Broccoli soft rot is a serious loss, what is the cause of broccoli soft rot?

Broccoli soft rot is a bacterial disease that prefers to stay in a warm and humid environment in the wild. If poor drainage in the field can easily lead to water accumulation after rain, or plant growth is too dense and easy to cause excessive humidity in the field, then a large number of soft rot pathogens remain in the field, and then spread in a large area through irrigation water, wind and rain, and eventually lead to the outbreak of soft rot. In addition to harmful broccoli, soft rot can also infect vegetables such as tomatoes, eggplants, cucumbers, and cabbage.

If farmers are not aware of this or do not know enough about it, and adopt continuous cropping or unreasonable crop rotation, that is, one crop of broccoli is planted and the next crop is planted with broccoli, or soft rot such as tomatoes and cabbage can infect harmful crops, then the number of pathogenic bacteria left in the soil will continue to increase, thus increasing the incidence in the field.

Diamondback moth and other pests are seriously harmed, and the pathogenic bacteria that cause a large number of broccoli soft rot will invade the plant body through the leaf stomata and root hair area of broccoli under suitable temperature and humidity conditions in the field, but the success rate of invasion is not very high. If moth pests such as diamondback moth and cabbage worm in the field are not properly controlled, they will eat unscrupulously and harm plant leaves, thus leaving a large number of insect populations, so that the pathogen of broccoli soft rot will be more likely to invade the plant body from these insect mouths with the help of wind and rain, thereby increasing the incidence. Broccoli soft rot often occurs in the broccoli nodulation stage, which mainly damages the bulb of broccoli and also damages the main stem and leaves.

When broccoli begins to develop, water-soaked spots appear on the outer leaves or at the base of the bulb, and the outer leaves of the plant wilt at noon and recover.

What are the ways to prevent broccoli soft rot? What are the hazards? How to prevent broccoli root rot?

After a few days, the outer layer does not recover, the diseased part begins to rot, the broccoli leaf bulb is exposed or the base of the plant gradually decays into mud, or it is depressed and ulcerated, the petiole or root tissue is grayish-brown, soft rot, and the whole plant of the seriously ill broccoli will rot, and the diseased part will emit an unpleasant odor. Causes of Broccoli Soft Rot The pathogenic bacteria of broccoli soft rot mainly overwinter in the field, cellar or soil among undecaying debris and pests. Pathogens can survive for 50-60 days in soil with a water content of 20-28% and are spread through rainwater, irrigation water, bacterial fertilizers, insects, etc.

Invasion from the wound of broccoli.

The common reason is mainly continuous cropping, which makes soft rot bacteria continue to multiply and accumulate in the soil; or years of excessive use of chemical fertilizers that have reduced the amount of soil organic matter and beneficial microorganisms; Long-term drought and rain, or excessive squatting seedlings, overwatering, and many underground pests; When the surface is covered with water and the soil is deprived of oxygen, the condition is severe. In order to control broccoli soft rot, farmers should pay attention to selecting excellent varieties with strong disease resistance, avoid continuous cropping with Solanaceae, melon and other cruciferous vegetables, carefully level the land, correct the irrigation and drainage system, adopt high bed direct seeding in non-arid areas, and implement furrow irrigation or sprinkler irrigation to prevent flooding.

It may be because there is too much watering, the temperature difference between morning and evening is too great, the temperature is not controlled to the proper degree, and the fertilization is not paid attention to.

Because of the usual watering too often, the water will corrode the root system of the broccoli, and the leaves will slowly rot, which will give off a foul smell.

It may be because of an insect infestation and too much watering, and the roots are soaked and rotten.

The broccoli planted produces soft rot, what pesticide is good to use?

With streptomycin sulfate or 72% agricultural streptomycin sulfate soluble powder 3000 4000 times or neophytomycin 4000 times, 27% copper noble suspension 700 times, once every 10 days, continuous prevention and control 2 3 times, stop the drug 3 days before harvest.

Growing broccoli requires attention:

The morphological characteristics and growth habits of broccoli are basically similar to those of ordinary white cauliflower (cabbage), which belongs to the Brassica napus species of the cruciferous family, and is a 1-2-year-old herbaceous plant. It grows vigorously and is resistant to heat and cold. The plant is tall, and about 20 flower stems are drawn out according to the leaves of different varieties, and the top is clustered with flower buds.

The close group is formed into a flower ball, the shape is hemispherical, and the flower buds are blue-green, so it is called broccoli.

Broccoli grows normally in good light, and not enough light can cause the plant to grow. After broccoli completes its vernalization stage, the flower buds begin to differentiate. When the flower buds have not yet opened, they should be harvested in time to avoid harvesting too late and causing bulbs or flowering.

When harvesting, cut off about 10 cm of the lower part of the flower bulb with the flower stem. After the top bulb is harvested, the axillary buds of the plant sprout and quickly grow side branches, which form side flower bulbs at the top of the side branches. When the side flower bulbs grow to a certain size and the flower buds have not yet opened, they can be harvested again, and they can be harvested 2-3 times in succession.

Broccoli is less demanding on the soil, but it is better to cultivate it in fertile loam soil. In addition to the need for nitrogen, phosphorus, potassium, magnesium, sulfur and other large elements, a certain amount of trace elements is also needed, and various elements should be paid attention to when fertilizing. Nitrogen fertilizer should not be too much, otherwise it will cause the plant to grow and vegetative growth too vigorously, and delay the appearance of flower bulbs, which is also easy to cause rot diseases.

Broccoli grows well in moist soil. Broccoli requires more water, especially during the formation period of flower bulbs, it is necessary to water in time to keep the soil moist.

Broccoli soft rot generally begins at the balling stage, at the beginning of the outer leaf or the base of the leaf bulb appears water-soaked spots, the outer layer of the plant wilts at noon, recovers in the morning and evening, the outer leaf does not recover after a few days, the diseased part begins to rot, the leaf ball is exposed or the base of the plant gradually decays into mud, or collapses and ulcerates, the tissue at the base of the petiole or rhizome is gray-brown soft rot, the whole plant rots severely, and the diseased part exudes a foul smell, which is different from black rot.

Before land preparation, the soil must be disinfected with quicklime or potassium permanganate, the dosage of quicklime is 50-100 kg for 667 square meters, and the dosage of potassium permanganate is kg.

Strengthen field management, pay attention to drainage after rain, cultivate and weed in a timely manner according to soil moisture and broccoli growth needs, reasonable top dressing, moderate watering, and timely spraying of strong stems at the budding stage, which can make plant stems thick and flower bulbs hypertrophied, and at the same time can improve disaster resistance, reduce the amount of pesticides and fertilizers, reduce residual toxicity, and improve the natural taste of broccoli.

1. Flower bulb disease: flower bulb appears irregular water-soaked small spots, with the expansion of the disease, the lesions gradually turn brown and expand, the disease part decays and emits a foul odor under humid conditions, the disease can be further extended to the flower peduncle, the flower peduncle appears brown soft rot symptoms, so that the whole plant collapses, and the diseased part exudes an unpleasant odor (different from black rot). When drying, the diseased part turns black, and finally the whole flower bulb rots and turns black.

2. Petiole and stem base infection: when the petiole is infected, it is water-soaked rot and falls off, threatening the stem base, making the stem base also appear water-soaked soft rot, when the pathogen is infected from the incision at the stem base, the diseased part is water-soaked at first, and then gradually rots inward, and the lesion is brown and rotten after further expansion, which eventually leads to the collapse of the entire stem base.

3. Leaf infection: it is common to see that some old leaves of some plants are yellow and wilted, and the base of the flower bulb or stem is browned and wet rot, and the middle and lower leaves are wilted like water loss at noon, and can be recovered in the early morning and evening, and the wilting is aggravated for several days and no longer recovered.

Identification of orchid stem rot and soft rot, as well as prevention and ** in summer.

Broccoli contains protein, dietary fiber, vitamin K, vitamins A, C, E, and carotene, thiamine, riboflavin, niacin, calcium, phosphorus, sodium, magnesium, iron, zinc, selenium, and potassium. There are three types of broccoli, early, medium, and late, and each has a different method of prevention. If you want to do a variety in spring and summer, you should choose those that are drought resistant, because it is relatively hot during this time.

Broccoli prefers to be planted on soils with plenty of sunshine, strong fertilizer and water retention, loose and fertile, good air permeability, pH value of 6, and good drainage.

<> so the cause of root rot often has a lot to do with the soil, low-lying, heavy soil stickiness, preventive measures: with 1200-1500 times of the green worm fungus prevention, if the field of white powder butterfly, it should be sprayed immediately, in the field of insect population density can be used 2000 times to kill pyrethroid, or 800 times of trichlorfon crystal spraying. Watering after transplanting broccoli is an important cause of root rot.

Before transplanting broccoli, the roots of the broccoli will be pruned and some bad roots or empty roots will be cut off, which will inevitably cause certain wounds to the roots of the broccoli. In some cases, the land is repeatedly planted with broccoli, and root rot and characteristic pests will overwinter in the soil, and when transplanted the next year, the pests and diseases will immediately become active as the main infecting agent.

Prevention during colonization. Whether it is sowing and planting or seedling planting, when planting broccoli, it is necessary to reclaim the ridges, apply farmhouse fertilizer as base fertilizer, especially to do a good job in soil disinfection and purification, and at the same time avoid continuous planting in the planted soil. Root rot control measures:

Choose plots that can be watered by drought and drained by waterlogging; Deep ploughing and drying of the soil, so that the soil is loose and breathable, and the occurrence of pests and diseases is reduced; Scientific and reasonable application of organic fertilizer base fertilizer to reduce the occurrence of fertilizer damage. Only ensure that the root system is well developed.

The main reasons are continuous cropping, excessive use of chemical fertilizers all year round, soil water and lack of oxygen, etc., which can be judged according to the specific situation. Wounds such as disease scars and mechanical injuries invade, and the disease will be caused by long-term drought and rain, excessive squatting, excessive watering, and many underground pests.

It is very likely that there are a lot of insects in the broccoli, which gnaw all the roots, and the perennial use of chemical fertilizers, the content of chemical fertilizers is too much, so it will also lead to such a condition.

The common causes are the excessive use of chemical fertilizers for many years, which reduces the number of soil organic matter and beneficial microorganisms. Long-term drought and rain, or excessive squatting seedlings, overwatering, and many underground pests cause disease; The disease is severe when there is water on the surface and there is a lack of oxygen in the soil.

1 continuous cropping, especially in the south where the climate is suitable. 2. Due to the excessive use of chemical fertilizers for many years, the number of soil organic matter and beneficial microorganisms has seriously declined. 3. Temperature, the lowest temperature of soft rot infection is 2C degrees, and the highest temperature is 40C degrees.

4. Summer cultivation occurs severely, and the peak period of disease is from late July to August.

Summary. Use fludioxonil, or copper metha, or copper ammonia, or oxamolin, or Bacillus subtilis, or chlorbromoisocyanuric acid, or sodium disulfonate, or pentachloronitrobenzene and other drenching roots for control, once every 7 10 days, 2 3 times in a row, can control the disease, and restore the normal growth of diseased plants.

The broccoli planted produces soft rot, what pesticide is good to use?

Hello, I'm Lulu and I'm happy to answer for you.

Hello, I'm Lulu and I'm happy to answer for you.

Use fludioxonil, or methyl copper, or chlormonia copperzinc, or oxachlor, or Bacillus withlico, or chlorbromoisocyanuric acid, or liquid fiber sodium disulfonate, or pentachloronitrobenzene and other drenching roots for control, once every 7 10 days, 2 3 times in a row, can control the disease, and make the diseased plants of the buried ant return to normal growth.

Broccoli soft rot can be sprayed 2-3 times a day with R. solanacearum plus garlic oil, plus a chemical agent, R. solanacearum plus garlic oil to irrigate the roots, irrigate once every 5-7 days, and irrigate the roots twice in a row. In order to prevent broccoli soft rot, it is necessary to avoid planting it with vegetables such as Solanaceae and melons; When farming, try to avoid damaging broccoli and make sure it is intact to prevent the invasion of germs; At the same time, after planting and harvesting, the work of vacating the land, turning the ground, and drying the field is carried out to promote the decomposition of the offspring limbs of the pathogen and reduce the occurrence of broccoli lesions.

Broccoli soft rot can be sprayed 2-3 times continuously with R. wiltacearum plus garlic oil, once a day, plus a chemical agent, R. wiltearum plus garlic oil to irrigate the roots, irrigate once every 5-7 days, and irrigate the roots twice in a row.

Causes of broccoli soft rot.

1. Broccoli loss and soft rot is caused by carrot pathogen variants, the climate is warm in the south, it is easy to spread the disease in the field, and the northern region is mainly because of improper storage, disease or insect pests lead to bacterial erosion, resulting in broccoli lesions.

2. The reduction of the amount of organic matter in the soil, the excessive use, and the decline in the number of beneficial microorganisms cause the soil to be compacted and acidified, so that the number of pathogens in the soil accumulates year by year, and diseases will occur when the temperature conditions are suitable.

Broccoli soft rot control.

1. It is necessary to avoid planting with vegetables of the Solanaceae family and melons;

2. When farming, try to avoid damaging broccoli and ensure that it is intact to prevent the invasion of germs;

3. After planting and harvesting, the work of vacating the land, turning the land, and drying the field is carried out to promote the decomposition of pathogens and reduce the occurrence of broccoli lesions.