Cauliflower horn spot disease plagues many farmers, what are the symptoms of cauliflower spot diseas

Bacterial keratopathy. With the use of biomycin, spring thunder king copper, polyantimycin, thiamium copper, thiasen copper, quinoline copper, etc. for control effect is very good, every 7 10 days foliar spraying, continuous spraying 2 3 times, can control the disease, and make the diseased plants return to normal growth. 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.

Leave the seeds from the disease-free field without disease, soak the seeds in warm water at 45 degrees Celsius for 10 minutes before sowing, and then dry them for later use. (2) Crop rotation. For plots with more severe disease, crop rotation can be implemented for 2 to 3 years.

3) Strengthen field management. After harvesting, the land is turned deeply, sufficient basal fertilizer is applied, and phosphorus and potassium fertilizers are added.

Timely prevention and treatment is very important. At the beginning of the disease, 20 to 25 kg of water with thiazoxin and 20 thiobacterium copper suspension are used for foliar spraying, one to three times, with an interval of seven days, which can effectively ** the occurrence of leaf spot. Leaf spot disease is a common disease in the process of vegetable growth, especially in the early stage of adult use, will cause slight pesticide damage to the heart leaves of cabbage, make the leaf edge white, but has no effect on the growth of the plant, and will not develop after stopping the drug.

The drug can also be used as a seed treatment agent, and the concentration used can be up to 1000 times the liquid. But be careful when using it, <>

Cucumber bacterial horn spot is a kind of bacterial disease, the disease symptoms on the leaves are sometimes confused with downy mildew, the main difference is that when the bacterial horn spot is humid, the back of the leaf overflows milky white turbid bead-like pus, and there are white marks after drying, and the diseased part is easy to perforate. Cucumber bacterial horn spot is a kind of bacterial disease, the disease symptoms on the leaves are sometimes confused with downy mildew, the main difference is that when the bacterial horn spot is humid, the back of the leaf overflows milky white turbid bead-like pus, and there are white marks after drying, and the diseased part is easy to perforate.

The symptoms of cauliflower horn spot are that the cauliflower grows very small, with brown and yellow spots on the leaves, as well as large patches of withered yellow and rotten roots.

There will be a lot of small spots on the surface, and their roots grow very slowly, some of the roots are rotten, and there are many small insects on them, so it affects their growth, and it is not easy to treat.

Horne cauliflower spot is symptomatic of triangular patches on cauliflower leaves, resulting in reduced yields.

It can lead to spotting on the leaves of cauliflower, and it will also lead to a widespread reduction in cauliflower yield, and it will also cause the cauliflower to rot, and the leaves will also turn yellow.

It is necessary to take the method of crop rotation, spray some polysulfur suspension, or benmycetim, wettable powder, and spray continuously for 7 to 10 days in order to prevent horn spot disease.

In this case, we must spray pesticides in time, and we should also pay attention to the ratio of pesticides, and we should also pay attention to the management of water and fertilizer, and we should also pay attention to the appropriate temperature to ensure sufficient light.

Some pesticides should be used to improve, and this situation has also indicated that the field is caused by improper management, so in this case a simple treatment should be carried out for the weeds in the field.

In order to prevent cauliflower horn spot disease, the weeds in the field and around should be removed in time before sowing, and the soil should be turned deep to reduce the source of disease and insects. At the same time, disease-resistant varieties are selected, covered with medicinal soil after sowing, and sprayed with an insecticide before transplanting.

It may be caused by excessive fertilization or too much pesticide spraying, or it may be due to a lack of water or soil disease, and it may be due to too much sunlight that causes food pests and diseases, and there are a large number of small insects on the leaves of plants. Therefore, if there is this kind of round and frank disease in the orange line, you must go to ** in time.

It is likely that it is due to the lack of timely watering and fertilization, or because the light is not kept sufficient, or because the soil fertility is not enough, or it is possible that the dust is caused by the presence of pests and diseases.

This disease is caused by a fungus infection after too much watering causes the plant to become less resistant.

The black spots on the top of the cauliflower can be eaten if they are cut off. There are generally two reasons for black spots on cauliflowers, one is because the temperature and light are not suitable, resulting in the color of anthocyanins in cauliflower changing from white to yellow and other variegated colors, and even black. At room temperature, cauliflower can generally be stored for 3 to 5 days, but if it is stored at low temperature in film bags, it has been experimentally proven that it can be stored for up to two months, but the temperature and materials of the home storage environment are generally not as accurate as those in the laboratory.

Cauliflower is one of the vegetables often eaten at home in autumn, it is rich in nutrients, and eating cauliflower regularly can also protect the cardiovascular system. However, if the cauliflower was bought at home, if it was not properly preserved, the cauliflower would be black in a few days and could not be eaten Spray protection in time at the beginning of the disease, the agent is: 70% mancozeb wettable powder 400 500 times liquid; 75% chlorothalonil 500 600 times solution; 500 times of 40% dimicroquinone (1% sucrose can be added to improve the control effect);

Cauliflower black spot disease mainly affects leaves, petioles, peduncles and seed pods. The disease mostly occurs on the outer leaves, and the lesions rapidly expand into gray-brown round lesions with a diameter of 5 30 mm and no obvious wheel stripes when the temperature is high. When the disease is severe, there can be dozens of lesions on the leaves, densely covered with leaves, select new flowers and vegetables with no damage and black spots in appearance, and wrap the cauliflower with paper (a small amount of wine can be sprayed on the paper, alcohol can inhibit the ethylene release of the cauliflower and slow down the breathing rate) or plastic wrap, and put it upright in the refrigerator for preservation.

Broccoli black spot, also known as black mold, mainly damages leaves, stems, and petioles. The leaf disease usually starts from the outer leaves, which are water-stained dots at first, and then develop into brown to black dots, and the lesions rapidly expand into gray-brown round lesions when the temperature is high. Under humid conditions, black spot disease mainly affects broccoli leaves, petioles, peduncles and horns.

Both seedlings and adults can be damaged. The leaves are damaged, showing nearly circular green spots at first, and after enlargement, they are dark brown in the middle, pale green on the edges, with or without obvious wheel lines. When wet, the surface is densely covered with black mold.

Symptoms are the appearance of round greenish patches and, when wet, black mold on the surface.

There will be a lot of spots on the leaves, and the cauliflower is also very sluggish, and it is also very prone to rotting, and often dies in a large area.

First of all, there are a lot of lesions on the cauliflower, and there will be spreading, and the surrounding ring patterns are not particularly obvious, and it will cause the leaves to turn yellow and wither.

Prevention and control agent: 40 to 50 grams of 20% leaf dry azole (spring thunder king copper, Zhongshengmycin) mixed with 30 catties of water to the head of the mango tree, according to the size of the tree to increase or decrease the agent, small to 40 grams, large to 50 grams. Liangguoan spray is used at the leaf stage, flowering stage and fruit growth period respectively to supplement nutrition, increase the thickness of the waxy layer of leaves and fruits, increase the chlorophyll content, improve the self-trophic ability of mango, and can prevent sunburn and other diseases.

<> is mainly caused by bacterial and fungal calcium and magnesium deficiency, which can be prevented by supplementing calcium and magnesium fertilizer in advance and applying more lichen spore agents. Once produced, it is sprayed mancozeb + amino acid calcium magnesium foliar hypertrophy in the early stage of bacterial horn spot disease of Chinese cabbage, oily spots are produced on the leaves, light brown to brown, gradually to black-brown, the lesions are polygonal, and the leaves are partially rotten and odorous in the later stage. According to the investigation, the bacterial horn spot disease of Chinese cabbage began to occur 12 days after the emergence of Chinese cabbage seedlings (seedling stage).

Angular spot is also known as bacterial melanoma or ulcerative disease. It is mainly harmful to shoots, leaves and fruits. The small black spots of the size of the needle on the infected leaves of the new shoots that have not turned green, and then expand into small black spots that are raised, there are yellow halos around, and the lesions are polygonal, and the later lesions are fused into irregular large black spots The chemical agents used in the current routine prevention and control can only play a role in killing the bacteria on the surface of the tree, and the disease may be controlled in a few days after the use of medicine, but after the storm or typhoon, it will be reversed.

Bacterial horn spot not only harms the leaves, but also seriously affects the fruit, it is necessary to use Liangguoan 100-150 times + garlic oil 1000 times + chemicals together, spray, once every 3-5 days, and add chemicals at intervals. The effect is good, and recently it is also the last period of prevention and control of bacterial keratosis to restore the land, the long-term use of chemical fertilizers, pesticides, the structural acid-base balance of the land has been destroyed, the trace elements in the nutrients can not be absorbed by plants, and the beneficial bacteria are reduced. Biological bacteria can release trace elements in the soil, which have nitrogen fixation and carbon fixation and provide more and better nutrients for fruit trees.

The broccoli pathogen mainly overwinters on diseased leaves in the seed seat or hyphae, and the conditions are suitable in the following year, producing conidia, which are spread by air currents. The southern part of the country is prone to the occurrence of warm winter and spring, fog and heavy dew.

**Method; 1) Implement crop rotation and strengthen field management.

2) At the beginning of the disease, spray 500 times of 40% polysulfur suspension or 1000 1500 times of 50% benomyl wettable powder, 500 times of 70% thiophanate-methyl wettable powder, and 1000 times of 50% domocarb (carbendazim plus vanmycolin) wettable powder, once every 7 10 days, and 2 3 times of continuous control.

The pathogen mainly overwinters on diseased leaves in seed seats or hyphae blocks, and the following year when conditions are suitable, conidia are produced, which spread by airflow. The southern part of the country is prone to the occurrence of warm winter and spring, fog and heavy dew. At the beginning of the disease, spray 800 times of 50% thiophanate-methyl sulfur suspension or 1000 times of 50% benomyl wettable powder, 500 times of 50% lysobacteryl wettable powder, and 1000 times of 50% mycocarb (carbendazim plus vanmycolin) wettable powder, once every 7-10 days, and 2-3 times of continuous prevention and control.

It may be because you don't do some regular spraying to suppress pests, or you don't get enough sunlight, you can use some special pest removal agents to spray to drive away pests.

There will be blackening of the leaves, and there will also be some rot, and it will also lead to a decrease in the yield of cauliflower, some insect infestation, and it will also cause black-brown spots on the surface of the cauliflower.

There will be a lot of brown lesions on the patches, and the number is very large, and the speed of spreading is also very fast, and it will also cause his growth rate to be very slow, and there will be a situation of decay.

This black spot disease will cause some black spots on the surface of the cauliflower, and the leaves will also be adhered to it, which will cause a kind of rot situation, which looks like it will affect the quality of the cauliflower.

The disease causes black mildew spots on the surface of the cauliflower, which then spreads to the whole cauliflower and eventually causes the cauliflower to die.

1. Causes of onset of Zen dressing:

1) The pathogen overwinters on the diseased residue or in the soil with the diseased residue. Seeds can also carry bacteria. In the field, the fungus is mainly transmitted by wind and rain, and invades from wounds or directly through the epidermis, and then infects frequently.

2) 26 30, relative humidity of more than 90% is suitable for Liang Shen disease. Rainy, foggy, and dewy, diseases are prone to occur.

2. Key points of prevention and control:

1) Use non-amurous seeds. Generally, seeds should be soaked in 45 warm water for 10 minutes, or mixed with 50% of the seed weight of formazim, or 50% carbendazim.

2) 2 3 years rotation with non-leguminous vegetables in severely ill areas.

3) The used frame material of the bean should be used again after 1 or 2 years. Strengthen fertilizer and water management, and drain water after rain. Remove sick and disabled bodies in a timely manner.

4) In the early stage of the disease, timely prevention and treatment with pesticides can be used 75% chlorothalonil 600 times, or 50% gramadan 500 times, or 70% mancozeb 500 times, or 65% Duoguoding 1000 times, or 78% Kebo 600 times, or % Yibao 1500 times, or 1 1 240 Bordeaux solution, or 75% fierce kill 500 600 times.

It is considered to be cauliflower black spot disease.

Prevention and control methods. 1. Crop rotation is carried out every other year with non-cruciferous vegetables to avoid continuous planting, and the residues of diseased plants in the field are removed in time after harvest to reduce the source of bacteria.

2. Strengthen field management, reasonable fertilization, pay attention to the combined application of nitrogen, phosphorus and potassium, and appropriately increase phosphorus and potassium fertilizers to improve plant disease resistance. Leafy vegetables should be harvested early in time to reduce the damage.

3. Seed treatment can be used for seed dressing, and other parts of vitiligo can be seen.

4. Spraying protection timely spraying protection in the early stage of the disease, the agents are: 70% mancozeb wettable powder 400 500 times liquid; 75% chlorothalonil 500 600 times solution; 500 times of 40% dimicroquinone (1% sucrose can be added to improve the control effect); 50% promethine 1500 times liquid. 5. Adapt measures to local conditions and plant varieties with strong disease resistance, such as Shuangqing 156, Qingqing and other varieties.

FYI!