevention and control in the early stage of the disease.

The agent can be sprayed with 40% carbendazim glue suspension per mu plus kilogram of potassium dihydrogen phosphate, 60 kg of water, or 1500 times of 50% promethine wettable powder, 800 times of 60% Baitai dispersible granules, 1500 times of 25% azine lipid suspension, 1500 times of 10% difenoconazole dispersible granules, 500 times of 50% copper succinate fatty acid (DT) wettable powder, L:L:100 Bordeaux liquid, etc., sprayed once every 7-10 days, alternately, 3-4 times in a row.

Garlic leaf blight occurs on leaves and peduncles. At the beginning of the disease, it is a small white dot, and then expands to an irregular or oval gray-white or gray-brown lesion, and black mold grows on it, and in severe cases, all the diseased leaves die, and many small black grains are scattered on it. When the damage is serious, the whole plant does not smoke moss.

Prevention and control measures: 1. After the garlic is harvested, the diseased residues should be removed in time, burned or buried deeply, and the soil should be disinfected by spraying disinfectants, and the new high-fat film should be sprayed to enhance the efficacy and greatly improve the utilization rate of the active ingredients of the chemicals.

2. Reasonable crop rotation, deep soil turning, application of sufficient base fertilizer, seeds should be treated before sowing, 50% carbendazim wettable powder can be added to the new high-fat film 800 times liquid (can repel underground pests and diseases, isolate virus infection, strengthen seed respiration intensity, improve seed germination rate), prevent seeds from carrying pathogens.

3. Strengthen field management, reasonable fertilization, reasonable dense planting, timely ditching and drainage, reduce temperature, timely spraying of strong stems in the growth period, and at the same time, it should also be sprayed at the gestational stage to enhance plant disease resistance and improve garlic yield.

4. Timely prevention and control, in the early stage of the disease, 1 2 250 times (copper sulfate: lime: water) times of Bordeaux solution and 75% chlorothalonil 500 800 times should be sprayed in time for prevention and control, and at the same time, 800 times of new high-lipid film should be sprayed to enhance the efficacy; or 500 times of 65% zebsen and 800 times of the new high-lipid membrane for prevention and control.

carbendazim, chlorothalonil, green lactone, zebze, prochloraz manganese salt, these pesticides are very effective fruits, and are very suitable choices.

At this time, you can choose phosphate fertilizer, potassium fertilizer and nitrogen fertilizer, and then you can choose organic fertilizer, you can also choose vegetables or cow manure, and you can choose carbendazim when using pesticides.

It can be used with drugs**, mixed drugs**, copper calcium sulfate can also be used**, wettable powder can also be used**, asimeda can also be used**, and dornine can also be used**.

The best method for garlic leaf blight: agricultural control method, chemical control method.

1. Agricultural Prevention and Control Law.

Choose plots with flat terrain and good drainage for cultivation. Crop rotation with other vegetables is practiced. Remove the diseased and residual plants in time, and bring them out of the field to burn or bury them deeply to reduce the source of bacteria.

Apply enough organic fertilizer, phosphorus and potassium fertilizer, and increase micro-fertilizer such as potassium dihydrogen phosphate in the growing season to improve plant disease resistance. Strengthen field management, reasonable fertilization, reasonable dense planting, do a good job of ditching and drainage, reduce field humidity, and enhance plant disease resistance.

2. Chemical control method.

Garlic seeds are dressed or soaked with chemicals: Garlic is peeled and 50% carbendazim wettable powder is used, and the dosage is the weight of garlic seeds.

Spray control: per 667 square meters, use 0:15 kg of 40% carbendazim gel suspension plus kilogram of potassium dihydrogen phosphate, add 60 kg of water to spray evenly, or spray with 50% iprodione wettable powder, 500 times of copper bupentadi, 600 800 times of zebsen, 600 800 times of 75% chlorothalonil wettable powder, etc.

Field management of garlic

1. Seedling stage.

There are two main aspects of garlic before wintering, first, break the membrane and carry the seedlings. After the garlic emerges, some seedlings can break through the film, and the remaining seedlings use iron hooks to break the film in time so that the seedlings can grow normally. Second, water the winter.

Garlic is watered before winter, which can stabilize soil temperature, alleviate drought and reduce the occurrence of frost damage.

2. Rejuvenation.

After the garlic returns to green, watering and topdressing begins in late March. Garlic top dressing can be used with compound fertilizer 30 40 catties, flushed with water. Spring is the high incidence period of pests and diseases, so it is necessary to apply pesticides in advance to prevent and control them.

3. Sprouting stage.

When garlic enters the growth period of garlic sprouts, garlic sprouts and garlic sprouts grow at the same time, and sufficient water and fertilizer should be ensured during this period. 30 kg of urea and 20 kg of compound fertilizer can be applied with water. When the upper part of the garlic sprout is bent and protrudes 8 15 cm from the leaf mouth, the sprout is picked.

4. Bulb growth period.

During the growth period of garlic bulbs, it is necessary to prevent premature leaf senescence, keep the soil moist, and promote the expansion of garlic. When watering, 30 kg of compound fertilizer was applied, and potassium dihydrogen phosphate and brassinin were sprayed on the foliar surface to prevent premature leaf aging. Generally, after 18 days of harvesting, the leaves turn gray-green, the plants are soft, and the garlic should be harvested in time after the swelling.

Summary. Garlic leaf blight is one of the common diseases on garlic, mainly harming the leaves, in the early stage of infection, white round spots appear between garlic leaves, and gradually develop to the leaf stems, and the lesions also expand to gray-brown, irregular oval. The affected area is often accompanied by black mold, and there are small black spots on the lesions.

Severe disease often causes diseased leaves to die, plant premature senescence, garlic yield reduction, garlic moss mold rot, which directly affects the yield.

How to cure garlic leaf blight? 1.Selection:

Different garlic species have different disease resistance, so it is necessary to buy detoxified garlic, disease-resistant garlic, disease-free and robust garlic seeds, and select garlic species before sowing. 2.Seed dressing:

The use of garlic seed dressing agent for seed dressing, haha send the spring, summer, autumn and winter garlic seed dressing can effectively prevent and control the pests and diseases encountered in the growth process of garlic, achieve the effect of garlic prevention and control throughout the growth period, ensure the increase of garlic production, increase income and improve the quality of garlic; 3.Choose a field with flat terrain and good drainage performance to plant garlic, and apply enough rotted farmhouse fertilizer and phosphorus and potassium fertilizer to improve the stress resistance of garlic when planting garlic. 4.Once the infected plant appears, it should be taken out of the field immediately for removal; 5.

Mulching reduces soil moisture evaporation, increases ground temperature, reduces the frequency of irrigation and the chance of germ transmission; 6.Pesticide control: application of mancozeb or chlorothalonil.

Garlic seedling leaf blight is very serious.

Garlic leaf blight is one of the common diseases on garlic, mainly harming the leaves, in the early stage of infection, white round spots appear between garlic leaves, and gradually develop to the leaf stems, and the lesions also expand to gray-brown, irregular oval. The affected area is often accompanied by black mold, and there are small black spots on the lesions. Severe disease often causes diseased leaves to die, plant premature senescence, garlic yield reduction, garlic moss mold rot, which directly affects the yield.

How to cure garlic leaf blight?1.Selection:

Different garlic species have different disease resistance, so it is necessary to buy detoxified garlic, disease-resistant garlic, disease-free and robust garlic seeds, and select garlic species before sowing. 2.Seed dressing:

The use of garlic seed dressing agent for seed dressing, haha send the spring, summer, autumn and winter garlic seed dressing can effectively prevent and control the disease and late fiber insect pests encountered in the growth process of garlic, to achieve the effect of garlic prevention and control throughout the growth period, to ensure the increase of garlic production, income and improve the quality of garlic;3.Choose a field with flat terrain and good drainage performance to plant garlic, and apply enough rotted farmhouse fertilizer and phosphorus and potassium fertilizer to improve the stress resistance of garlic4.Once the infected plant appears, it should be taken out of the field immediately for removal; 5.

Mulching reduces soil moisture evaporation, increases ground temperature, reduces the frequency of irrigation and the chance of germ transmission; 6.Pesticide control: application of mancozeb or chlorothalonil.

If you have any questions, please feel free to ask.

I hope mine can help you, if you are satisfied with my service, please give a thumbs up, I wish you all the best!

If the leaves of garlic seedlings have blight, if it is very serious at this moment, you can use the method of cleaning the countryside, strengthening the method of field management and chemical control. Due to the different severity of garlic seedling leaf blight, the causes are different, and the final method may be different.

01 When the garlic seedlings and leaves are blighted, after the garlic is harvested, it is necessary to remove the diseased leaves and stems in the field in time. Generally, after ploughing the field, the straw is used to cover it, and the pathogens are burned to death in time by burning the straw.

02 Of course, field management is also required, and garlic seeds are generally peeled first before planting garlic. If there are garlic stems, stems, etc., left from before, be sure to take them out of the field, so as to avoid infection conditions as much as possible.

03 If the garlic seedling leaf blight is more serious, you can use drugs for sterilization and disinfection under the guidance of professionals. If conditions permit, professionals can be hired to check the specific situation in the field.

04 At present, there are many reasons for the leaf blight of garlic seedlings, and if the pathogen has been spread in the field, it needs to be dealt with in time. At present, the way of field transmission depends on air currents, rainwater, stomata and so on.

Sunlight exposure should be carried out in advance, and fertilization and watering should be carried out every day, and drainage should be done in the later stage to ensure that such disasters can be avoided.

1. It is necessary to strengthen field management and adopt formula fertilization to enhance host disease resistance.

2. Drain water in time after rain, water properly, control the humidity in the field, and avoid garlic cultivated land in a state of high humidity and rotten roots.

3. Choose reasonable agents for prevention and control. In the early stage of the disease, you can choose 600 times of 75% chlorothalonil wettable powder, or 1500 times of 50% iprodione wettable powder, generally from the beginning to mid-April, spray once every 10 days, 2 3 times in a row.

Some pesticides can be sprayed, as there are some pesticides that are specifically designed to control garlic leaf blight.

Garlic leaf blight disease can be controlled with zeb, chlorothalonil and iprodione.

Most of the internal fungicide control, spray once every 7 10 days, and 3 4 times in a row, which can ensure the smooth swelling of garlic and the normal expansion of bulbs. At the same time, it can be used together with plant growth regulators amine fresh ester, brassin, benzylaminopurine and amino acid-containing water-soluble fertilizer to enhance the stress resistance of garlic and strengthen the jujube plant.

Strengthening garlic field management:

Peeling the seed coat: Before the garlic is planted, the garlic seed coat should be peeled off and the seed coat and stem should be taken out of the field to reduce the conditions for pathogen infection.

Cultivation plot: The cultivation plot should be high, not waterlogged, divided into compartment cultivation, compartment width, compartment surface is turtle back shaped, and the compartment ditch should be straight to facilitate drainage.

Planting density: reasonable planting density, cultivated in rows, conducive to ventilation. Remove weeds in the field in time and enhance ventilation and land light.

Proper fertilization: timely drainage after rain. Apply plantar fertilizer, nitrogen, phosphorus and potassium should be used together, increase potassium fertilizer, apply organic active fertilizer or seaweed fertilizer, and improve the disease resistance of garlic.

Post-harvest processing:

In addition, after the garlic is harvested, the diseased leaves, stems and other diseased residues in the field are removed in time to reduce the number of pathogenic bacteria in the field.

Symptoms of garlic leaf blight:

1. At the beginning, it is a small white dot with flowers, and mostly starts from the tip of the leaf. The lesions are irregularly shaped and grayish-white when enlarged, and black mold is produced on the lesions when wet, and changes from grayish-white to grayish-brown.

2. Disease spots start from the tip of the leaf, expand from top to bottom, dry up along the tip when light, and die even the whole plant when it is severe.

3. The peduncle is easy to break off from the diseased part, and finally emits many small black particles in the diseased part, and does not smoke the sprout when the harm is serious.