Why does cauliflower rot roots? How to prevent it with medication?

Blight fungus mainly infects the rhizomes of seedlings, causing the rhizomes to turn black or overflow, and the infected plants will see leaf wilting after a few days, and the severe ones will die. The main reason is that the soil is carried by bacteria, seeds and manure. Since the hairy flowers mostly occur when the cauliflower is about to ripen and be picked and marketed, it is due to the sudden drop in temperature or the occurrence of foggy weather (cauliflower sown and transplanted in autumn is more likely to have such weather and physiological conditions).

In the same plot, the crops planted near the big trees produce hairy flowers, and everything is normal when they are far away from the trees, and I think that the temperature near the trees may be lower than the temperature in the field due to climate change, so the hairy flowers are produced. Autumn temperatures can vary greatly throughout the day, especially in late autumn.

<> some areas vegetable farmers want to plant this "winter" cauliflower, which generally begins to emerge in November, and will continue until March next year to enter the official growth period. If early flowering occurs, it happens when the cauliflower is winter. By late winter and early spring, flower bulbs appear prematurely on cauliflower leaves that have not yet grown.

This year's overwintering cabbage also showed a large area of early sprouting, which is also affected by the warm winter, and the mechanism of the impact is the same as that of cauliflower. After the cauliflower that overwintered the seedlings was shortened and planted in November, the vernalization of greens that should have occurred in early spring appeared earlier than early winter. By the end of winter and early spring, the leaves of the cauliflower have not yet grown into flower bulbs, which causes the phenomenon of early flowering of the cauliflower.

The temperature of the seedling stage is 8 23, the temperature of the rosette stage is 15 18, and the temperature of the flower bulb development stage is 15 20. Autumn cultivation should strengthen the management of water and fertilizer in seedbeds to prevent drought. At the same time, the top dressing should be early, mainly to promote, so that the flower buds can form a sufficient number of leaves, developed roots, and thick stems when differentiating.

The winter performance of pine cauliflower was relatively weaker than that of ordinary cauliflower at the same maturity stage, and the flower bud differentiation of medium-early maturing varieties through vernalization stage was about 5-6 true leaves, and the flower bud differentiation of late-maturing varieties at 6-7 true leaves could be carried out through vernalization stage.

Mainly because the drainage work is not done in time, so there is a rotten root phenomenon, at this time you should go to the sun, and there is to spray some pesticides, but also to avoid some pests and diseases, so that vegetables can grow better.

This is because there is too much water in the cauliflower soil, and there are some insect eggs in the soil that have eroded the roots of the cauliflower. When planting cauliflower, plant it in the ground with a bucket of medicine.

Causes: First, the pathogen can overwinter on the cellar seeds, soil, and diseased residues, mainly on cruciferous vegetables alternately throughout the year, without obvious dormant period. The second is to spread through rainwater, irrigation water, infected manure, insects, etc., from natural cracks, insect wound scars and mechanical wounds.

Solution: First, turn the ground and dry the field in time after the end of the cultivation season. The second is to select plots with high terrain and not easy to accumulate water for high ridge mulching film cultivation.

The third is to apply enough fully decomposed organic fertilizer, timely and appropriate top dressing, frequent watering, avoid flooding, and timely discharge of stagnant water in the field after rain. Fourth, pay attention to the prevention and control of insect pests such as yellow-striped jumping beetles. Fifth, timely prevention of bacterial soft rot, irrigation of roots with pesticides, the main agents carbendazim, methyl tobuzin, etc.

Rich in nutrients, it is an annual herbaceous plant, and it is also an important cash crop in many regions, and it is one of the oil crops in people's daily life, especially in the main peanut producing areas in the north, most of them use peanut oil as the main edible oil in daily life. Only when the plant and rhizome rot will the fruit rot. If there are strong plants and well-developed tree lines, even if they are bitten by pests, they can only cause wounds, not rot.

Of course, it's another thing for pests to bite off the root system, but it's also related to the root system.

<> is a disease that often occurs during the growing season of peanuts. In general, the main diseases that cause peanut fruit rot are root rot, stem rot and blight, among which peanut root rot and stem rot can occur in the whole growth and development period of peanut. Germs and rotten fruits:

When the long-term drought or the water content exceeds a certain limit, the root rot of peanuts will be caused, and then the infection of pathogens will occur, and the phenomenon of peanut rot will appear.

Drought and flood rotten fruit summer and autumn precipitation, if the peanut field is easy to accumulate water, and not discharged in time, the formation of waterlogging, resulting in peanut growth and development stunt, root physiology is blocked, the plant is thin, the flowering position is high, the seed setting rate is low, it is necessary to water in time, in order to prevent and control the peanut fruit stalk gradually aging and rotten fruit due to drought. In case of heavy rain or heavy rain, it is necessary to pay attention to timely drainage to prevent rainwater from flooding the peanut root system and fruit pods, which will affect the absorption capacity of the root system and fruit pods and cause fruit rot.

Rodent damage rotten fruit: pods from swelling to maturity and development, after suffering from vole damage, the prevention and control of rotten fruit disease caused by the invasion of germs is generally prevented in advance, once the disease occurs, more or less will be affected, after the onset of the disease, the agent carbendazim, thiophanate-methyl can be sprayed, and the root can also be directly irrigated for control. Before peanut sowing, it should be 3-5 days in advance to dry the seeds with skin, choose sunny weather with better sunshine, spread the peanuts and put them in the sun to dry, you can use the ultraviolet rays in the sun to kill the bacteria attached to the peanut shell, can reduce the occurrence of peanut rot in the later stage.

It is usually caused by root rot. The use of high furrow cultivation to prevent flood irrigation, before the onset of the disease with pesticides to irrigate the roots, if the field humidity is high, can be prepared into medicinal soil sprinkled at the base of the stem.

The phenomenon of root rot in cauliflower is mainly infected with gray mold, and gray mold is a difficult disease to control. Therefore, in order for cauliflower to grow better, we should use pesticides in moderation for prevention.

The main cause of root rot in cauliflower is root rot. The main methods of prevention and control of this disease are: timely spraying of pesticides, prevention and control of pests and diseases, and at the same time ensure sufficient light.

1. Causes. The main cause of root rot in cauliflower is due to Wheel Kai root rot. The main object of root rot is the roots of cauliflower.

In the early stage, the cauliflower group will appear yellowing, and there is no abnormality in the aboveground part. The disease then gradually expands over time. When the temperature is high, the aboveground leaves appear to fall and wilt, and recover at room temperature.

When the taproot is severely damaged, the base of the cauliflower stem withers and retracts. After 3-4 days, a dark rotting wax pie appears, and the above-ground parts gradually die.

2. Disinfectant. The first thing to do is to choose a high-quality variety with strong disease resistance. Then the seeds are disinfected, and the seeds are first dressed with antibacterial agents.

Or the seeds are soaked in an antimicrobial agent to destroy the bacteria inside the seeds. Then disinfect the soil and turn the soil deeply to ensure thorough disinfection and reduce the number of pathogens. Finally, it is necessary to pay attention to the prevention and control of insect pests in the soil, avoid the invasion of pests carrying pathogens, and use drugs such as methyl frost and mildew to prevent and control after the onset of the disease to avoid the spread of the disease.

3. Field management. After harvesting, the field should be cleaned up in time to avoid bacterial residues. Then turn the soil deep and destroy the overwintering grounds of pests and diseases.

When transplanting, it is necessary to pay attention to prevent cauliflower injury, tidy up the plants, and prevent soil water accumulation, which leads to the creation of conditions for root rot. After planting, we should pay attention to weather changes, water reasonably, avoid water evaporation, and isolate the transmission route of pathogens. In the important periods such as the flowering and fruiting stage and the expansion period of cauliflower, it is necessary to apply phosphorus fertilizer appropriately to improve the disease resistance of cauliflower and promote the healthy growth of cauliflower.

Caused by abnormal temperature and climatic conditions. This mainly affects the cauliflower planted in spring, generally the growth rate of cauliflower is greater than the speed of its nutrients, and the phenomenon of early flowering will directly occur. The warm winter also caused the autumn singing and winter shortening, so that the cauliflower overwintering with small seedlings was planted in November, and the plant stem thickness and leaf number in early winter had reached the requirements of green vernalization.

<> strictly control the amount of seedlings produced If the temperature is persistently high, in order to prevent the seedlings from growing too fast, chlormequat can be used appropriately to inhibit their growth. Or use the method of transplanting seedlings and false planting, false planting will cause damage to the root system, sowing at the appropriate time, when planting in autumn, select some varieties with early maturity in autumn and strong heat tolerance can be sown early. Spring planting should not be too early, should be the average daily temperature stable above 6 (10 cm at the surface temperature of 5) before planting.

Spring climate, often appear "inverted spring cold", if the high temperature after planting repeated or repeated rain, low temperature, pine cauliflower in the ground temperature stable above 10 when planting is more suitable conditions. Cause the phenomenon of "early flowering". Before sowing the cauliflower of the seedlings, pay attention to the weather forecast, if the winter temperature is predicted to be low, in order to ensure that the field is planted before freezing, you can sow it in advance, if the forecast is a warm winter year, you must sow it late.

Reasonable dense planting of cauliflower is the key technology for high yield, but different varieties have different colonization densities. In general, early-maturing cauliflower varieties are appropriately densely planted, followed by medium-maturing varieties, and late-maturing varieties are slightly rarer. Autumn sowing period in June and July, is in the high temperature and rainy season, cauliflower seedlings in the high temperature and high humidity environment is easy to grow, and rot and die seedlings, and early varieties of seedbed must not be drought, otherwise the seedlings grow slowly, resulting in rigid seedlings, the phenomenon of "early flowering", cauliflower, in order to achieve high quality and high yield, pay attention to the reasonable application of base fertilizer.

We can increase the proportion of rotted farmhouse fertilizer, which can improve the quality of cauliflower, but also improve the resistance of cauliflower and reduce disease.

In fact, it is not particularly normal for such a situation to occur, but it can also be remedied by adjusting the external environment.

Strictly control the growth of seedlings. During the period of cauliflower seedlings, attention should be paid to the method of squatting seedlings to prevent seedlings from growing. If the temperature continues to be high and the seedlings are found to grow too fast, they can be sprayed with growth inhibitors such as mequat to inhibit the growth of the seedlings.

It is also possible to inhibit the growth of seedlings by transplanting seedlings and false planting, because false planting can destroy the root system of seedlings, so as to achieve the purpose of inhibiting the growth of the aboveground part of seedlings and delay the vernalization time of seedlings. Strengthen spring field management. After the temperature rises in spring, top dressing should be carried out in time to accelerate the vegetative growth of cauliflower and prevent the transformation to reproductive growth.

It can be remedied, and this is a time when light should be reduced and a lot of hydration can be carried out, so that you can re-enter the vitality of the rejuvenating creature.

Can be remedied. During the cauliflower seedling rearing period, the seedlings can be stopped by squatting. Or spray with growth inhibitors such as chlormequat to achieve the purpose of inhibiting the growth of seedlings.

Let's talk about the topic of pest control during cauliflower seedling. Cauliflower is a typical cruciferous plant, it can also be called cauliflower, the origin is Europe, it is currently very popular in the vegetable market, its taste is fresh and sweet, the taste of beautiful cauliflower planting is in late March to start seedlings, and so on in early May when you can transplant and plant, after about 60 days of growth period, in July can be mature.

<> and autumn planting cauliflower is generally in late June seedlings, transplanting and planting before and after the beginning of autumn, harvesting around October, nutrient content in the public vegetables or leaves are damaged, the initial nearly circular green spots, after expansion, dark brown in the middle, pale green at the edges, with or without obvious wheel lines. When wet, the surface is densely covered with black mold. Crop rotation with non-cruciferous crops.

In the early stage of the disease, 500 600 times of 75% chlorothalonil wettable powder was used, and 5% Ruijin special suspension was used 17ml-34ml per 667 square meters in the peak incubation period, and 50L-75L of water was added, or 2000 times of 5% anti-Taibao emulsifiable concentrate, which was suitable for irrigation. Because cauliflower is a vegetable that needs water very much, the plant spacing is about 15cm.

The row spacing is about 20cm, apply farmhouse fertilizer and compound fertilizer, these steps are completed, cover the film, take out the vegetables, and apply the insecticidal liquid to prevent the insects from eating the heart or the temperature of the young cauliflower planting is between 11 and 25 degrees, the most suitable temperature for the growth of flower bulbs is about 18 degrees, if the temperature is lower than 10 degrees, the flower bulbs will grow slowly, when the temperature is above 25 degrees, the flower bulbs are loose and small. Therefore, in the northern region, cauliflower insects were sprayed with avermectin emulsifiable concentrate 3000 times before the 2nd instar. The above agents should be rotated and used alternately, and it is important to avoid harming the entire growth and development period of single cabbage.

It mainly sucks the leaf sap by nymphs or adults, and gathers into a clump on the back of the leaves, secreting yellow honeysdew to cause the cauliflower leaves to turn yellow and eventually fall off. In addition, aphids are also vectors for the spread of viral diseases, causing plants to yellow, or even die.

If you want to grow cauliflower well, fertilizer and water management is very important, so do you really know how to fertilize cauliflower in spring? I don't know if it doesn't matter, so let's introduce the method of spring fertilization of cauliflower for you in detail to help you better plant cauliflower.

Methods of cauliflower fertilizer and water management:

Fertilization and planting of land preparation, selection of fertile land for cultivation, application of rotting organic fertilizer, ternary compound fertilizer, timely ploughing, raking and leveling after application, and timely cleaning of drainage ditches to keep drainage ditches unblocked. The planting period can not be too early, the greenhouse in mid-February, the small arch shed in mid-to-late February, the mulch film cover in mid-March is appropriate, planting with soil, spraying a new high-fat film after planting, can improve the survival rate, restore the vigorous plant.

Field management, after planting, should be promoted with large water and fertilizer, spring drought should be watered frequently, keep the soil moist. Arch shed cultivation should be stuffy for 3 to 5 days to raise ground temperature and promote rooting and survival. After returning to the seedlings, according to the weather changes in time, the shed is mastered in 25 28 during the day and 10 15 at night.

About 10 days after planting, urea is applied according to the growth of cauliflower, and watered in time. When the flower bulb and egg are large, the ternary compound fertilizer was applied, and boron fertilizer was applied 1 2 times in combination with the top dressing outside the root, and the vegetable fruit Zhuang Tiling was sprayed to increase the yield and prevent the flower bulb from being black and hollow.