The best treatment for cucumber wilt

bacterial wilt, bacterial blight.

Bacterial diseases. It is recommended to irrigate the roots with copper preparations such as copper ammonia, and at the same time spray bacterial pesticides such as mesomycin or streptomycin or zinc thiazole or spring leimycin and other foliar fertilizers.

This disease is mainly controlled by root irrigation, supplemented by foliar spray control, and the ability of crops to transmit water and fertilizer is poor after the disease, and the leaves are sprayed with mixed foliar fertilizer to supplement energy.

It is best to prevent it early, and it is best to use copper preparations such as copper ammonia on the day of planting to prevent it.

Cucumber bacterial wilt, also known as bacterial wilt, is a disease caused by bacterial infection, which is very harmful to production, and the whole greenhouse plant dies when the disease is severe.

Cucumber bacterial wilt is treated by spraying and root irrigation at the initial stage of the disease.

Root irrigation: It is recommended to use 500-1000 times of 1 shenazinmycin, 200-300 times of 1·2 octyramide acetate, 400 times of pyrimidine nucleoside antibiotics, 56 600-800 times of methylthio, 6 200-300 times of chunleimycin, 300 times of 14% copper ammonia aqueous solution, 400 500 times of 77% copper hydroxide wettable powder, 400 times of 50% copper wettable powder of succinate fertilizer, etc 400 grams, 1 time every 7 10 days, 3 4 times in a row.

Spray: It is recommended to use 50-67 ml of 25% amino-allicin microemulsion, 100-120 grams of spray per mu of 25% pyrimethylamine wettable powder, 75-94 ml of spray per mu of 32% azolone allicin emulsifiable concentrate, 8% benzyl allicin wettable powder (low toxicity), use 1500-2000 times liquid spray, alternately, spray once every 10 days, and apply 2-3 times in a row.

Hello, happy to answer for you; Obviously, this is cucumber downy mildew. It can be sprayed with 10 grams of 70% enoyl azoxystrobin, 50 grams of 60% flumorpholine mancozeb, 100 grams of Cyanamide 10 ml, 25 ml of fluopyroxamine downy mildewcarb, 3 grams of 50% fluoroetheramide and other agents for prevention and control, once every 7 10 days, 2 3 times in a row, you can control the onset of the disease and restore the normal growth of the diseased plants. Add brassinolide for better control effect.

1. Causes of the disease. It is an earthy, bacterial disease. It is mainly spread by irrigation water, and the disease can occur in a wide range of temperatures, from 10 degrees Celsius to 40 degrees Celsius, which is generally due to poor root development, resulting in the invasion of bacterial wilt pathogens; Unreasonable application of fertilizer, especially the application of base fertilizer, should be increased as much as possible in the old shed, and no or less farm fertilizer should be applied to prevent the invasion of pathogenic bacteria.

Soil acidification is also an important condition for bacterial wilt. The bacterial wilt pathogen prefers an acidic environment, and the disease is more serious in the old shed because of the severe acidification of the soil caused by the application of acid fertilizer in the old shed.

2. Manifest symptoms. The onset is rapid, and in general, the top leaves are wilted first, then the bottom old leaves, and finally the middle leaves. It wilts badly at noon, and can recover in the morning and evening.

After a few days, the plant dies and the leaves are green and dry and do not fall off easily. Some can find a large number of adventitious roots at the bottom of the plant, and the vascular bundles of the diseased stems turn brown. The disease begins after the root melon sits, and the result is most severe in the peak period.

3. Prevention and control methods. It mainly starts from two aspects: cultivation management and pesticide control. Only by giving priority to prevention and comprehensive prevention and control can we reduce the harm.

1.In terms of cultivation management, first of all, it is necessary to make it clear that this pathogen likes an acidic environment, so when preparing the land, it can be suitable for applying quicklime according to the pH of the shed soil, and generally apply 150 to 200 kg of quicklime per mu, which can not only adjust the pH of the soil, but also help to play the role of fertilizer in the soil. It is also necessary to pay attention to watering and fertilization, with the gradual decrease of the outside temperature, it is necessary to prevent the reduction of ground temperature when watering and fertilizing, otherwise it is easy to chill the roots, reduce resistance, and lead to the invasion of pathogenic bacteria.

With the decrease of ground temperature, humic acid and microbial fertilizers should be selected when applying fertilizers to increase ground temperature and promote root nourishment. The cultivation method should also be improved, and the high ridge mulch cover cultivation should be selected to create a suitable growth environment for the root system. 2.

If the disease is already infected, the method of root irrigation with fungicide and rooting agent can be used.

Optional agents: chlorobromoisocyanuric acid, Shigao, killable, copper ammonia aqueous agent, DT, etc

Cucumber bacterial wilt is a fungal disease in which the fungus overwinters on the seeds or the remains of diseased plants, and the cucumber striped leaf beetle and cucumber twelve-star leaf beetle carry the pathogen and infect the cucumber when foraging. In the case of low temperature and high humidity, the disease begins to develop when the cucumber is jointed, and the symptoms are first manifested on the upper leaves of the plant. The lesions begin to develop along the leaf veins at the tip and edge of the leaf, with small white spots at the beginning of the disease, and then irregular lesions, gray-white in the center of the lesions, and purple-brown halos on the outer edges.

Before sowing, the seeds were sterilized for 72 hours at a constant temperature of 70 °C. Or soak seeds in 50 warm water for 20 minutes. Then rinse and germinate the seeds.

Implement crop rotation and more than 2 years of rotation with non-melon vegetables. 45 Soak the seeds in water at constant temperature for 15 minutes, remove them, then move them into cold water to cool, and promote germination and sowing. Remove diseased leaves during the growing season and after harvest, and bury them deep in time.

Drain water in time in rainy days, watering should be less and more frequently, and prevent. <>

The disease progressed gradually, the shrinking stems and vines expanded upward, and the leaves gradually wilted upward, as if lacking water, and the whole plant died after 3 5 days. In the environment of low temperature and high humidity, diseases are prone to occur. Continuous cloudy days, rain and snow weather, resulting in a very low temperature in the shed, the light is filamentous, the leaves wilt at noon in the early stage, early Anhui can recover, severe death.

For prevention and control, before planting, use 100-150 times of R. solanacillum to irrigate the roots. At the beginning of the disease, the leaves were sprayed with streptomycin, neophytomycin, and leaf kunning and root irrigation. Even to avoid heavy planting, the plots with serious diseases should be cultivated for 3-5 years in a row with other crops that are not prone to bacterial wilt, and the best control effect is achieved if there are conditions to use the method of water and drought rotation.

The second is field management, high temperature and high humidity are generally the favorite environment of pathogens, do a good job in the drainage of tomato fields, especially in the rainy season to open ditches to drain water, low-lying land with high ridge planting, to keep tomato roots from being regularly soaked in groundwater. The soil is too dry, and when the soil is short of water, the tomato does not get nutrients and loses its resistance; 2. The environmental climate is too high, especially the direct sunlight makes it lack of moisture and causes bacteria to run rampant; 3. The temperature is too low.

It may be because of the influence of some pests and diseases, so cucumbers will have bacterial wilt, and the yield will also drop a lot.

The cause of cucumber bacterial wilt is that the environment of low temperature and high humidity is easy to occur. Continuous rainy days cause extremely low temperature in the shed, less light, poor ventilation, excessive humidity in the shed, and the greenhouse is very prone to disease. The second is extensive management, too deep planting, too large fertilizer and water, and the disease occurs heavily, and the whole plant dies after 3 5 days.

The third is continuous cropping, low-lying and damp, improper water management or continuous rain after sunshine, heavy rain after watering, soil moisture is high and low, seedlings aging, application of soil miscellaneous fertilizer that is not fully decomposed, vegetable root-knot nematodes are easy to induce the disease and can aggravate the occurrence of wilt.

1. Seed disinfection. The seeds are soaked in warm water at 55 degrees Celsius for 15 minutes, and 500 times of 50% bacterium or 25% benzelat wettable powder can also be used to soak the seeds for 1 hour.

2. Select disease-resistant varieties; Crop rotation. Implement crop rotation with non-melon crops for more than 5 years.

3. Cultivate strong seedlings. 100 grams of 50% carbendazim wettable powder were added to each cubic meter of nutrient soil for disinfection and sterilization to cultivate disease-free and strong seedlings.

4. High temperature stuffy shed. In the summer high temperature season, the soil is watered enough, and then the Zen wheel is covered with plastic film and sealed for more than 20 days, and the ground temperature of 20 cm reaches more than 45 degrees Celsius, which can basically kill the wilt bacteria.

5. Transplanting grafted seedlings. Grafting cucumber with black-limbed seed pumpkin as rootstock is the most effective method to control cucumber wilt.

6. Pharmaceutical prevention and control. Sprinkle 25% benzolat wettable powder or 50% carbendazim wettable powder per hectare in the planting ditch (hole). If it is found that there is a blight occurrence, irrigate the roots with 500 times of 50% carbendazim wettable grip powder, or 500 times of 50% methyl tobuzin, or 400 times of 10% double-effect Ling water solution, or 600-700 times of 70% dixone wettable powder, or 100-150 times of 2% pesticide anti-120 water solution, and irrigate once every 7 days or so, and irrigate 2-3 times in a row.