Broccoli planted produces soft rot, what pesticides are good for treatment?

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.

The most common control methods are the use of pesticides, reduced fertilization, the use of trace elements, and pesticides, which can lead to the most common pests and diseases.

Answer broccoli pest 1, downy mildew symptoms. It is a disease, which is more obvious in the process of flower bulb development, the old leaves first develop the disease, and then spread to the young leaves, and the lack of green in the early stage of the disease, and the leaves turn yellow. When dry, the leaves dry out, and when wet, mold appears on the back of the leaves.

2. Symptoms of soft rot. It is a disease, and broccoli is prone to occur when it encounters more rain in the later stage of growth. The lesions are water-stained, gradually softening and decaying, producing a foul smell; Germs invade from wounds on roots, stems, and leaves.

3. Diamondback moth symptoms. The first instar larvae can only feed on the mesophyll, leaving a transparent epidermis, and the 3-4 instar larvae can eat the leaves into holes, and in severe cases, the whole leaves are eaten into a net. 4. Symptoms of cabbage worm.

The larvae eat the mesophyll, leaving only a layer of transparent epidermis, and only leaf veins are left, which is prone to soft rot when harming the flower bulbs, and insect feces will also pollute the flower bulbs and reduce the value of the commodity. 5. Symptoms of vegetable aphid. The damaged plants are seriously dehydrated, shrinking, yellowing, twisted and deformed, and the damage of vegetable aphid can also cause soot disease and spread virus diseases.

Broccoli disease and pest control method 1, downy mildew selection of varieties with strong disease resistance. Avoid continuous cropping, the soil should be turned deep and whitened, and an appropriate amount of lime should be applied to improve. At the beginning of the disease, spray with 600-800 times of 70% mancozeb wettable powder, or 400-600 times of methamphene.

Stop using pesticides 10-15 days before harvesting. 2. Soft rot. Avoid co-cropping with cruciferous vegetables, especially cabbage and cabbage.

Strengthen field management and cultivate strong seedlings. Avoid injuries and pay attention to drainage after rain. At the beginning of the disease, spray streptomycin sulfate, or 72% agricultural streptomycin wettable powder 3000-4000 times, or new phytomycin 4000 times.

3. In the early stage of the disease, diamondback moth is used to trap and kill adult insects with black light. It can also be sprayed with 500-1000 times of Bacillus thuringiensis preparation, or 1000-2000 times of 50% phosphine emulsifiable concentrate. Stop using pesticides 10 days before harvesting.

4. In the early stage of the disease, spray with BT emulsion, or 500-800 times of No. 6 liquid of green worms, or 1000 times of 50% phoxanthion emulsifiable concentrate, or 3000-4000 times of 20% fenvalerate emulsifiable concentrate. If it rains after spraying, it should be sprayed. Stop using pesticides 10 days before harvesting.

5. Rapeseed aphids are set up in the broccoli field to attract aphids, and the yellow board is 8 pieces per mu. Hang silver-gray membrane strips to avoid aphids, the membrane width is 12-23 cm, and the height is less than 1 meter. At the beginning of the disease, spray with 40% dimethoate 1000 times, or acetamiprid 40% (water dispersible granules) 1000-2000 times.

Stop using pesticides 15 days before harvesting.

First of all, when planting, we must choose the soil is more fertile and wide land, and we must use farmhouse fertilizer when fertilizing, do not use fertilizer bought outside, and also often water the plants, but also often prevent the occurrence of pests and diseases, if there is a situation of small insects, then we must spray insecticides in time. I think that if we can do these things well, we will definitely be able to control broccoli pests and diseases.

It should be that some pesticides can be sprayed during the growth process of broccoli, and it should also be noted that some rotten or yellowed leaves must be pruned off in time.

They use pesticides to control pests, or to understand the situation of pests and diseases, or to use physical control methods, or to place pest removal products around them.

Summary. Use fludioxonil, or copper metha, or copper ammonia, or oxachlor, 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 wither, 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 restore the normal growth of the diseased plants.

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 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 ground is planted with broccoli, and root rot and characteristic pests overwinter in the soil, and when transplanted the following year, the pests and diseases immediately begin to become 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 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 reducedScientific 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. Wound invasion such as disease scars and mechanical injuries, long-term drought and rain in production, excessive squatting, excessive watering, and many underground pests will cause wounds and diseases.

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, and the content of chemical fertilizers is too much, so it will also lead to such a disease.

The common causes are the excessive use of chemical fertilizers for many years, which reduces the number of soil organic matter and beneficial microorganismsLong-term drought and rain, or excessive squatting, overwatering, and underground pests;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.

Broccoli soft rot is a bacterial disease that prefers to stay in a warm, humid environment in the wild. If poor drainage in the field can easily lead to water accumulation after rain, or too dense plant growth can easily lead to excessive humidity in the field, then a large number of soft rot pathogens will 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 and the next crop of 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.