What are the diseases of celery planting in winter? How to control pests and diseases?

Heart rot is often caused by excessive application of nitrogen and potassium fertilizers, low greenhouse temperatures, and dry air, resulting in obstruction of boron absorption. In the early stage of the disease, leaf edge rot will occur, and with the occurrence of heart rot, plants will also have some symptoms of calcium deficiency, resulting in necrosis of young tissues at the plant growth site. Apply more organic fertilizer, control the temperature in the greenhouse, and don't control the water excessively.

Hollow symptoms are mainly caused by insufficient or excess fertilizer, and low temperature and dryness are also important causes. If gibberellin is applied at this time, the hollowness of celery will be further exacerbated. Apply sufficient basal fertilizer, irrigate in time, keep warm and cold, and use less or prohibit gibberellin.

Plant dehiscence is mainly due to the use of some cultivation methods in the early stage of growth to inhibit growth and promote growth in the later stage, resulting in rapid expansion of plants.

With the growth and development of the plant, longitudinal cracking appeared at the base of the petiole on the side of the stem base. Pay attention to the method of promoting the growth of the whole plant, not the method of inhibition. Root rot can occur in celery every growing season, mainly harming the roots of celery.

If infected by a disease, water-like red spots will appear that gradually turn dark brown or dark brown over time. There is a certain difference between black rot and root rot, which not only harms the roots, but also the base of the petioles. When the celery plant is damaged, it turns grayish-brown and slowly spreads, causing the leaves to droop and wilt.

Once celery virus disease occurs, it affects the entire plant, mainly the leaves. Yellow or brown spots may appear at first, but gradually the whole plant will start to turn yellow. In severe cases, the whole celery plant will curl, dwarf, and die.

Choose the right celery variety, paying special attention to disease resistance and adaptability. Of course, you have to combine your own local characteristics and adapt to local conditions. Celery rotation is also effective for disease control.

If it is planted in a greenhouse, pay attention to light, ventilation, etc. And keep the temperature and humidity in the greenhouse appropriate. In the case of low temperature, it should be kept warm in time, the planting density should be reasonably controlled, and the ventilation and transparency should be increased.

Sclerotinia sclerotinia sclerotinia (Sclerotinia sclerotinia) can occur during the entire growth period of celery, the main damage is the stem and petioles, these two parts will appear brown water stains when the disease occurs, if the humidity is high, there will be white hyphae, when the disease continues to develop, the affected parts will gradually rot, but there is no peculiar smell.

Celery heart rot, celery hollow, celery plant split, leaf edge rot, celery stem crack and other pests and diseases. Apply more organic fertilizer, control the temperature in the greenhouse, and do not control the water excessively. Keep warm and cold, use less or prohibit gibberellin.

Spray new high-fat film to prevent the occurrence of diseases, and use fumigation to control pests and diseases.

Celery heart rot.

Heart rot is often caused by excessive application of nitrogen and potassium fertilizers, as well as low temperature and dry air in the greenhouse, which causes boron absorption to be blocked. At the beginning of the disease, leaf edge rot will occur, and with the occurrence of heart rot, the plant will also show some symptoms of calcium deficiency, which will lead to necrosis of young tissues in the growth point of the plant.

Prevention and control methods: apply more organic fertilizer, control the temperature in the greenhouse, and do not control the water excessively.

A normal growth cycle of celery is three months, and under normal circumstances, the yield of celery grown in the open air may be reduced, with a yield of about 2,000 3,000 kg per certain and a yield of about 10,000 kg per mu of celery grown in protected areas in winter compared to that planted in early spring. If the varieties of celery are different, there will be a certain difference in its yield, and the yield of celery grown in the cold shed in the village is about 5,000 kilograms. <>

On the whole, a growth cycle of celery should be based on the climate, celery is a vegetable that often likes cold climate, it is a semi-cold-tolerant vegetable, not resistant to high temperature at all, so spring and autumn are the best seasons for celery growth, and it is also a time period with a relatively long growth cycle. Sakura.

Generally speaking, we sow seedlings in January and February in autumn, and in March and April, we can harvest celery from the end of May to mid-July. If it is delisted in the protection shed, then the seedlings will be raised around July, and the goods can be received in 1 March, and the overall growth cycle is about 80 90 days. <>

The control method of celery is actually very simple, that is, before planting, we should try to choose some varieties with strong disease resistance to plant, when sowing, first of all, we must use warm water of about 48 degrees Celsius to soak the celery seeds for about half an hour, so that it can be very effective in preventing some diseases brought by the seeds before sowing. It is also necessary to carry out a reasonable fertilization, if it is found that there is diseased iron, then remove it in time to avoid expanding the range, and also pay attention to the air circulation of the celery environment, to avoid moisture. If necessary, you need to spray some medication for prevention and **.

Celery is a food with many benefits, if we eat celery regularly, it has some effects of dispelling wind and dampness, cooling blood and stopping bleeding, and lowering blood pressure.

About three months, you should deal with Xun Heli seeds in advance, try to choose high-quality seeds, but also top dressing in time, eat more big fertilizer, but also increase some organic fertilizer, but also pay attention to the density of Mu Qiao planting and regular ventilation, so that you can prevent pests and diseases.

The growth cycle of celery is generally about three trembling months. In normal times, you can spray pesticides to prevent pests and diseases in advance, and then apply more household fertilizer and farm fertilizer to celery in normal times, so as to prevent the occurrence of pests and diseases.

The growth cycle is about 30 days. It is necessary to choose varieties with high hail quality and good quantity, and strong disease resistance for planting, and then timely watering and fertilizing the source of Xunqi, and then spraying pesticides to prevent pests and diseases. Changru.

Common diseases: soft rot, soft rot, virus disease, early blight, sclerotinia sclerotinia disease.

Soft rot: This disease usually occurs during the transplantation of celery when it is young, or during the growth period after transplantation. When the disease is severe, it causes celery to rot and emit a pungent foul smell.

Heart rot: This disease can overwinter in the soil, and will spread with the soil to the plants the next time it is planted. It is easy to cause this disease when the temperature reaches more than 36 degrees Celsius and below 12 degrees Celsius.

The best temperature for celery is between 27 degrees and 30 degrees. At the same time, germs can also be transmitted through watering, insects, etc.

Viral disease: This disease mainly erodes the leaves of celery. Originally it also occurred first by the leaves of celery. This disease is mainly caused by too high and too low temperatures. Between 20 and 25 degrees, combined with the rain and humidity of the air, it is easy to trigger the disease.

Early blight: It is the same disease as spotted disease. It can occur both at the seedling stage and after adulthood. The main cause of this disease is also due to excessive temperature and humidity.

Sclerotinia sclerotinia disease: Celery can get sick throughout the growing season, and the main cause of this disease is also caused by excessive temperature and humidity.

Prevention and control methods: 1Try to choose varieties with strong disease resistance before planting.

2.Before sowing, soak the seeds in warm water at 48 degrees for about half an hour, which can effectively prevent and control the diseases brought by the seeds before sowing.

3. Reasonable fertilization, and timely removal of diseased bodies to prevent spread. Pay attention to the circulation of air and avoid moisture.

4 Can be prevented with drug sprays and**.

Common insect pests: aphids, spotted divers, vegetable moths, jumping beetles, etc. Control measures: imidacloprid, aphid mite, spotted latent and other drug sprays can be used to kill.

Celery, also known as celery, wormwood, salsa, salsa, medicinal wormwood, and wild coriander, is a bi-annual apipo. Aibao is an important vegetable in China. Clear away heat and liver, refine and detoxify, strengthen the stomach and invigorate blood, have good edible effects, and are convenient to manage, and now many farmers have planted them.

The base of the diseased plant and the base of the petiole first turn yellow and brown near the soil, and then the diseased part gradually softens, darkens and decays. The decomposed part also emits a pungent odor that eventually causes all the celery to die. In addition, the disease often occurs in the presence of continuous rainfall and rainfall or very wet soil.

Soft rot mainly affects the petiole or the base of the stem. Environments with a lot of rain can easily cause diseases. In the early stage of the disease, there are more water stains in the lesion site, and later it becomes irregular light brown patches, and only the epidermis is left to decay.

Control methods: selection of disease-resistant varieties, rotation with potatoes, corn and other crops for more than three years.

Many vegetable producers do not pay attention to early disease prevention and control. When they find that the field is not properly managed, it often leads to infection, disease or dead trees in large areas of healthy vegetables, resulting in severe yield drops and losses. The massive decay of the pulp is caused by a pathogen called carot erwinia, which can infect at temperatures of 2-40 degrees Celsius and multiply in environments with humidity of more than 20%, but is best suited for growth, multiplication, infection and spread in environments with a soil pH of 25-35 grams and humidity of more than 90%.

Avoid harmful roots, do not cultivate soil too high, pay attention to drainage in the rainy season, water less or stop watering in the early stage, and remove infected plants in time once found. The disease point should be formally disinfected with 1:20 times or replaced with guest soil, or sprinkled with some lime to disinfect the soil, mix and sow with the soluble powder in Nongkang 751 powder or Fengling powder according to 1% of the seed weight, or use 15ml of 100 times of 2% Nongkang 751 water solution, mix 200g, sow after Secas, and in the sowing furrow, 5kg of 2% Nongkang 751 water agent or 1kg of soluble wind chime powder, add 50kg of water and evenly spread it on the slope top and slope of the ground.

Be sure to put the celery in plastic wrap while removing it all from the rotten area, and then place it in a cool place away from the sun.

In such a situation, it is recommended to use some anti-bacterial and insecticidal agents as much as possible, and then mix them in water for watering, and secondly, you should also buy some special anti-insect drugs, so that it will be better.

It is necessary to water in time, to ventilate in time, to pay attention to the density of planting, to fertilize in time, and to control the temperature.

It is necessary to carry out the prevention and control work in advance, we must choose the right varieties for planting, we must pay attention to the clearing of the land, pay attention to the protection of the land, and we need to fertilize and water on time.

<> under normal circumstances, the yield of celery planted outdoors is likely to be slightly reduced, a yield of about 2000 3000kg per certain person, and the yield of celery planted in the winter reserve is about 10,000 kg compared with the yield of 1 mu planted in early spring. If the type of celery is different, its yield will be different, and the yield of celery grown in the cold shed in the village is about 5000kg.

In general, a growth cycle of celery should be based on the climate, celery is a kind of vegetable and fruit that likes a wet and cold environment very much, he belongs to the semi-low temperature resistant vegetables and fruits, not heat-tolerant at all, so spring and autumn is the best season for the growth and development of celery, and it is also a time range with a longer growth cycle.

Generally speaking, we sow seedlings in January and February in autumn, and in March and April, the celery can be harvested from the end of May to mid-to-late July. If it is in the maintenance shed and the dust is trapped, then it is up and down in July, and the pick-up can be carried out in the case of 1 3 months, and the overall growth cycle is around 80 90 days.

In the case of sowing, the first thing to do is to use warm boiled water within 48 degrees to soak the celery seeds for about half an hour, so that you can avoid some diseases required for sowing seeds before sowing.

It is also necessary to carry out a scientific and reasonable fertilization, if you feel that the disease is iron, then it will be eliminated immediately to prevent continuous expansion, and you also need to pay attention to the indoor ventilation of the natural environment of Celery, to prevent dampness and cold. In the necessary process, some medicine must be sprayed to prevent and heal. Celery is an ingredient with many benefits, if we eat celery often, it has some effects on wind, heat and dampness, blood dispersion and hemostasis, and heart rate.

The main pests of celery are aphids, spotted loons, root-knot nematodes, etc. Aphids can be sprayed with 10% imidacloprid wettable powder 3000 times or 50% anti-aphid wettable powder 2000 times. Spotted loon flies can be sprayed with 50% latent gram wettable powder 3500 4000 times or avermectin emulsifiable concentrate 3000 times.

Root-knot nematodes can be sown or planted, and 5 kg of 10% Limanku (gram phosphorus) granules can be applied per mu of furrow or hole. During the growth period, the roots can also be irrigated with avermectin EC 1000 times.