What s the deal with bacterial keratosis in watermelon? How is it treated?

Watermelon bacterial keratosis is caused by Pseudomonas infection. The pathogen overwinters in the soil with the diseased residues, and can also overwinter on the seeds, becoming the main source of infection in the following year. Seed treatment, choose disease-free seeds, soak seeds in 55 warm water for 15 minutes before sowing, put them in cold water to cool after fishing, and then promote germination and sowing; You can also use 300 ml of neophytomycin to soak the seeds for 30 minutes, and then soak them in clean water for 4-5 hours, and then remove them and promote germination and sowing.

In life, do you know what is the bacterial keratosis of watermelon? How does it work? The disease often occurs on the leaves and stems, and later on the tendrils and fruits.

When it is sick, it will produce round or irregularly shaped yellow-brown lesions. The lesions on the leaves are in the shape of water stains at the beginning, and will slowly expand to form yellow-brown or polygonal lesions, and sometimes some white substances will appear on the back of the leaves, and in the later stage of growth, the lesions will slowly dry up, and they are particularly easy to crack. When this disease appears, it is necessary to prevent it in advance, use some disease-resistant varieties, and be sure to disinfect and sterilize the seeds.

Before sowing, the seeds must be soaked in a liquid of 150 times formaldehyde. You can also use 500 times the leaf flat to soak the seeds for an hour, and then soak the seeds in warm boiled water at 55 degrees for about 15 minutes. The planting land must also be treated with timely sterilization.

It is mainly caused by prolonged rainfall. Plant diseases should use plant-specific insecticides, evenly sprayed on plant leaves, do not water temporarily during the use of medicine, otherwise it will reduce the efficacy of the drug, you can consolidate it more.

Watermelon bacterial fruit spot disease is widely distributed all over the world. It spreads quickly, is difficult to control, and is destructive. It is a worldwide quarantine disease of watermelon crops.

In the early stages of the disease, water-soaked dark green spots appear at the lesion site. As the disease progresses, the area of the lesion expands into a near-circular water-immersed lesion, and the color of the lesion gradually deepens. In severe cases, the surface is cracked, and sometimes thick, brown, odorous bacterial pus overflows, while the inner medullary water is soaked in rot or cotton wool necrosis, and there is a rotting odor.

Watermelon has bacterial fruit spots, commonly known as pubic derma, generally can be sprayed with quinoline copper or copper sulfate, copper hydroxide, copper complex, leaf khan, streptomycin, allicin, cycline, chlorobromoisocyanuric acid and other drugs, spray 7-10 times every 1 day, spray 2-3 times. When taking the drug, the solution should be diluted twice and mixed alternately to avoid drug resistance.

Eating watermelon not only satisfies their appetite but also has great benefits for the human body. Watermelon contains a lot of water, which can replenish the water lost in our body. It also contains plenty of sugar to replenish stamina and energy**, and is rich in vitamins, minerals, and other nutrients that are beneficial to the human body.

Watermelon has the effect of quenching thirst, and watermelon contains a lot of water, which can be used to effectively relieve symptoms such as acute fever, thirst, sweating, and irritability. Watermelon is rich in sugar and salt, which is good for diuresis and eliminates inflammation of the kidneys. It can also provide nutrition for nephritis patients.

Watermelon contains a lot of water, eating watermelon is conducive to promoting stool and bowel movements, and watermelon also has the effect of reducing bile pigment content. In addition to fat and cholesterol, watermelon also contains glucose, fructose, sucrose, dietary fiber, calcium, phosphorus, glutamic acid, citrulline and other nutrients, especially vitamin A. If the sound is hard and crispy, such as knocking on a board, the sound of knock knock or get is an unripe watermelon; If the sound is tired and muddy, like the popping of a drum, and there is a vibrating sound, it is a ripe melon.

When choosing seeds, you must choose excellent varieties, and when planting watermelons, you must soak watermelon seeds for an hour, rinse them with water 4 or 5 times, and usually use some antibiotics to spray, so that you can have a certain control effect.

It can be sprayed with some fungicide No. 1. Soak the seeds of the watermelon and wash them several times, so that it will prevent some pests and diseases. There is also spraying some spring leimycin, lifelong mycin, copper hydroxide.

Be sure to make a blend according to the qualified ratio. In this way, it will prevent some pests and diseases.

Fungicide No. 1, with this agent for prevention and control, can play a very good effect, on this aspect of some conditions, has long been studied.

It may be related to too much rain, or it can be caused by too much watering. Spray chemicals in a timely manner, and ventilate properly, and don't let too much water accumulate.

This disease is generally caused by excessive humidity, which can be prevented by spraying fungicides in wet weather.

It is mainly affected by water, probably a lot of water on the leaves, and then there will be disease spots. Proper pruning of branches and leaves, proper ventilation and never too much water.

The main hazard is the leaf leaf pathogenic bacteria, mainly latent in the seeds, with the disease residue remaining in the land, become the second year of the pathogen spread, the fungus can have leaves to spread the melon pulp, natural invasion, the leaves through the rain pest farming operation spread, low temperature and high temperature easy to disease cucumber bacterial horn spot is caused by the bacterial infection of the genus Pseudomonas, the pathogen will overwinter in the soil in the seed or with the diseased residue, become the initial source of infection in the second year, will be infected during the seedling period, after transplanting and planting, With the continuation of low temperatures, humidity or humidity and rain in the field.

<> initial stage, cucumber stems and leaves should show water-soaked small spots, with the development of time and disease, water-soaked spots gradually decay, the color deepens and turns brown, and finally the lesion site is dried up, and there are white marks on the upper surface. In particular, cucumbers in winter and early spring cultivated in protected areas in northern China and cucumbers in the rainy season in East China were heavier. Moreover, cucumber bacterial horn spot is easily confused with cucumber downy mildew.

If you can't identify the condition and use the symptomatic medication, it will inevitably cause great losses.

The true leaves of cucumbers are infected with bacterial horn spot, and the water-stained shape on the damaged leaves gradually changes from light green to light brown, and when the lesions expand, they will become polygonal due to the restriction of leaf veins. In later stages, the lesions are grayish-white and can be easily perforated. Cucumber bacterial horn spot mainly affects leaves, but also causes damage to cucumbers and stems.

After the onset of cucumber seedlings, round or oval water-soaked depression lesions are produced on the cotyledons, with a slight yellow-brown color, and then brown and dry. After the true leaves of cucumbers are harmed.

The germ is bacteria, the fungus overwinters in the soil with the diseased residue in the seed, and becomes the source of infection at the beginning of the year, the seed carrier rate is 2% 3%, the germ spreads through wind, rain, insects, agricultural activities, invades tissue wounds or natural orifices to cause disease, and seeds are disinfected. Sterilize with 70 °C dry heat for 72 h. 50 Soak the seeds in warm water for 20 minutes, remove them and dry them before germination and sowing.

Streptomycin sulfate was soaked for 2 hours, rinsed and then germinated and sown.

This symptom may not be timely to the cucumber to replenish water or remove pests, etc., usually pay attention to buy some special pest sprays for spraying, more cucumber water supplement.

Cucumbers mainly damage leaves and melon strips, and stems, petioles, and tendrils are also diseased. Leaf infection: pinhead-sized water-soaked small spots, polygonal yellow-brown lesions, grayish-white, easy to perforate and rupture.

When the humidity is high, there is white pus on the lesion on the back of the leaf. 1.Choose disease-resistant varieties.

2.Crop rotation with non-melon crops for more than 2 years. 3.

Strengthen temperature and humidity management, pay attention to ventilation and humidity, and reduce humidity to below 70%. 4.Watering should be done using the technique of pouring dark water under the film, watering small water, reducing humidity, and reducing the duration of condensation in the shed to control diseases.

Some black-purple mold layer is produced on the leaves, and the leaves do not have no light transmission and so on. Therefore, we must pay attention to ventilation during the planting process, and the humidity should also be reduced to below 70%. It is best to use a spraying can when watering. You can also buy some pesticides.

Symptoms occur mainly on leaves, petioles, stems, tendrils, and fruits. Cotyledons are diseased with round or irregular yellow-brown lesions; The lesions on the leaves are water-stained at first, and then expand to form yellow-brown and polygonal lesions, and sometimes the diseased parts on the back of the leaves overflow with white bacterial pus, and the lesions are dry and easy to crack in the later stage; The lesions on the stems and fruits are water-stained, and a large amount of mucus overflows on the surface, and later the lesions of the fruit crack to form ulcers, which expand from the outside to the inside, and can extend to the seeds.

Pattern of onset. Diseases caused by bacteria. The pathogen overwinters on seeds or with diseased residues in the soil, spreading through wind and rain, insects and farming practices, and invading through the host's stomata, water holes and wounds. Warm and humid conditions are conducive to the onset of the disease.

Prevention and control methods. 1) Disease-free melon seed collection and seed treatment: before sowing, the seeds are soaked in 40% formaldehyde 150 times + Yunda -120 500 times solution for 2 hours, or soaked in 50% dysen ammonium 500 times liquid + Yunda -120 500 times liquid for 1 hour, or soaked in 55 warm water for 15 minutes, or 1 million units of streptomycin sulfate 500 times liquid + Yunda -120 500 times liquid soaked for 2 hours, washed with water and then germinated and sown.

2) During the growth period or after harvesting, remove the diseased leaves and plants and bury them deeply, and implement deep ploughing.

Moderate and early stage of onset.

Plan 1: 50ml of "Olik-Fine Cut" + 40ml of Jinbei, mixed with 15 kg of water, 1 time in 5-7 days, 2-3 times in a row;

Plan 2: 50ml of "Olik-Fine Section" + 30ml of R. solanacearum Rick, mixed with 15 kg of water, once every 5-7 days;

Plan 3: "Olik-Fine Section" 50ml + 30ml of quick net, mixed with 15 kg of water, 1 time in 5-7 days, 2-3 times in a row.

Moderate and late onset.

Finely cut 50ml + 25% chlorazole 20-25g, mixed with 15 kg of water, 1 time in 3-5 days. Note: When horn spot and downy mildew occur at the same time, 30ml of the medicated cream bell should be added at the same time.

Bacterial horn spot is caused by Pseudomonas syringae, the leaf is V-type brown spot, and the white spot such as bird feces spot is a significant feature in the morning, and the leaf spot is caused by the specialized bacterium of Pseudomonas syringae cucumber, and the lesions are like downy mildew in the early stage, which is difficult to distinguish. The two sickness potions can basically be used together.

You look up a brand called Sheng Zhifeng, it has a series of things, and several of the products seem to be anti-bacterial. I don't dare to say anything else, but the effect of increasing the sugar content is real, I have eaten the comparison product, and the grapes with this product are so sweet that they are greasy.

Bacterial horn spot disease of cucumber is common in cucumber in protected areas, and the rate of diseased leaves in severely diseased sheds can reach 70%, which is one of the main diseases in the production of cucumbers in protected areas.

Control methods: choose cucumber varieties that are more resistant to bacterial horn spot. Before sowing, soak seeds in 55 warm water for 25 minutes; or soak the seeds with 600 times of haloperic acid for 30 minutes to kill the germs carried in the seeds, wash them with water and promote germination; Pay attention to the disinfection of seedbed soil, sow seeds on sterile bed soil, scientific management, and cultivate disease-free and strong seedlings; Improve the light conditions so that the plants can grow robustly; Strengthen ventilation in the early morning and evening to reduce the humidity in the shed; On a sunny morning, after the dew dries, agricultural operations such as pruning and tying vines are carried out; Remove diseased leaves and plants in time and bury them deeply.

Seriously ill greenhouses and greenhouses are rotated with non-melon crops for more than 2 years. After the emergence of diseased plants in the field, 600 times of haloperic acid, or 2000 times of noromycin, or 2000 times of gentamicin solution, 300 times of 14% copper ammonia aqueous solution, 400 times of 77% killable wettable granule, 800 times of 20% phyllazole, 600 800 times of 47% Jiarui agricultural wettable powder, respectively, mixed with 600 times of 2116 liquid medicine, sprayed once every 5 7 days, sprayed 3 4 times continuously. Pesticides should be used in rotation, and during the melon strip period, it is necessary to pay attention to the safety interval of the pesticides used.

Cucumber infected with bacterial horn spot will have such symptoms, which should be prevented and treated in time.