The cause and solution of cyclamen leaves yellowing

Cyclamen is the city flower of Qingzhou City, Shandong Province, and the mascot of the 43rd World Table Tennis Championships held in Tianjin in 1995. Cyclamen (scientific name: Cyclamen persicum), alias turnip, rabbit ear flower, rabbit flower, crown, bonspark, petal lotus, is a perennial herb of Primulaceae cyclamen. Cyclamen is a widely cultivated flower, which is suitable for indoor flowerpots and greenhouse in winter. Some cultivated species of cyclamen have strong aroma, while others have light or no aroma. The word "cyclamen" comes from the transliteration of the scientific name Cyclamen. Because of its ingenious transliteration, the flower name has the meaning of "celestial visitors come". Flowers blooming from autumn to winter. Similar plants of plum blossoms. Often used as a winter gift. Next, the editor of the net will introduce cyclamen.

The cause and solution of cyclamen leaves yellowing

Cyclamen likes light but is afraid of strong light. It is fine to have weak light every day. If it is exposed to the sun, it will cause the leaves to turn yellow. When cyclamen flowers bloom more and more faintly, it is related to lack of light and insufficient fertilization. Fertilization must be professional fertilizer, otherwise it will also cause leaves to turn yellow. Let's analyze and solve the yellowing problem of cyclamen leaves in detail.

Seven possibilities of cyclamen leaves yellowing

1. Lose weight for a long time:

There is no application of nitrogen fertilizer or no change of water for a long time, and the lack of nitrogen and other nutrient elements in the water leads to thin branches and leaves and thin and yellow leaves. It is necessary to change into new culture water in time and gradually apply rarefied mature liquid fertilizer or compound flower fertilizer.

2. Excessive fertilization:

If you fertilize too much, the new leaves will be thick, and the old leaves will be rugged, and the dry tips of the old leaves will fall off. You should immediately stop fertilization, increase the amount of water exchange, make the fertilizer lose, or immediately pour the pot, rinse the bulb root with water and then plant it again into the basin.

3. Hot and hot:

If you put the daffodils in a high temperature and let the strong light shine directly, it is very easy to cause the leaf tip and edge of the young leaves to scorch, or the leaves yellow to fall off. Move to a well-ventilated shady place in time.

4. Excessive shade:

If the daffodils are kept in shade or lack of light for a long time, it will cause the branches and leaves to turn yellow.

5. Alkali in soil and water:

If there is a lack of soluble iron and other elements that can be absorbed by it in the growth environment, the leaves will gradually turn yellow. Acid soil and water should be selected when planting, and alum and fertilizer water should be often irrigated during the growth period.

6. Whether it is airtight or not:

If too much nitrogen fertilizer is applied, the branches and leaves will grow luxuriantly, coupled with the long-term unpruned, resulting in insufficient light in the inner chamber branches and leaves, which is easy to cause the leaves to yellowing and falling off. Reasonable fertilization should be applied and pruning should be strengthened to make it ventilated and transparent.

7. Air drying:

When the indoor air is too dry, daffodils often appear phenomena such as leaf tip dryness or leaf edge scorching. Attention should be paid to water spraying, plastic film cover and other methods to increase air humidity.

Specific cases of cyclamen leaves yellowing

1. Cyclamen leaves are curly and yellowing

Solution: lack of nutrition, pay close attention to fertilization, to the florist to buy special fertilizer can not be too much to supplement the nutrition of flowers, usually a small number of pots can bury some cooked soybeans, cooked peanuts. Bean cakes, changed steamed buns, etc., so as not to worry about lack of nutrition.

2. The stems of cyclamen are rotten and the leaves are yellow.

Solution: too much water. Stop watering until it heals and the soil dries.

3. If you water too much, the leaves turn yellow, but the buds that just grow are less watered. The solution: when the summer temperature is high, cyclamen will go dormant. Watering as little as possible during dormancy, just keep the soil moist to prevent the roots from rotting away due to too much water. When planting, it is advisable to expose the bulbous roots of flowers to 1/3 of the soil. When watering, water directly in the flowerpot, flowers and leaves as far as possible do not touch water, because cyclamen leaves are round and concave in the middle, it is easy to store water, it is not good to leave water marks after evaporation. For a long time, the foliar breathing is not smooth, it is easy to dry and yellowing, affecting the ornamental, it is best to wipe with a soft cloth. When watering, you should see it dry and wet once, and you can't water it every day, because cyclamen has the function of storing water and watering more water, it is easy to produce flower buds. The leaves turn yellow and dry every three days in spring and once every five days in autumn.

4. The leaves are yellow and dry

Solution: cyclamen also yellowing, drying up is mainly caused by the poor permeability of the basin soil and the basin soil is too dry, the better permeability soil can be changed at the temperature of 15-25 ℃, and the watering should be supplied from the bottom, the basin soil can be watered when the basin soil is dry, and the water temperature is close to room temperature.

Xianke maintenance (necessary basic knowledge)

1, lighting: cyclamen should be placed in windows, balconies and other places with sufficient light, and often change the position of flowerpots. Plenty of light can make the flowers more beautiful and the leaves more shiny. Although cyclamen belongs to the shade-tolerant Primulaceae, it is easy to yellowing leaves due to lack of light for a long time.

2, moisture: watering should be properly controlled, too much water will cause rotten roots, but wait for flowers and leaves to wilt slightly before watering, watering can be soaked at the bottom of the basin, do not sprinkle too much water on the leaves.

3, ventilation: cyclamen likes ventilation, smoke and dirty air will make the petals dry and wither, but they can not be placed directly in the tuyere.

4. Temperature: the room temperature above 5 ℃ can make cyclamen grow normally. When the room temperature is low, cyclamen can keep the florescence for a long time, but the flowering is slow; when the room temperature is high, the flowering is fast, but the flowering period is short.

5. Humidity: humidity should be kept at 60%-70%. Too little humidity will make flowers smaller, too much humidity will cause petals, leaves to appear gray mold and other fungal venereal diseases. It is strictly forbidden to spray water on the petals, otherwise they will rot.

6. Fertilizer: apply fertilizer twice a month. Import or domestic compound fertilizer can be used. 5-8 grains are applied each time and placed at the depth of 2 cm in the substrate.

The cause of cyclamen leaves yellowing the solution of cyclamen leaves yellowing

How do cyclamen leaves turn yellow? Is there any way to solve it? Cyclamen leaves yellowing is a common problem in the process of cyclamen cultivation, so what is the cause of cyclamen leaves yellowing? let's take a look at the causes of cyclamen leaves yellowing and the solutions and correct breeding methods.

I. brief introduction

Alias turnip begonia, rabbit ear flower, rabbit flower, a crown, bonspark, petal lotus, is Primulaceae cyclamen perennial herbs. Cyclamen is a widely cultivated flower. Cyclamen's culture method is suitable for indoor flowerpots and greenhouse in winter. Some cultivated species of cyclamen have strong aroma, while others have light or no aroma.

Second, habits

Cyclamen like plenty of sunshine and warm, humid environment, avoid hot, afraid of stagnant water. The most suitable temperature is 20 degrees Celsius, about 20 degrees Celsius, more than 30 ℃ easy to deciduous dormancy, lower than the bulb vulnerable to frost damage, so cyclamen winter culture environment is best for greenhouse growth, requiring loose, fertile, well-drained soil.

Third, the cause of cyclamen leaves yellowing

Cyclamen leaves yellowing reason 1, spray is too strong. Cyclamen, which caused drug damage, should be sprayed with clear water in time to alleviate it.

Cyclamen leaves yellowing reasons 2. Light burns during ventilation. If the previous maintenance environment light is weak or slightly poor, the sudden change of light conditions will make it unsuitable, especially when the outdoor temperature is high (dormant), if coupled with dry air, it is easy to turn yellow.

Cyclamen leaves yellowing 3, caused by drought. When put in outdoor ventilation, the water in the basin soil is not enough, the outdoor high temperature coupled with good ventilation, the plant loses water very quickly.

Cyclamen leaves yellowing reasons 4, now do not need to change pots, if summer does not give dormancy also have to change pots in autumn.

Fourth, the solution to the yellowing of cyclamen leaves

1. At the temperature of 17 ℃-18 ℃, water cyclamen once every 3 days and wait until the soil is dry before watering. In addition, in order to avoid cyclamen leaves yellowing, be careful not to spray water on cyclamen leaves and flowers.

2. It is recommended that flower lovers of cyclamen should water the flowers with pure water or cold boiled water after buying them back, and apply professional fertilizer every half a month, so as to effectively prevent cyclamen leaves from yellowing.

3. After cyclamen leaves turn yellow, you can take the flower ball out of the flowerpot and put it in a plastic bag, then put it in the refrigerator, but the temperature should not be below 0 degrees. After autumn, take out the bulb, pick the old roots and withered leaves, and replant them in the flowerpot. When the new leaves begin to germinate, the normal water and fertilizer management can be restored gradually.

Fifth, the method of cyclamen culture

Cyclamen lighting: cyclamen likes sunshine, so cyclamen should be placed in a sunny place for maintenance. Adequate light is very beneficial to their fertility, but they are afraid of direct exposure to strong light in summer.

Cyclamen fertilization: cyclamen is a fertilizer-loving plant, which is topdressing 2 ‰ potassium dihydrogen phosphate once a year in spring and autumn. Nitrogen fertilizer should not be applied during flowering, otherwise it will cause branches and leaves to grow and shorten the life of flowers.

Cyclamen temperature: cyclamen can not bear high temperature. Too high temperature will put it into a dormant state. Plants above 30 ℃ will stop growing and go into dormancy, while plants above 35 ℃ will easily rot and die. The flowering temperature in winter should not be lower than 10 ℃. If the temperature is too low, the flower color will be dim and easy to wither, and the suitable temperature for growth is 15 Murray 20 ℃.

Cyclamen watering: cyclamen likes to be wet and afraid of waterlogging plants, watering should not be too much, too much watering will cause rotten roots and death. Just keep the soil moist every day.

Cyclamen diseases and insect pests: cyclamen diseases are more than insect pests, the main diseases Botrytis cinerea and soft rot, mostly caused by bacterial infection, the disease site showed softening rot, the application of methyl topiramate or chlorothalonil to prevent.

The above is the relevant introduction of this article, I believe you have a simple understanding of this after reading it, if necessary, you can continue to pay attention to the No. 1 home network to learn more information.

Cyclamen leaves yellowing reasons and treatment methods, cyclamen leaves yellowing how to do

Cyclamen leaves yellow is what reason, cyclamen leaves yellow how to do? Let's take a look at the causes of the yellowing of cyclamen leaves and how to deal with them.

Cyclamen prefers cool, moist and sunny environments. The suitable temperature for growth and flower bud differentiation is 15 ℃ 20 ℃, and the humidity is 70%-75%; the temperature during flowering in winter should not be lower than 10 mol. If the temperature is too low, the flower color will be dim and easy to wither; if the summer temperature reaches 28 ℃ and 30 mol, the plant will dormancy, and if it reaches more than 35 mol, the tuber is easy to rot. The heat tolerance of seedlings was slightly stronger than that of old plants. For middle-sun plants, the suitable light intensity in growing season is 28000Lx, which is lower than 1500Lx or higher than 45000LX, the photosynthetic intensity decreases obviously. It requires slightly acidic sandy loam which is loose, fertile, rich in humus and well drained. The florescence is from October to April of the following year. Cyclamen likes light but is afraid of strong light. It is fine to have weak light every day. If it is exposed to the sun, it will cause the leaves to turn yellow. When cyclamen flowers bloom more and more faintly, it is related to lack of light and insufficient fertilization. Fertilization must be professional fertilizer, otherwise it will also cause leaves to turn yellow. Let's analyze and solve the yellowing problem of cyclamen leaves in detail.

Seven possibilities of cyclamen leaves yellowing

1. Lose weight for a long time:

There is no application of nitrogen fertilizer or no change of water for a long time, and the lack of nitrogen and other nutrient elements in the water leads to thin branches and leaves and thin and yellow leaves. It is necessary to change into new culture water in time and gradually apply rarefied mature liquid fertilizer or compound flower fertilizer.

2. Excessive fertilization:

If you fertilize too much, the new leaves will be thick, and the old leaves will be rugged, and the dry tips of the old leaves will fall off. You should immediately stop fertilization, increase the amount of water exchange, make the fertilizer lose, or immediately pour the pot, rinse the bulb root with water and then plant it again into the basin.

3. Hot and hot:

If you put the daffodils in a high temperature and let the strong light shine directly, it is very easy to cause the leaf tip and edge of the young leaves to scorch, or the leaves yellow to fall off. Move to a well-ventilated shady place in time.

4. Excessive shade:

If the daffodils are kept in shade or lack of light for a long time, it will cause the branches and leaves to turn yellow.

5. Alkali in soil and water:

If there is a lack of soluble iron and other elements that can be absorbed by it in the growth environment, the leaves will gradually turn yellow. Acid soil and water should be selected when planting, and alum and fertilizer water should be often irrigated during the growth period.

6. Whether it is airtight or not:

If too much nitrogen fertilizer is applied, the branches and leaves will grow luxuriantly, coupled with the long-term unpruned, resulting in insufficient light in the inner chamber branches and leaves, which is easy to cause the leaves to yellowing and falling off. Reasonable fertilization should be applied and pruning should be strengthened to make it ventilated and transparent.

7. Air drying:

When the indoor air is too dry, daffodils often appear phenomena such as leaf tip dryness or leaf edge scorching. Attention should be paid to water spraying, plastic film cover and other methods to increase air humidity.

Specific cases of cyclamen leaves yellowing

1. Cyclamen leaves are curly and yellowing

Solution: lack of nutrition, pay close attention to fertilization, to the florist to buy special fertilizer can not be too much to supplement the nutrition of flowers, usually a small number of pots can bury some cooked soybeans, cooked peanuts. Bean cakes, changed steamed buns, etc., so as not to worry about lack of nutrition.

2. The stems of cyclamen are rotten and the leaves are yellow.

Solution: too much water. Stop watering until it heals and the soil dries.

3. If you water too much, the leaves turn yellow, but if you water less, the buds that just grow are withered.

Solution: when the summer temperature is high, cyclamen will go dormant. Watering as little as possible during dormancy, just keep the soil moist to prevent the roots from rotting away due to too much water. When planting, it is advisable to expose the bulbous roots of flowers to 1/3 of the soil. When watering, water directly in the flowerpot, flowers and leaves as far as possible do not touch water, because cyclamen leaves are round and concave in the middle, it is easy to store water, it is not good to leave water marks after evaporation. For a long time, the foliar breathing is not smooth, it is easy to dry and yellowing, affecting the ornamental, it is best to wipe with a soft cloth. When watering, you should see it dry and wet once, and you can't water it every day, because cyclamen has the function of storing water and watering more water, it is easy to produce flower buds. The leaves turn yellow and dry every three days in spring and once every five days in autumn.

4. The leaves are yellow and dry

Solution: cyclamen also yellowing, drying up is mainly caused by the poor permeability of the basin soil and the basin soil is too dry, the better permeability soil can be changed at the temperature of 15-25 ℃, and the watering should be supplied from the bottom, the basin soil can be watered when the basin soil is dry, and the water temperature is close to room temperature. 4. The leaves of cyclamen are curled.

Lighting: cyclamen should be placed in windows, balconies and other places with sufficient light, and often change the position of flowerpots. Plenty of light can make the flowers more beautiful and the leaves more shiny. Although cyclamen belongs to the shade-tolerant Primulaceae, it is easy to yellowing leaves due to lack of light for a long time.

Moisture: watering should be properly controlled, too much water will cause rotten roots, but wait for flowers and leaves to wilt slightly before watering, watering can be soaked at the bottom of the basin, do not sprinkle too much water on the leaves.

Ventilation: cyclamen likes ventilation, smoke and dirty air will make the petals dry and wither, but they can not be placed directly in the tuyere. Temperature: room temperature above 5 ℃ can make cyclamen grow normally. When the room temperature is low, cyclamen can keep the florescence for a long time, but the flowering is slow; when the room temperature is high, the flowering is fast, but the flowering period is short.

Humidity: humidity should be kept at 60%, 70%. Too little humidity will make flowers smaller, too much humidity will cause petals, leaves to appear gray mold and other fungal venereal diseases. It is strictly forbidden to spray water on the petals, otherwise they will rot.

Fertilizer: fertilize twice a month, import or domestic compound fertilizer can be used, 5-8 grains are applied each time and placed at the depth of 2 cm in the substrate.

5. Why the leaves of cyclamen are yellow and dry

Cyclamen is also yellow and dry is mainly caused by the poor permeability of the basin soil and the over-drying of the basin soil. the soil with better permeability can be changed when the temperature is 15-25 degrees, and the water should be fed from the bottom, and the basin soil can be watered only when the basin soil is dry, and the water temperature is close to room temperature.

Cyclamen-maintenance and management

Cyclamen is also known as rabbit ear flower and monk hat flower because of its Corolla shaped like rabbit ear and monk's hat. It is a perennial herb of Primulaceae, with fleshy bulbs, oblate, massive or globular, purplish black. The leaves are fleshy, tufted and mostly heart-shaped. The flower is solitary, and the bud is drooping during the bud development period, and gradually raises its head tall and straight when it opens. There are many colors, monochromatic and complex colors; the flowering period is long, usually from December of each year to May of the following year.

Cyclamen prefers sunny, moist and cool environments, but is afraid of waterlogging. The matrix needs slightly acidic soil with loose air permeability and good drainage, and the mixed substrate of peat and perlite is commonly used in cultivation. It can also be cultivated with rotten leaf soil and slag ash. The substrate must be disinfected and sterilized during cultivation to prevent quenching, root rot and so on.

Cyclamen likes a warm environment, can not bear high temperature and cold, the highest temperature can not exceed 30 ℃, otherwise it will enter dormancy, the high temperature of about 35 ℃ is prone to decay and necrosis. It is best to keep it between 10-20 ℃ in winter. When it is lower than 5 ℃, the growth is inhibited, the leaves curl, the flowers bloom poorly, and the color is dim. In summer, it should be placed in a moist and ventilated place, and the basin soil should be kept in a certain dry state to make it fully dormant over summer.

It likes a humid environment and is not resistant to dryness. It needs to be kept at 60-70% humidity during the growth period, which can make the leaves dark green and shiny. In winter, it can not be placed in the position where heating and air conditioning can be contacted directly to prevent wilting and withering due to air drying. Avoid flowers when spraying water to prevent flowers from withering ahead of time. The water temperature should be close to room temperature.

In the growing period, sufficient light conditions are needed in order to bloom for a long time and bright colors. Placed in the semi-shade can only be enjoyed for a short time, but also to avoid the shady environment, otherwise the leaf color and flower color will fade, the plant will be weak, and in serious cases, it will be difficult to recover until it decays and dries up.

Cyclamen likes water and avoids dampness, and the basin soil needs to be kept moist, but it is necessary to strictly prevent stagnant water or waterlogging, otherwise once the roots rot, the whole plant will die quickly. Because the whole plant of cyclamen is fleshy and not resistant to drought, if the water supply is not timely, the leaves will soon turn yellow and wilt, even after supplementary watering, many leaves will turn yellow and need pruning, seriously affecting the beauty and growth of the whole plant.

Cyclamen is generally appreciated in the family, has entered the flowering period, so basically do not need to apply fertilizer, otherwise it will significantly shorten the flowering period, or even drop flowers and buds. Fertilization is generally selected in the vegetative growth period, nitrogen, phosphorus and potassium need to be balanced, and the flower bud development stage needs to increase the application amount of phosphorus and potassium fertilizer, but must not apply thick fertilizer, strong fertilizer, raw fertilizer, otherwise it is easy to cause fertilizer damage and necrosis of the whole plant. If it is a liquid fertilizer, it needs to be irrigated slowly from the edge of the basin, not from the top of the plant, and rinse the leaves with clean water after fertilization.

Cyclamen generally does not need to reproduce on its own in the family, but it can be done every year after the dormancy period and after the germination of new buds. When changing the basin and changing soil, attention should be paid to making the part of the bulb 2-3-1-2 exposed above the soil surface, so as to prevent the corm from rotting because of high water content in the soil.

Summer maintenance and management

1. Control of water, fertilizer, light and temperature before summer. In late May, the temperature increased to less than 28 ℃, and the light increased gradually, especially in the greenhouse. Cyclamen in this condition, the lower leaves will be withered and yellow, heart leaves wrinkled, petioles soft and sagging, but this is not caused by lack of water or fertilizer, so do not pour heavy water and apply thick fertilizer, otherwise, it is very easy to rot balls. In late May, ventilation and shading measures should be taken in time to reduce light and temperature, reduce watering, keep basin soil semi-dry and semi-wet, and gradually reduce temperature and humidity. Mass production can use greenhouse plus sunshade net, if the family is self-supporting, transfer the flowerpot to the shady place, so that cyclamen enter the summer dormancy state. However, the pellets should be allowed to grow normally and not dormant.

2. Dormant maintenance. Mid-June to mid-August is cyclamen summer dormancy period, should maintain ventilation and cool environmental conditions, do not need to centralize the ball, can be in the original basin. During the dormant period, 500-fold Bordeaux liquid or carbendazim should be sprayed on the basin surface in the middle of June, and the soil should keep the upper part moist and spray water to the basin surface every 3 days. At the same time, the bulbs should be extruded by insects, rats and man-made, and low light treatment should be adopted daily. Do not need to apply fertilizer, regularly check whether the bulbs are dry and shrink or have diseases and insect pests, and take timely measures to find problems.

Autumn maintenance and management

The main results are as follows: 1. In late August, when the temperature decreases, the buds at the top of cyclamen bulb begin to sprout, and the leaf buds change color and elongate. Measures such as basin change, fertilization, watering and light should be taken at this time. Changing the basin generally does not increase the size of the basin, but the big ball can increase the number one, and the general bulb is about 3 cm with a 16 cm basin. Three parts of humus, one part of organic fertilizer and one part of river sand were used in the culture soil, which made the culture soil loose, fertile and permeable. When changing the soil, remove the original soil, do not hurt the fibrous root, remove the dead leaves, put the bulb in the center of the basin, and bury the corm to the depth of 1, 2, 1, 1, 3. It is not good to bury the bulb or float on it. After watering the seedlings properly, fill the bulbs so that the bulbs are exposed to the soil, put them in the shade for 5 to 7 days, and then gradually see the light and humidify them. [2] 2. Foliar fertilizer or liquid fertilizer can be applied when cotyledons grow up to 1 cm. Foliar fertilizer can be sprayed alternately by 0.1% of urea and ammonium dihydrogen phosphate, and can also be poured into the soil, but can not be drenched on the corm. Liquid fertilizer is the best when flower buds appear in late October. The application of phosphate hinge 2cm around the bulb has a good effect and is beneficial to the formation and growth of flower buds. 3. It is also important to raise before flowering. If the leaves do not grow well, they will not produce good flowers. However, excessive application of nitrogen fertilizer in November is also prone to overgrowth. Only long leaves, no flowering, or more leaves and less flowers, the emergence of this phenomenon must timely adjust the three factors of water, fertilizer and light: first, dry and wet, mainly foliar spraying and ground spraying; second, adequate application of phosphorus and potassium fertilizer, appropriate application of nitrogen fertilizer; third, full light; fourth, in addition to the center of long leaves, small leaves, redundant leaves, you can also pull the leaves outward, so that the center of the bulb can see light, in order to facilitate the rapid formation of flower buds and ensure the concentration of florescence.

Cyclamen has more diseases than pests, and it is common in family maintenance:

① Botrytis cinerea. The main symptom is that the lesion has a small spot with a diameter of 1-2 mm, and then gradually expands and shows brown rot. When the petiole or flower stalk is infected, the leaf or flower folds upside down, and there is a gray mildew layer in the lesion, which turns into a yellowish mildew layer, which is caused by high humidity and poor ventilation. The first is timely ventilation to reduce air humidity; the second is to remove diseased leaves in time to reduce the source of infection; the third is to spray Dysen zinc, carbendazim and other broad-spectrum fungicides.

② soft rot. It was mostly caused by bacterial infection, and the disease site showed softening and decay, and the occurrence site was more common in the corm. Mainly matrix disinfection is not complete or no disinfection, high temperature or high humidity is easy to occur. Control methods can be sprayed with agricultural streptomycin or carbendazim and so on.

Cyclamen-disease prevention

First, Fusarium oxysporum cyclamen is very easy to get sick and should be planted in a clean and well-drained place. The main disease is Fusarium oxysporum, which often lurks on the seedlings until it begins to occur after the seedlings are transferred. In the process of transportation, attention must be paid to the management of temperature and humidity, strict disinfection, and disinfection of soil and flowerpots. The yellowed seedlings were thrown away and the seedlings were prevented by methyl topiramate or chlorothalonil 5 weeks after transplantation.

Second, after the seedlings of wilt disease are moved, the stems and leaves are stunted, black fungi appear on the edge of the leaves, and light red lesions appear in the vascular bundle system of petioles and corms; there are large patches of light orange spores on the organs of the residual plants, and the disease will spread rapidly; take out the diseased plants, apply methyl topiramate or chlorothalonil to control.

Third, the symptom of soft root disease is that the plant wilts suddenly, then lodging, and the bulb is small; the main reason is that the bulb is buried too deep, the temperature is too high, the humidity is too high, and so on; it is necessary to avoid watering by spraying in the high temperature season.

Fourth, Botrytis cinerea flowers and leaves appear soft rot, flowers appear spots and gray mold. Reduce the temperature, increase ventilation, increase the distance between seedlings, pay attention to the night temperature is not too low, fungal fungicides can be used to control.

Fifth, the symptoms of Fusarium wilt disease are yellow or brown rings on the petiole, flowers deformed, plants stop growing, the disease is mostly transmitted by thrips, the disease can be controlled by insects.

Cyclamen spider it will cause leaves deformation, curl, part of the flower discoloration, flower stem distortion deformation. Prevention and control of other insect pests

In addition, the common diseases of cyclamen are soft rot and leaf spot. Soft rot occurred in the high temperature season from July to August, causing the whole corm to soften and rot and die. It is mainly caused by poor ventilation. The same amount of Bordeaux solution can be sprayed for 1 or 2 times before the onset of the disease. Leaf spot disease occurred most frequently from May to June, and brown spots appeared on the leaf surface, which gradually expanded, and finally caused the leaf to dry up. Diseased leaves must be removed in time. Nematodes often harm the bulb, the damaged plants grow slowly and the leaves wither and turn yellow, which is often caused by the wet basin soil. Aphids and leaf rollers also damage leaves and flowers during the growing period, which can be sprayed with 1000 times of omethoate EC.