How to prevent millet smut?

The prevention and control of millet smut is as follows: 40% double wettable powder for seed dressing, according to the weight of the seeds. 6% ricketta suspension seed coating agent, according to the amount of seeds.

Enazole ultra-fine wettable powder, seed dressing according to the amount of seeds. In the area where white disease and smut are mixed, 35% methamanine wettable powder and 40% double wettable powder (1:2) can be mixed evenly and then mixed according to the amount of seeds.

Establish disease-free farmland and use disease-free seeds; Implement a 3-4 year crop rotation. If diseased plants are found in the field at the adult stage, they should be uprooted in time and taken out of the field to be burned.

Millet smut is generally asymptomatic before heading, soon after heading, there will be a bacterial gall on the spike that is swollen and oval, slightly larger than the healthy grain, and the outer layer of yellow-white film, containing a large amount of black powder, the film is relatively solid, not easy to break, usually the whole spike ovary is diseased, today I will introduce the prevention and control method of millet smut.

Prevention and control methods of millet smut:

1. Select and keep disease-free seeds for single harvesting.

2. Use 15% powder rust rather wettable powder, or 50% carbendazim wettable powder, etc., and treat the seeds according to the weight of the seeds.

3. Plant disease-resistant varieties.

Smut mainly affects the ears of grain, and all or part of the grains of the ears turn into black powder after infection, thus causing a reduction in field yield. The best way to prevent millet smut is to select disease-resistant varieties for sowing, strengthen field management, and use powder rust wettable powder or carbendazim wettable powder for prevention and control at the time of disease.

In this case, it is necessary to use a special agent in this area to achieve a good effect, and in addition, some words sulfur mixture can also have a certain effect.

Millet smut: Symptoms of damage: It should be manifested in the panicle, which is gray-green at the beginning and turns gray in the later stage, and the panicle is erect and does not droop.

The diseased particles are large, oval, filled with black-brown powder inside, and covered with gray membrane, which is not easy to break. The heading of the diseased plant is slightly late, and the plant height is slightly lower. Smut is mainly spread by seeds, and the fungus overwinters on the seeds with thick spores.

After sowing millet, the seedlings germinate and invade the seedlings at the same time as the seeds, and spread to the whole plant with the growth of the plant

Rice millet black mold is mainly caused by a lot of rain and poor ventilation. It can be carried out with antimicrobial pesticides such as jinggangmycin**. For details, you can consult the local agricultural machinery department.

The prevention and control of millet smut can go to the pesticide store to buy medicine to spray, which is still very effective.

When he grows to about 10 centimeters, spraying some medicine can be effectively treated.

Smut should be found relatively since this kind of medicine should be like a stalk should be this disease, and it is good to take medicine in the team.

In this case, you must ask for hello when you buy millet seeds, and sometimes it is a problem with the seeds.

How to prevent bone smut?

If you want to prevent and control bone black disease, you must find an agricultural expert to consult, because this is a disease of millet, normal ordinary people do not know, go to the seed company or pesticide company to ask the sales personnel, they will also know what medicine can be used.

Reasonable crop rotation and crop rotation for more than 3 years is an effective way to alleviate corn smut. Especially in places where corn smut is severe, it is necessary to plant more potatoes, beans and other crops, and try to avoid heavy planting for many years. If you really can't do it, you should also rotate and plant disease-resistant varieties.

Sowing at the right time, selecting seeds before sowing, drying seeds, and sowning shallow with sufficient moisture to speed up germination and emergence.

The reason for this disease is that the corn is also more seriously watered in this area, which will lead to excessive water absorption by the corn.

1. Pharmaceutical treatment: 50% Hesui An wettable powder, 25% powder rust rather wettable powder, 40% double wettable powder for seed dressing, and good results can be obtained for seed dressing. After the above-mentioned treatment, the seeds and coating agent are mixed and then dressed, which can improve the control effect.

Some pesticides should not exceed the specified amount when dressing seeds, so as to avoid pesticide damage.

2. Physiological sterilization treatment: with kilograms of quicklime and slaked lime, add 50 kg of water, 30-50 kg of wheat seeds can be soaked, and the water temperature is soaked for 3-4 days at 20 o'clock, 2-3 days at 25 o'clock, and only 1 day at 35 o'clock. After soaking, dry and sow seeds.

This method is easy to operate, easy to obtain materials, and has high efficacy, which is obviously better than soaking seeds in warm soup. In the process of soaking, it is not easy to have too many wheat seeds, and the thickness of the seeds is 2 feet to prevent the bottom seeds from heating and mildew.

3. Propagation of disease-free seeds: Propagation of disease-free seeds in seed farms or seed breeding bases. The planting field is at least 100 meters away from the field, and the seeds used must be strictly treated by the sock stove to ensure that all are disease-free.

Doing a good job in the propagation of disease-free seeds is the fundamental measure to prevent and control this disease, which can eliminate the heavy work of seed treatment.

4. Breeding of disease-resistant varieties: the physiological mutation rate of wheat smut is relatively slow, and the resistance of wheat to smut is a single gene dominant inheritance, and the antigen is also abundant, which is conducive to the breeding of antigen varieties. In the breeding of disease-resistant varieties, the characteristics of pathogens that cannot enter the embryo, or enter the embryo but have differences in meristem development, as well as the characteristics of closed pollination and disease avoidance can be used to carry out the breeding work.

For continuous cropping wheat field, 70% thiophanate-methyl wettable powder or 50% carbendazim wettable powder kilogram per mu, mix 45-50 kg of fine soil, evenly sprinkle on the ground, and then plough into the soil.

Wheat smut is a disease caused by fungi and is more common. Infection is spread by seeds, fertilizers, soil, etc. It is an important disease on wheat.

Strengthening seed quarantine and disinfection is key. Disease-resistant varieties were selected, disease-free seed fields were established, and seeds were dressed.

Wheat smut is a disease mainly transmitted by seed carriers, so seed disinfection treatment can basically achieve the purpose of prevention. The main treatment methods are as follows:

1. Establish disease-free seed fields.

2. Before and after heading, the ears are pulled out of the field and burned out of the field to reduce the spread of germs.

3. Wheat smut, in addition to seed carriers, there are also soil and manure carriers. Generally, 50% carbendazim wettable powder can be used, or rick rust according to the weight of the seeds.

4. Soaking seeds: 20% carbendazim per 50 kg of wheat seeds.

Summary. 2.The prevention and control effect can reach about 90%. Corn paste can also be used as a binder to increase the efficacy.

Hello, dear, use powder rust to prevent and control.

1.Use 25% powder rust wetting agent according to the weight of the seeds. That is, for every 100 catties of seeds, use medicated catties, add 6 catties of water, and wet mix stuffy seeds for 4 hours.

Is it okay in the later stage, **.

2.The prevention and control effect can reach about 90%. Corn paste can also be used as a binder to increase the efficacy.

The later ** effect is not good.

There is no drug to go **, only prevention and treatment.

Corn silk smut is an important disease in spring maize producing areas in China. It is common in the mountainous areas of Northeast China, North China and Central China, South China, Southwest China, and Northwest China.

1) Symptoms manifest only on the female and male spikes. In the early stage of injury, there were specific symptoms such as dwarf clump type, yellow streak type, and parietal lobe twisted type, and yellow streak symptoms appeared in the heading stage. The female spike of the diseased plant becomes smaller, does not spit out filaments, and the whole female spike becomes a large black pink bract except for the bract.

In the later stage, some bracts burst and release black powder, which is the winter spores of the fungus. (2) Infection route and pathogenesis The pathogen overwinters with winter spores scattered in the soil, mixed with manure or adhered to the seed surface, and is mainly transmitted by soil. Before the 3-leaf stage of maize, the soil temperature was 21 28 and the humidity was most conducive to the invasion of pathogens when the drought was moderate.

4 After the 5 leaf stage, there is no more infestation. When the seeds germinate, the fungus also germinates, infects the seedlings, and as the plant grows, it finally destroys the panicle and becomes black powder. Continuous cropping, extensive tillage, too thick soil cover, and dry soil are all conducive to infection and disease.

3) control methods: planting disease-resistant varieties; Timely removal of diseased ears or uprooting diseased plants; rotation with legume crops; Sowing seeds at the right time to promote early germination of seeds, rapid unearthing, and reduce the incidence of disease; 15% rust rather 1 kg of wettable powder 200 kg of seeds, or 50% dixone wettable powder 1 kg of 125 kg of seeds, or 50% Fumei double wettable powder 1 kg of seed dressing 500 kg, or 1 kg of enazole (Supoli) wettable powder 330 kg.

The main diseases of millet are millet white disease, millet rust, millet blast, millet leaf spot and millet brown streak.

The following are the prevention and control methods of common diseases of millet:

1. Millet leaf spot.

It is mainly harmful to leaves. The leaf spots are oval, 2-3 cm in size, grayish-brown in the middle, brown to reddish-brown at the margins. In the later stage, small black spots are born on the lesions, that is, the conidia of the pathogen.

At the beginning of the disease, spray 1000 times of Bicca foliar fertilizer + 500-600 times of 36% thiophanate-methyl suspension or 600-800 times of 50% carbendazim wettable powder, 800 times of 60% anti-mold treasure ultra-fine wettable powder, 400 times of 30% alkaline copper sulfate suspension, spray once every 10 days or so, and continuously control 2-3 times.

2. Millet white disease.

After the seedlings are damaged, the leaf surface turns yellow, and there is gray-white mold on the back of the leaf, which is called gray back. The flag leaf stage is the tip of the infested plant.

Three or four leaves, the leaves turn yellow, and there is gray-white mold, called white tip. After that, the leaf tissue is necrotic, and only the leaf veins remain, which are hair-like, so it is called white disease. The panicle of the diseased plant is deformed, and the grain becomes needle-shaped, which is called a hedgehog head.

600-800 times of 50% carbendazim wettable powder was sprayed before heading and after flowering.

3. Millet rust.

In the filling stage after heading of millet, a large number of reddish-brown round or oval spots are scattered on both sides of the leaves, especially on the back, and yellow-brown powdery spores can be dispersed, like rust, which is a typical symptom of rust, and can make the leaves die when it is severe. When the rate of diseased leaves reaches 1%-5%, the first spraying can be carried out with 600 times of 15% powder rust wettable powder. A second spray should be applied after 7-10 days as appropriate.

4. Valley blast.

Leaf lesions are typically fusiformal, grayish-white or grayish-brown, and the leaf margins are dark brown. When wet, gray mold occurs on the back of the leaf, and when the spike stem is seriously damaged, it becomes a dead ear. At the beginning of the disease, 500-600 times of 65% mancozeb or 200-300 times of methyl tobuzin were sprayed on the foliar surface for control.

5. Millet brown streaked disease.

At the onset of the disease, foliar sprays with 72% agricultural streptomycin or 20% thioacetal copper suspension can be applied every 7 days, preferably 2-3 times in a row. In the more diseased plots, the old leaves should be peeled off, the ineffective stems and over-dense and poor-growing plants should be removed, and the temperature should be reduced.