Green onion gray mold what medicine to remove 30

What drugs are used to prevent and control the gray mold of green onions.

Screening and breeding disease-resistant varieties. Reasonable dense planting, rotation implementation. Clean all personnel in a timely manner to reduce the source of infection.

Burn the sick and disabled wine in time to prevent the spread of germs. How to prevent and control green onion gray mold? What medicine can be used to prevent green onions, gray fungal medicine?

Strengthen on-site management. Apply more organic fertilizers, less chemical fertilizers, especially less nitrogen fertilizers, and add an appropriate amount of phosphorus and potassium to enhance plant disease resistance. Cultivate diligently and ensure that the onion battle is well ventilated.

In the rainy season, the water should be discharged in time to prevent the occurrence of high humidity and low temperature conditions.

At the initial stage of the disease, 50% Suclin humidifying powder 2000 times liquid, 2000 wet powder that can be killed 1200 times liquid, 50% black gray net humidifying powder 800-1000 times liquid, 50% water humidification powder 800-1000 times liquid or 40% gray male humidifying powder 800-1000 times liquid Botrytis botrytis is easy to develop drug resistance, the dosage and number of injections should be minimized, and when the drug must be used, it should be used in turns or mixed in turns. At the beginning of the disease, 600 900 times of 3% multi-oxygen detergent, or 300 times of Sterling agent, or 1200 times of 40% gray mold core detergent, or 800 times of 50% gray mold wet powder, or 25% amine (gray leaves of gray mold green onion are dry and rolled, and there is a tendency to spread.

The most important thing for green onion gray mold is prevention and proper organization of field management. Timely organize the field planting environment, reduce the reproduction of pathogens, and select green onion varieties with strong disease for planting. The onions that have been sick should be treated with drugs in a timely manner.

Shui'an humidifying powder 50% 800 1000 times liquid, 50% Sukrin humidifying powder 2000 times liquid can also be used for green onion gray mycosis. Usually sprinkled once a week, sprinkled about three times in a row, green onions grow gray mold, green onion leaves tip white, to timely drug prevention**.

Thrips This is also a very tricky pest in the wild, after the occurrence of thrips and other pests, there will be a large area of dry, yellow, curly green onion leaves, if you don't pay attention, it is easy to think that the green onion has drought. The scallion where thrips appear must be controlled in time, otherwise the quality of the scallion will be severely degraded and the yield will be easily affected. 3% acetamide EC 2000 times, high-efficiency chlorofluorocarbon 1000 times, effective for Toma, can prevent spraying, usually about 3 times in a row, sprayed once a week.

In addition, it is necessary to do a good job in field management, regularly clean up field diseases, disinfect leaves, and apply fertilizer reasonably.

More organic fertilizer should be applied, less chemical fertilizer, especially nitrogen fertilizer, and an appropriate amount of phosphorus and potassium fertilizer should be applied to enhance plant disease resistance. Work diligently to ensure that the onion field is well ventilated and transmitted. Timely drainage in the rainy season to prevent high humidity and low temperature conditions.

Because the gray mold fungus is easy to develop resistance, the amount of medicine and the number of applications should be minimized, and when the drug must be used, it is necessary to pay attention to rotation or alternation and mixed application.

I think if the green onions we grow have gray mold, we must find the best medicine for this disease in the market and spray it on the green onions in time to better work.

You can go to the pharmacy for consultation, and then buy medicine and come back and spray it, so that the effect is very good.

In the process of planting green onions, the occurrence of green onion gray mold is often seen.

At present, three main manifestations of green onion leaf pathogenesis are identified: white spot type, dry type and wet rot type.

So what are the specific prevention and control methods? Let's come together today.

1. Prevention and control methods: 1. Select and cultivate disease-resistant varieties.

2. Reasonable dense planting and crop rotation.

Clean up the countryside in time to reduce the source of infection.

Timely burning of diseased and residual plants to prevent the spread of germs.

3. Strengthen field management.

Apply more organic fertilizer, less chemical fertilizer, especially nitrogen fertilizer, and increase phosphorus and potassium fertilizer to enhance plant disease resistance.

Work diligently to ensure that the onion field is well ventilated and transmitted.

Timely drainage in the rainy season to prevent high humidity and low temperature conditions.

4. Pharmaceutical prevention and control.

In the early stage of the disease, 50% Suclin wettable powder 2000 times liquid, 2000 times can kill 2000 wettable powder 1200 times liquid, 50% black ash net wettable powder 800-1000 times liquid, 50% Xiu'an wettable powder 800-1000 times liquid or 40% gray male wettable powder 800-1000 times liquid and other agents can be sprayed for prevention and control.

Spray every 7 10 sprays and spray 2 3 times.

Because the gray mold is easy to develop resistance, the amount of medicine and the number of applications should be minimized.

2. In the early stage of drug prevention and treatment, use 600 900 times of 3% multi-oxygen water agent, or 300 times of Sterling water solution, or 1200 times of 40% gray mold sclerotia net suspension agent, or 800 times of 50% gray mold wettable powder, or 2000 times of 25% prochloraz (100 grams) emulsifiable concentrate, 500 times of tartar or 30% chlorocarb wettable powder, or 1200 times of 40% Schjiale suspension, or 1500 times of 50% Pythium relican wettable powder, or 50% Iprodione wettable powder 1000 times liquid and other agents spray prevention and control, spray once every 7 days, and control 2 3 times in a row.

Agricultural methods should implement crop rotation in diseased land, and after harvesting, the sail body should be completely diseased and disabled.

Ridge planting and furrow cultivation can be promoted in rainy areas, and drainage in time in the rainy season to avoid water accumulation in the field.

The above is the relevant answer to the prevention and control of green onion gray mold, if you want to know more about the industry, you can follow: WeChat***: huobao3456tv to learn more, and you can also leave a message to reply to the industry information you want to know after paying attention.

Summary. Chive gray mold mainly occurs under the condition of high humidity and rain, generally in April in spring every year, and the disease is more serious in the rainy season in August and September in autumn, so growers must prevent and control it in time.

At the beginning of the disease, spray 1000 times of 50% azoxycyclic amine water-dispersible granules, or 1000 times of 50% iprodione wettable and clear tremor powder, or 800 times of 50% ethylene sclerotia sclerotinia dry suspension, or 800 times of 26% pyrimethylamine ethylmycocarb wettable powder, or 600 800 times of 50% furimidamine ethylmycocarb wettable powder, or 600 800 times of 50% furymethotrine wettable powder. This bacterium is prone to drug resistance and should be rotated.

Chive gray mold mainly occurs in the humidity, rainy and watery conditions of seepage sails, generally in April every spring, autumn in August and September rainy season is more serious, growers must timely prevent and control the mountain.

Under normal circumstances, the disease spreads downward from the tip of the leaf, and then the leaf curls and dries, and when the humidity is high, there will be a large number of gray mold on the leaf, from above, it can also be distinguished from green onion purple spot and downy mildew. Choose varieties that are resistant to disease. Generally speaking, the green onion varieties with purple stems, thin leaf tubes, and thick wax powder have strong disease resistance, while the false stems are loose, the leaf tubes are thick, the mesophyll is thin, and the disease resistance is poor.

Choose disease-free plots to keep seeds, pay attention to the disinfection of seeds, and close the seedlings.

The original variety of green onion was first introduced, which can be traced back to the Warring States period. Zhangqiu, Shandong, which is famous for the cultivation of green onions in the country, began to grow green onions as early as 681 BC. The most common diseases of cultivated green onions are downy mildew, purple spot and rust.

How can we prevent and control these green onion diseases? The cultivation mode of green onions is diversified, it can be used all year round, and the cultivation of green onions is easy to cultivate with high yield, and it can grow well under general climate and soil conditions. It's just that in the cultivation process, some common diseases also occur from time to time, so that the growth of green onions is inhibited.

Purple spot disease: It can occur at the seedling stage, the growth stage, and the seed collection stage. Generally, roe deer meristem infects adult leaves, leaf sheaths and flower sprouts, and small white spots appear, and finally develops into light brown to dark brown lesions, accompanied by concentric wheel-shaped black mold layer, which is infected during the vigorous growth period and flowering stage, which has a great impact on plant yield.

The main focus of the disease on the green onion is prevention, and if you manage it well, there will be few occurrences of various pests and diseases. Green onions are suitable for growing in well-drained fertile soil, especially in soil with good air permeability, which is more suitable for the growth of green onions.

Caused by bacteria, high temperature and humidity, mechanical injuries, and insect mouth injuries are easy to cause disease epidemics. The symptoms of the disease are that the aboveground part of the green onion is lodging, easy to pull up, the lower part of the stem is rotten, and there is a foul smell. Prevention and control:

Keep the field drained smoothly and do not accumulate water after rain; In the process of field management of green onions, pay attention to the growth of green onions, and take measures to detect and treat them in time. Therefore, it is necessary to spray tributazole as soon as possible, with a 1:1500-fold dilution, or with benziconazole, also with 1:

1500 times dilution spraying.

(1) Selection and cultivation of disease-resistant varieties. (2) Remove the diseased residue in time after harvest to prevent the spread of germs. (3) Strengthen the management of green onion field and adopt formula fertilization technology to enhance the disease resistance of the host.

Reasonable dense planting, so that the onion field ventilation and light transmission, to prevent high humidity and low temperature conditions. (4) Clean the field, clean up the field as a vegetable crop before the implementation of crop rotation, and burn or bury the residual branches and leaves on the ground to reduce the source of infection. Crop rotation can reduce the occurrence of diseases.

Once the disease occurs, the diseased leaves should be removed in time, taken out of the field to burn or buried deeply.

Try to choose excellent varieties, dispose of the infected ones as soon as possible, maintain a good environment, apply fertilizer reasonably, and burn the stumps and leaves of previous crops.

The management of green onions should be strengthened, and proper fertilization should be carried out, so as not to make the land too wet, and some drugs can be used, seedlings can be thinned on green onions, and some disease-resistant varieties can be selected.

When planting green onions, we must choose disease-resistant green onions, and strengthen the management of green onions in the process of planting, so that we can prevent and control green onion gray mold.

First of all, we must choose high-quality varieties, and we must apply more fertilizer, pay attention to light, clean up some residual branches and rotten leaves in time, and spray it with some chemicals that make it good.

Spray pesticides in time to prevent and control, and pay attention to a simple treatment of weeds in the field, so as to ensure that some pests and diseases can be avoided.

Reasonable dense planting, at the same time to clean the countryside of the virus, reduce the spread of pathogens, and to choose a good agent for spraying, in advance for prevention.

Onion gray mold prevention and control methods Xiangdai: In terms of cultivation management, it is necessary to pay attention to the removal of disease residues and timely harvesting. At the early stage of the disease, 50% carbendazim, 50% thiophanate-methyl wettable powder can be sprayed with 500 times of liquid, 75% chlorothalonil wettable powder 600 times liquid, or 50 sulfalin, 50 promethin, 50 nonglilin wettable sugar 1000 1500 times liquid, 2 4 times in a row.

Because pathogenic bacteria are very susceptible to drug resistance, drugs should be rotated.

Green onion gray mold is a disease caused by gray mold, which generally multiplies and grows under humid and low temperature conditions. Therefore, under the environmental conditions of winter cultivation, the incidence of green onion gray mold will increase. However, green onions do not die on their own, but are affected by diseases, which may lead to a decrease in yield or quality.

In order to reduce the occurrence of green onion gray mold, field management can be strengthened, ventilation, dry and clean environment can be maintained, and diseased plants and weeds can be removed in time.

Hello dear, green onion gray mold is a disease caused by fungi, mainly infecting the leaves and bulbs of green onions, and the quality of green onions decreases. According to studies, green onion gray mold generally thrives in an environment with a temperature of 18 to 25 and a relative humidity of 70 to 90 percent, but it can also exist at lower temperatures. In winter, due to the low temperature and low air humidity, the incidence of green onion gray mold will be reduced, and the severely infected strains may also die, but the disease cannot be completely eliminated.

Therefore, disease prevention and control measures are still needed in winter, including removing diseased residues, disinfecting soil, and strengthening ventilation, to ensure the healthy growth of green onions.

How to control onion ash.

1. Symptoms: Onion gray mold is mainly harmful to leaves and bulbs, at the beginning of the disease, white spots on the leaves, oval or nearly round, white to light gray-brown in the early stage, mostly developed downward from the leaf tip, gradually connected into a piece, and the spots gradually expanded, fused into oval large spots, so that the onion leaves curled and died. When the humidity is high, a large number of gray mold grows on the dead leaves.

Light brown lesions occur in leaf sheaths and bulb necks when infected, internal tissues decay, and damp gray mold. During storage, dry and slightly sunken lesions appeared on the top and shoulders of the bulb, which became soft and light brown, and there was gray-white mold between the scales. In the later stage, small black-brown sclerotia are produced.

2. Cause: The pathogen overwinters in the field or storage warehouse with mycelium and sclerotia with diseased residues or bulbs. Airborne, invaded through wounds, likes low temperature and high humidity, and is prone to illness in case of long-term rain. When it rains during harvesting, it is not dried in drying, or when it is stored in high humidity, and it is easy to get sick.

3. Prevention and control methods: (1) Choose disease-resistant varieties. (2) Clean the countryside and implement 2 to 3 years of crop rotation.

3) Harvest in a timely manner, store after full drying, and eliminate diseased and injured bulbs. (4) Pharmaceutical prevention and control: 1000 times of 40% pyrimethamine emulsifiable concentrate in the early stage of the disease; or 1200 times of 50% Pythium wettable powder; Or 3% polyoxygen water agent 600 900 times liquid, or 40% gray mold sclerotia net suspension agent 1200 times liquid, or 50% gray mold mold wettable powder 800 times liquid, or 25% 100 grams of emulsifiable concentrate 2000 times liquid, or 30% chlorpicarb wettable powder 500 times liquid, or 40% scarpark suspension 1200 times liquid, or 50 iprodione wettable powder 1000 times liquid and other agent spray control, spray once every 7 days, continuous prevention and control 2 3 times.