How to prevent garlic leaf blight?

500-700 times of 70% ethylphosphine aluminum-manganese-zinc wettable powder can be used, once every 7-10 days, and 2-3 times in a row.

1) Pre-sowing agent seed dressing and soaking. Peel off the garlic with 50% carbendazim wettable powder, and the dosage is the weight of the garlic seeds.

2) Do not crop continuously, plant other vegetables, clean up the diseased and residual plants in time, burn or bury them deeply, and reduce the source of bacteria.

3) Strengthen field management. Reasonable fertilization, reasonable dense planting, timely ditching and drainage, reduce temperature and enhance plant disease resistance.

Happy Mid-Autumn Festival!

The specific cause of yellowing of garlic leaves

There are many reasons why garlic leaves turn yellow, which can be broadly divided into physiological and pathological. The main causes of physiological yellow leaves are the application of a large number of chemical fertilizers; The soil is too dry, and the lack of water in the plants causes yellow leaves; Garlic lacks trace elements; The main causes of pathological yellow leaves of garlic are leaf blight, wilt, soft rot, root rot, etc.

Microbial fungus fertilizer root boy can not only be used for seedling disinfection, soil disinfection, and root irrigation, but also can be directly absorbed by plant roots, promote plant growth, inhibit the normal growth of pathogenic fungal mycelium or directly destroy pathogens.

Prevention and control methods of garlic yellow leaves

Garlic planting plots should be planted in rotation, which can effectively reduce the occurrence of various diseases. Garlic planting should be sown at the right time, not too early and not too late, so as to avoid yellow leaves and other phenomena. Garlic fertilization is mainly based on well-rotted organic fertilizer, and used with trace elements, and a small amount of topdressing and irrigation is taken many times to prevent the appearance of yellow leaves.

During the garlic planting period, the occurrence of various pests and diseases should be prevented in time, especially the prevention and control of root rot. For root rot plots or damage, flushing or irrigation of root microbial bacteria fertilizer root boys has a good control effect on the prevention and control of root rot, generally used once every 10 15 days.

What is the best medicine for garlic leaf blight

The specific drugs for the prevention and control of garlic leaf blight include chlorothalonil, carbendazim and other drugs. Symptoms of garlic leaf blight: small white dots will appear on the leaves, which will generally start from the tip of the leaf, and then spread rapidly, and in severe cases, the whole plant will die.

Method of medication: spray 75% chlorothalonil wettable powder (500 times liquid) or 50% carbendazim solution at the onset of the disease, and spray it 2-3 times continuously.

Incidence of garlic leaf blight

This bacterium belongs to the genus Stolonus spp. The key to pathogenic bacteria is to be cultivated in the open field (winter) with mycelium or ascomycetes lost in the soil or on the garlic seed coat (of course, there are many bacteria), and ascospores are released before winter or the following spring, causing initial infection, and then the production rate of conidia in the diseased part depends on wind and rain to spread and re-infect.

The temperature of the bacteria is wide to infect the buds, and the environmental humidity is required to reach more than 90%, and it is best to have water. The onset of the disease depends on the temperature sooner or later, and the severity of the disease depends on the humidity. Therefore, the rainy, low-temperature, low-lying terrain, barren land, continuous garlic land, partial application of basal fertilizer yellow leaf disease lack of fertilizer senescent garlic field, leaf blight is seriously harmed.

Garlic leaf blight: mainly occurs on leaves and stems.

Comprehensive control measures: remove diseased leaves in the field in time. Strengthen field management and adopt formula fertilization to enhance host disease resistance.

Drain water in time after rain, water properly, and control the humidity in the field. In the early stage of the disease, you can choose to spray with high-harvest garlic to increase production**, generally from early to mid-April, spray once every 10 days, 2 3 times in a row. In the prevention and control, the appropriate addition of micro-fertilizer has a more significant control effect.

Garlic leaf blight is a common garlic disease, which affects different levels and mainly harms garlic in the open field. In particular, if there is a lot of precipitation, it is more likely to occur, and in severe cases, it will lead to wilting and limited production.

Pattern of onset

Garlic leaf blight is caused by infiltration of the bacterial Ascomycetes subphylum Sculococorum. The key to the pathogen is to spend the winter with the mycelium or ascomycetes on the way to the loss of the diseased residue, and the next year will cause the ascospores to cause infiltration, and then it will be re-infected with the cyclone and light rain, landing on the garlic leaves, and after the garlic is planted in autumn, the spores on the diseased residue will be scattered on other garlic leaves with the cyclone, and small raindrops will be scattered on other garlic leaves, causing other garlic infections. These bacteria need to survive in high temperatures, so temperatures with a lot of precipitation are more likely to occur.

Generally, in low-lying terrain, the drainage is not smooth, mixed with onions, ginger and garlic vegetables, and the field with the main stem of the injury is more likely to occur.

Onset of the condition

Garlic leaf blight is the key to damage garlic leaves and garlic seedlings, and the leaf disease will gradually develop from the top of the old leaves below. After the onset of the disease, there will be water-like lesions, there are also milky white dents annular spots, with the severity of the disease, the lesions will become earthy yellow, in the middle and late stages of serious cases, it will promote all the leaves to develop lesions, and even wither In the case of relatively large environmental humidity, the lesions will become purple and black, and the surface layer will appear dark brown-like substance; Garlic infected with leaf blight regrets can not harm the production of garlic seedlings, garlic can not be effectively improved, and the yield is very serious.

Ways to prevent it

Select farmland with high terrain for planting, the water level of farmland with high terrain is low, and drainage is more convenient; Farmland with low terrain should do a good job of sewage ditches.

Do not regenerate, remove the diseased and disabled bodies on time, damage or bury them, and reduce the infection of germs; For the garlic in the seriously diseased field, it can be planted in rotation with winter wheat and rapeseed, and the garlic disease residue in the field can be immediately eliminated and the source of pathogens can be reduced.

Improve cultivation technology, effective fertilizer, reasonable dense planting, immediate drainage and ventilation, reduce temperature, improve the disease resistance of the main stem, and apply pesticides to dress seeds before planting.

Effective fertilization, more organic fertilizer nitrogen, phosphorus, potassium fertilizer combined application, planting soles fertilizer, to promote the growth of the main stem.

It is recommended to apply garlic seed dressing in all aspects, which has an effective control effect on garlic leaf blight, and can also promote the growth of garlic roots, so that garlic hair is early, hair is more, rhizomes are developed, leaves are firm, underground stems are thick, and the effective time is up to 7 months, which can significantly improve the yield and quality of garlic. It can not only prevent garlic leaf blight, but also prevent sclerotinia disease, root rot, white rot and other diseases, in addition to preventing moth, such as: garlic maggots, leeks, whiteflies, spotted flies and other insect pests, but also can promote garlic sprouts, grow roots and strong trees, improve heading ability, and lay the foundation for high yield and increased yield of garlic.

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Garlic leaf blight is. A type of disease that begins in the hometown and will appear sting-like after the onset of the disease. When topping up, it can be planted in rotation with crops such as rape and winter wheat.

After planting, it is necessary to remove the already diseased garlic in time to reduce the pathogen. The seeds are dried before the garlic is sown. It is also soaked with 500 times carbendazim solution.

The soil should be disinfected and sterilized. In the process of garlic growth, pay attention to strengthening fertilizer and water management.

The main symptom of this disease is that the leaves will wilt, which is actually a bacterial infection. The best way to prevent it is to spray this fungicide in advance to prevent the leaves from wilting and falling off.

Garlic leaf blight is caused by problems with the soil. Before planting, the soil should be exposed to the sun for a few days, then fertilized, and then planted, after planting, watering and weeding can be prevented.