What to do when lotus leaves turn yellow and dry up, and what causes lotus yellowing (cut dead leaves and spray pesticide)
The lotus is also known as the sacred lotus and is one of China's top ten famous flowers. In nature, any plant can get “sick”, and yellowing and drying lotus leaves are among its symptoms. So what should you do when lotus leaves turn yellow and dry up? First we need to find out what the problem is, then treat it accordingly. Let's follow the editor below to see what causes lotus yellowing.
1. What causes lotus yellowing: light and temperature
Since ancient times, the lotus has been deeply loved by people. Earlier we talked about how to grow lotus and the benefits and effects of lotus; now let's discuss a common problem: what to do when lotus leaves turn yellow and dry up, and what causes lotus yellowing. There are many reasons lotus leaves turn yellow: it may be caused by strong light, or it may be improper fertilization, temperatures that are too low, and so on. Below we explain the solutions one by one.
2. What to do when lotus leaves turn yellow and dry up: treat the cause
1. Insufficient light
The lotus is a sun-loving plant. Insufficient light can cause the lotus branches and leaves to grow leggy, the leaves cannot carry out normal photosynthesis, and chlorophyll synthesis is affected, causing the leaves to turn yellow.
Solution: Make sure it gets plenty of sun. Potted ornamental lotus must be placed in a sunny spot, not in a shady place.
2. Soil or water is strongly alkaline
Soil or water that tends toward alkaline affects the absorption of trace elements by the ornamental lotus root system, and the symptoms of deficiencies in elements such as iron, magnesium and sulfur mostly appear as what we commonly call watermelon rind patterns.
Solution: Adding a little ferrous sulfate to the water is a good method; it can adjust the pH and also supplement iron.
3. Improper fertilization
Both over-fertilization and lack of fertilizer can cause lotus leaves to yellow. For beginners growing lotus, over-fertilization is generally the more common cause. Yellowing from lack of fertilizer mostly shows as the color of young leaves becoming lighter, turning yellow or pale green, while older leaves remain relatively normal or gradually turn from green to yellow. Leaf yellowing caused by a lack of nutrient elements mostly occurs during the growing period and the later stage.
Solution: Too much fertilizer burns the roots. If root burn occurs, it is recommended to replant, switching to plain soil for cultivation, and at the same time spray the leaves with water more often. After digging out the lotus rhizome, you can observe the condition of the root system to confirm whether the diagnosis is correct. Roots that are partly blackened, short, or absent indicate root burn.
4. Freeze damage or disease
A sharp drop in temperature or too great a temperature difference can cause new leaves to turn yellow and shrivel, with the leaves curling inward. Pay attention to cold protection; just don't leave the potted lotus outdoors where the temperature is too low. Fungal diseases generally appear as yellow spots of varying sizes on the leaves, which gradually turn brown and necrotic; the diseased spots often have a powdery or cottony substance. You can use carbendazim, but do not overuse it, otherwise it may have the opposite effect.
The lotus is a very easy flower to grow. Pay attention to its light and temperature, and growing lotus well is no problem. From the answers above, you now know what to do when lotus leaves turn yellow and dry up, and what causes lotus yellowing, right?
What to do when potted lotus gets bugs, lotus pest and disease control / cut dead leaves and spray pesticide to kill insects
In nature, any plant can get bugs, and of course the lotus is no exception. The lotus is one of China's top ten famous flowers; it emerges from the mud unstained and is deeply loved by people. Nowadays many households grow lotus, but they don't know what to do when lotus gets bugs. Let's follow the editor below to look at lotus pest and disease control.
1. What to do when lotus gets bugs: spray pesticide to kill insects
The lotus is one of China's top ten famous flowers. With advances in potting techniques, many people have started growing lotus at home. What to do when lotus gets bugs is the most common question. Common lotus pests include aphids, water maggots, stinging caterpillars, and the cotton leafworm, among others. Different pests require different control methods. Let's follow the editor below to look at lotus pest and disease control.
2. Lotus pest and disease control
1. Aphids
Aphids generally begin harming the floating leaves and small upright leaves of lotus in early May, often congregating on leaf buds, flower buds and the undersides of leaves. Larvae and adults cluster together to suck sap, with the damage most severe in late spring and autumn. Control method: A 2000-fold dilution of 20% fenvalerate can be used.
2. Pear green stinging caterpillar and brown stinging caterpillar
The pear green stinging caterpillar and brown stinging caterpillar, commonly known as stinging caterpillars, mainly harm upright leaves in the larval stage, generally from mid-June to September. Control method: Remove and burn infested leaves. Spray with a 800-1000 dilution of 90% trichlorfon, or a 3000-fold dilution of 2.5% deltamethrin.
3. Water maggots
The larvae suck sap on the lotus stem nodes and roots, causing diseased leaves to turn yellow. Control method: Lime can generally be used to drive them away and kill them. Spread 10-15 kg per 667 sq m (1 mu), but do not apply excessively.
4. Large bagworm
It mainly harms upright leaves. In severe cases, twenty to thirty of them can hang on the undersides of lotus leaves, eating new and old lotus leaves full of holes, or even eating them completely.
Control method: Hand-picking can be used to remove them, and diseased leaves should be removed promptly. Spray with a 1500-2000-fold dilution of 90% trichlorfon plus an 800-fold dilution of Bacillus thuringiensis. Clear weeds around the lotus field and carry out disinfection. Let's continue below with lotus pest and disease control.
5. Cotton leafworm
Also known as the lotus taro caterpillar and the cotton leafworm. Newly hatched larvae cluster on the undersides of leaves to feed, leaving only the upper epidermis and veins, so the damaged leaves look like window screens. After the third instar they disperse to cause damage, eating the leaves into notches; when they occur in large numbers they can eat the leaves completely, and even bite the young tender stems. When an outbreak occurs, after the larvae eat up one field they can migrate in groups to neighboring fields to cause damage.
Control method: Spray with a 500-800-fold dilution of domestic B.t. emulsion or Bacillus thuringiensis No. 6 liquid. Spray with a 1000-fold dilution of 50% phoxim emulsifiable concentrate, or a 3000-fold dilution of 2.5% deltamethrin emulsifiable concentrate, or a 4000-fold dilution of 21% methomyl emulsifiable concentrate. From the introduction above, you now know what to do when lotus gets bugs, right? Let's look below at lotus disease control.
3. Lotus disease control
1. Black spot disease
In the early stage of the disease, chlorotic yellow spots appear on the leaves; later they become round or irregular, turn brown and develop concentric rings, sometimes with a yellow-green halo at the edges, and black mold layers grow on them, 5-15 mm in diameter. In severe cases, the spots join together, and except for the veins the whole leaf withers and turns yellow. This disease is caused by fungi and occurs severely in the rainy season. In lotus ponds or potted continuous cropping, as well as when too much nitrogen fertilizer is applied or when summer water temperatures are too high, the disease is very severe.
Control method: Strengthen cultivation management and promptly remove diseased leaves. For severely affected plants, replace the soil with new soil before replanting, and do not apply excessive nitrogen fertilizer. When the disease occurs, spray with a 600-800-fold dilution of 75% chlorothalonil for control.
2. Rot disease
It mainly harms leaves, flower stalks and lotus rhizomes. When it harms leaves, green wilt-colored patches first appear along the leaf margins. Soon the lesions spread inward, and finally the whole leaf turns brown and necrotic. When flower stalks are affected, they turn brown and sunken along the stomatal lines. When lotus rhizomes are affected, they first turn brown, gradually spread to the rhizome nodes, and necrose longitudinally; white filamentous matter or pink powdery masses can also be seen growing from the diseased rhizome nodes. This disease is usually more severe under continuous cropping and in poor soil, and leaves that are constantly submerged in water are also prone to the disease.
Control method: Fertilize appropriately, and take care that the water level is not too high, so as not to soak the leaves and cause disease. When black spots are found on leaves, remove the diseased leaves as early as possible, but the junction between the leaf and the petiole should be retained to prevent rainwater from entering the plant through the petiole wound. Spray with a 500-fold dilution of 50% carbendazim, or a 500-fold dilution of 50% phosethyl-Al for control.
3. Brown spot disease
It mainly harms lotus leaves. Round spots 0.5-8 mm in diameter appear on diseased leaves, pale brown to yellow-brown, with darker edges. In the later stage of the disease, many small black mold spots grow on the lesions. The disease is more severe in rainy autumn weather. The pathogen mostly overwinters on plant debris.
Control method: Clear away residual leaves to reduce the source of disease. For severe cases, spray with a 500-fold dilution of 50% carbendazim, or use a 500-800-fold dilution of 80% zineb for control. The above is all the content on lotus pest and disease control and what to do when lotus gets bugs. We hope it helps you.
Lotus bamboo: Lotus bamboo illustrated guide: how to grow lotus bamboo / how to propagate lotus bamboo
Lotus bamboo profileLotus bamboo
Aliases: lotus bamboo, lotus-leaf bamboo
Category: shrub flowers
Family and genus: Plantae, Angiosperms, Monocots, Liliales, Asparagaceae, Dracaena
Bloom period: does not bloom
Lotus bamboo is a species under the genus Dracaena in the Asparagaceae family. Lotus bamboo is suitable for water culture, potting and hydroponics. It has extremely high ornamental value and is one of the few greenery and decorative items that can be placed indoors for a long time. The optimum growth temperature for lotus bamboo is 25-30 degrees, and the nighttime temperature in winter is best not lower than 8 degrees. Lotus bamboo combines "blooming flowers bring wealth" and "bamboo brings peace", making it the best gift for a sweetheart or a friend. Lotus bamboo has extremely strong adaptability and can grow well in full light, partial light and shade. It likes a high-temperature, high-humidity environment with plenty of sunlight. It likes sandy soil, dislikes waterlogging, and is drought-tolerant.
Lotus bamboo cultivation methods and precautions, an introduction to lotus bamboo
Lotus bamboo is a species under the genus Dracaena in the Asparagaceae family. Lotus bamboo is suitable for water culture, potting and hydroponics. It has extremely high ornamental value and is one of the few greenery and decorative items that can be placed indoors for a long time.
The optimum growth temperature for lotus bamboo is 25-30 degrees, and the nighttime temperature in winter is best not lower than 8 degrees. Lotus bamboo combines "blooming flowers bring wealth" and "bamboo brings peace", making it the best gift for a sweetheart or a friend.
Lotus bamboo has extremely strong adaptability and can grow well in full light, partial light and shade. It likes a high-temperature, high-humidity environment with plenty of sunlight. It likes sandy soil, dislikes waterlogging, and is drought-tolerant.
Morphological characteristics of lotus bamboo
Lotus bamboo has emerald-green leaves and straight stems that are round like bamboo. The leaves are ovate with pointed tips, and the base of the petiole clasps the stem. It is an extremely shade-tolerant plant and still grows well, upright and strong, under weak light conditions. It can be placed indoors for a long time for its foliage and does not need special care; as long as there is enough water, it will grow vigorously.
When growing lotus bamboo hydroponically, cut the bamboo stems into small sections of more than 20 cm as cuttings and insert them in water. As long as 1/3 of the cutting can be immersed in water, it can take root and survive.
Ecological habits of lotus bamboo
The growth temperature for lotus bamboo is 25-30 degrees, and the nighttime temperature in winter should not be lower than 8 degrees.
Lotus bamboo is a plant that likes warmth, humidity and diffused light. It is most suitable for shady, moist, well-drained sandy loam. It fears waterlogging, and its optimum growth temperature is 22-30°C. If the leaves turn yellow and gradually fall off, it may be due to too strong light or insufficient watering.
Lotus bamboo is a vigorous grower, mostly cultivated in gardens and nurseries; there are also wild forms. It likes shade and moisture, has thick stems and leaves, and deep green leaves. It is mainly used as an ornamental plant, with upright stems and dark green leaves, evergreen in winter and summer.
Lotus bamboo cultivation techniques: soil culture
Lotus bamboo likes shade, moisture and high temperatures, is tolerant of waterlogging and strong fertility, and has strong cold resistance; it likes a semi-shaded environment. It is suitable for growing in well-drained sandy soil or semi-muddy sand and alluvial clay, with a suitable growth temperature of 20-28°C. It can tolerate low temperatures of 2-3°C, but in winter it needs protection from frost. The high-temperature, high-humidity seasons of summer and autumn are very favorable for the growth of lotus bamboo, and this is its best growing period. It is not strict about light and is suitable for growing under bright diffused light; too strong light or exposure to the sun can cause leaves to turn yellow, fade and grow slowly.
Therefore, when planting in the field, a shade shed with a shade net 1.7-1.8 m high should be built, with a 75% shading rate being appropriate, to create a semi-shaded, diffused-light environment. Especially from April to September, avoid direct strong light, exposure to the sun or excessive drought, otherwise the leaf surface is likely to become rough and scorched, the growth weak, and the leaves lack luster, reducing ornamental value. During the growing season, the soil should be kept moist often, and water should frequently be sprayed or sprinkled on the leaves to increase air humidity; after heavy rain, the field should be drained of standing water to prevent lodging. In winter, pay attention to cold and frost protection; at temperatures below 10°C the leaves will turn yellow and wilt. At this time, the soil should be kept alternately dry and moist, but it should not be too dry or too wet, and watering should be reduced and fertilizing stopped.
Lotus bamboo has strong growth vigor and strong root and bud sprouting ability, and is often propagated by cuttings; as long as the temperature is suitable, this can be done throughout the year. Generally, stem sections without leaves are cut as cuttings, 5-10 cm long, preferably with 3 internodes, and inserted into a sand bed or semi-muddy sandy soil. In the south, in spring and autumn, roots and buds generally sprout in 25-30 days, and in 35 days they can be potted or transplanted to the field for growing.
Hydroponics
Water cuttings can also take root, and soilless cultivation can also be carried out. In various places in Guangdong in recent years, top shoot branches (that is, tender stems) have been cut into sandy loam or semi-muddy sand or alluvial clay fields, and after careful tending and planting they can be cut for bottle use by the Spring Festival of the same year. In areas south of Guangzhou, such as farmers in Haiyan Town, Taishan City, they are directly inserted into the field in spring and autumn; alternatively, in October-December, top shoot branches or internodal top shoots or lateral bud top shoots can be cut into 15-20 cm cuttings and inserted into coarse sand or semi-muddy sandy fields, buried 2 nodes into the soil, watered once a day, and kept moist; they generally take root in 35-45 days.
Spring cuttings are best taken from late January (after Major Cold) to mid-to-late February (around Rain Water), and can be directly inserted into the field in the open ground, generally taking root in 30-35 days. They can also be taken from mid-March to early April (Spring Equinox to Qingming); it is best to plant in late March, because during this period the temperature gradually rises and the humidity is suitable, and after insertion they can take root in about 7-15 days, with a 100% survival rate, and with good management they can be marketed the same year.
Bottle insertion
Cut off the long branches of lotus bamboo and insert them directly into an elegant vase (with soil put in the vase for fixing and as fertilizer); after they grow they can also be bent into shapes.
Shading
Building a shade shed means covering with a shade net; wooden posts or cement piles are used to build a frame around the paddy field. The wooden posts are required to be 2.4 m high and buried 0.4 m deep. If calculated at four wooden posts (or cement posts) per 20 sq m, about 30-35 wooden posts are needed per mu, and the top of the shed is tied tightly with iron wire or nylon rope. Then, at 10 bundles of plastic shade net per mu (1.5 m wide/100 m, 55 yuan per bundle), cover for shade, and tie it all around with nylon rope, and it is done.
Reasonable close planting
When preparing the land, the bed height is 15-20 cm, the bed width is 120-150 cm, and the bed ditch is 25 cm. Apply 30 loads of decomposed farmyard manure per mu, level it thoroughly, then insert the seedlings. The planting spacing is 8×5 cun or 6×5 cun, and more than 15,000-20,000 plants can be planted per mu. Generally, planting should not be too dense, and the planting depth is best at 2.5-3.5 cm (that is, with 4 node positions on the seedling, inserting 2 node positions is enough), maintaining appropriate space to allow ventilation and light penetration.
Scientific fertilization
Lotus bamboo can grow on sloping land and semi-dry paddy fields. To accelerate its growth, shorten the production cycle and improve economic returns:
1. Apply sufficient base fertilizer: When inserting, apply Jinzhi Yuye (rich in nitrogen, phosphorus, potassium, calcium, magnesium, iron, zinc, copper, etc.) as a base fertilizer, then insert.
2. Apply seedling fertilizer appropriately: 20 days after planting, the plant begins to send out new roots; you can drench once with 30-40 loads of manure water per mu. After 30-40 days, depending on the growth of the seedlings, apply a seedling-promoting fertilizer once, generally mainly compound fertilizer, at 15-20 kg of compound fertilizer per mu, and earth up after application. When the plant grows to 35-45 cm high, its nutrient needs also increase, and this is the stage when the plant begins to grow vigorously. Therefore, at this stage the topdressing should be heavy: 25-30 kg of compound fertilizer per mu and 10-15 kg of urea are appropriate. At the same time, foliar fertilizer can be sprayed, using plant growth regulators such as Xinzhi Su or Pen Shi Bao, to promote balanced growth, lush leaves and thick stems, and improve stress resistance.
Key points for bottle insertion
1. Remove leaves from the base and cut at a slant: Before putting into the vase, remove the leaves from the base of the cutting, and use a sharp knife to cut the base into a slanted opening; the cut should be smooth to increase the area for absorbing water and nutrients. Change the clean water once every 3 to 4 days, and a few small pieces of charcoal can be added to prevent rot. Do not move the position or change the direction within 10 days, and in about 15 days silvery-white fibrous roots will grow.
2. Change water to adding water: After rooting, it is not advisable to change the water; after the water evaporates, only add water in time. Frequent water changes easily cause leaves to yellow and branches to wilt. The water added is best well water; if using tap water, store it in a container for a day first. The water should be kept clean and fresh; do not use dirty water, hard water or water mixed with oil, otherwise the roots will easily rot.
3. Fertilize in time: To prevent leggy growth in water-grown lotus bamboo, do not apply chemical fertilizer. It is best to inject a few drops of brandy into the bottle about every 3 weeks and add a small amount of nutrient solution; alternatively, dissolve half a tablet of aspirin crushed into powder or one tablet of VC in 500 g of water, and drip a few drops in when adding water, which can keep the leaves emerald green (no need once roots have grown).
4. Avoid wind: Do not place lotus bamboo next to a TV or in places constantly blown by an air conditioner or electric fan, to avoid the leaf tips and leaf edges drying up.
Cultivation methods
In northern China, the growing season for lotus bamboo is from April to October. The potting soil should be kept moist, and a humic acid liquid fertilizer applied once every half month. In summer, when maintained outdoors, it should be shaded; too strong light will cause the leaves to turn yellow, so placing it on a north-facing balcony or under light shade is better. When the climate is dry, sprinkle water on the ground and leaves 1 to 2 times a day. From November to March of the following year, it should be maintained indoors, placed in front of a south-facing window where sunlight can be seen; keeping it above 10°C allows slow growth. In spring, from March to April, repot and change the soil; the potting mix can be made from peat soil plus 50% garden soil. First place 2 cm to 3 cm of ceramsite or coarse gravel at the bottom of the pot as a drainage layer, then add the potting soil. After planting, keep the potting soil slightly moist, and once new buds emerge, normal water and fertilizer management can be carried out. After about two years of cultivation, the stems should be cut back and replanted; the plant can be cut back leaving 5 to 6 nodes, and the cut-off parts can be used for cuttings or water culture.
The tied and shaped "lucky bamboo" is mostly grown in water. On ordinary days it should be placed in a bright place indoors. When the temperature is relatively low, change the water once every 7 to 10 days; in the peak growing seasons of spring and autumn, change the water once every 3 to 5 days, and a complete-element compound fertilizer can be added to the water. In the high-temperature period of summer, it is best to use cooled boiled water for water culture, to avoid root rot or the breeding of algae. Stop fertilizing in winter. In severe cold seasons in the north, water culture in rooms without heating facilities is prone to freeze damage; you can plant it in river sand in early October, and when it is cold, cover the pot with a plastic bag, place it indoors where cold wind cannot reach, and it can safely overwinter at around 5°C.
In spring, it can be potted in potting soil or, after washing off the river sand, grown in water. During maintenance, if there are rotten stems or roots, they should be removed promptly, and soaked in a 1000-fold aqueous solution of 75% chlorothalonil for 30 minutes, then rinsed with clean water and continued in water culture. If the plant is already very weak, it should be planted in soil to restore vigor.
Water-grown lotus bamboo likes rotten water; after rooting it should not be changed, and after the water evaporates and decreases, only add water in time. Frequent water changes easily cause leaves to yellow and branches to wilt. To prevent leggy growth, do not apply chemical fertilizer. It is best to inject a few drops of brandy into the bottle about every 3 weeks and add a small amount of nutrient solution, which can keep the leaves emerald green.
After soil-grown plants take root, apply a small amount of compound chemical fertilizer in time, and the branches will grow thick and the leaves oily green. In spring and autumn, apply compound fertilizer once a month.
Propagation tips
In spring, cut the cut-off stems into 5 cm to 10 cm leafless stem nodes, or cut off the base tip which easily dries up. For branches with stem tips that have partly grown in long-term indoor shade, insert them into clean coarse river sand, water thoroughly, cover with a plastic bag, keep the medium moist, and place in a bright place indoors; they can take root in about 25 days. Or insert the cut branches into water; at 25°C they can take root in about half a month.
Steps for water insertion and water culture
1. At the very beginning of growing, cut off the leaves at the bottom to prevent them from inhibiting the bamboo's own growth. The specifics depend on the size and length of the bottle; be careful to cut off the leaves below the bottle mouth. Also, cut off a small section at the base of the root at a slant, and make sure the cut is smooth, so that the elegant bamboo can absorb water better.
2. Control the water volume and choose water selectively; the water volume only needs to account for about one-third to two-thirds of the bottle. Also, before roots grow, change the water frequently, once every 3-4 days; after rooting, you can almost stop changing the water and just add an appropriate amount of water to the bottle. In summer and other dry weather, spray more water on the leaves.
3. Grasp the indoor water-culture temperature for lotus bamboo well, because lotus bamboo prefers warmth, with 16 degrees to 25 degrees being moderate. It is not suitable to place it in a cold place for growing, and freeze protection measures should be taken.
4. Give lotus bamboo enough lighting time; even when grown indoors, it should be moderately exposed to sunlight, and placing it in a ventilated, well-lit place is enough.
5. Depending on the actual situation, fertilize about once every 30 days on average. Moderate fertilization can keep its leaves oily green and spread out for a long time, or adding an appropriate amount of culture solution will also do.
Lotus bamboo cultivation methods: key points of hydroponics
It is very suitable for indoor water-grown flowers. Lotus bamboo has emerald-green leaves and straight stems that are round like bamboo. The leaves are ovate with pointed tips, and the base of the petiole clasps the stem. It is an extremely shade-tolerant plant and still grows well, upright and strong, under weak light conditions.
It can be placed indoors for a long time for its foliage and does not need special care; as long as there is enough water, it will grow vigorously. When growing hydroponically, cut the lotus bamboo stems into small sections of more than 20 cm as cuttings and insert them in water. As long as 1/3 of the cutting can be immersed in water, it can take root and survive.
Watering
During the peak growing period from May to September, water more to keep the soil moist; better wet than dry, but it must not waterlog, otherwise the roots easily rot. During high-temperature periods, leaves and the ground should also often be sprayed with water to increase air humidity, and in autumn and winter the amount of watering should be appropriately reduced.
Fertilizing
During the growing period, apply liquid fertilizer 1-2 times a month to lotus bamboo, which can promote deep green, verdant leaf color; stop fertilizing in winter.
Lotus bamboo has extremely strong adaptability and can grow well in full light, partial light and shade. It likes a high-temperature, high-humidity environment with plenty of sunlight. It likes sandy soil, dislikes waterlogging, and is drought-tolerant.
Causes of yellow leaves
There are many causes of yellow leaves in lotus bamboo, which can basically be divided into the following types:
1. Scorch yellowing
Strong direct sunlight shining on lotus bamboo easily causes the leaf tips and leaf edges of the plant to dry up, and yellow spots appear on the sun-facing parts of the leaves. Moving it to a shaded place is enough.
2. Light-deficiency yellowing
When placed in a shaded environment for a long time, the leaves cannot get enough sunlight and cannot form chlorophyll; the whole plant's leaves turn yellow and then fall off. Supplementing light can avoid this problem.
3. Fertilizer yellowing
Yellowing of lotus bamboo caused by too much fertilizer or too high a concentration shows as dry brown tips on new leaves; generally the leaf surface is thick and lacks luster, and is uneven and not spread out, while old leaves scorch yellow and fall off. Fertilizing should be stopped immediately, and in severe cases a large amount of clean water should be used to wash out part of the fertilizer.
4. Nutrient-deficiency yellowing
It shows as the color of young leaves becoming lighter, turning yellow or pale green, while older leaves remain relatively normal or gradually turn from green to yellow. Usually apply light fertilizer frequently and add some alum water at the right time. (Lotus bamboo is a foliage plant, so fertilizer mainly based on nitrogen should be applied.)
Lotus bamboo disease control
Lotus bamboo commonly suffers from leaf spot, stem rot and root rot. It can be sprayed several times with a 100-fold Bordeaux mixture. Common pests of lotus bamboo include thrips and scale insects; spray with a 1000-fold dilution of 50% omethoate emulsifiable concentrate.
Anthracnose
It is a common disease with a relatively widespread occurrence, and it is a serious disease affecting the lotus bamboo (Dracaena sanderiana) in southern China. Because of the high temperatures last winter and this spring and the long period of drought, the early-planted lotus bamboo in Zhanjiang, Guangzhou, Taishan and other areas of Guangdong has already grown luxuriantly. According to many flower growers, the tips and blades of many lotus bamboo leaves have dried up and withered, and the damage has kept spreading and extending to the upper leaves; because of the long period of drought and high temperatures, the arrival of rainfall led to an outbreak of the disease. It was diagnosed as an epidemic of lotus bamboo anthracnose, and it broke out ahead of schedule in mid-March.
[Symptoms] The disease initially mostly occurs on leaf tips, leaf margins and leaf blades. In the early stage, the diseased part shows water-soaked, dark green irregular lesions, and gradually spreads and enlarges toward the upper leaves; in the middle stage, the lesions are semicircular to irregular in shape, with dark brown edges and clearly defined boundaries; in the late stage, the outer edge of the leaf lesion has a yellow halo, and the center of the lesion is grayish brown or grayish white to yellowish brown. The concentric rings on the lesion surface are obvious or not obvious, and small black spots appear on the lesions, and the leaves gradually turn yellow and die. Once the lesions spread and extend to the leaf blades, young leaf buds, main stem and the base of the leaf stems, when the disease is severe, the stems and leaves will quickly wilt and die. Under weather conditions of continuous rain and abundant fog and dew, the diseased leaves spread, the plants grow poorly, and the effect of foliage viewing is seriously affected.
[Control methods] Strengthen the care and management of lotus bamboo, and it should not be planted too densely; take care to avoid freeze damage and frost damage; irrigate with moisture, fertilize reasonably, and apply more phosphorus and potassium fertilizer to promote growth and improve disease resistance. In winter and spring, cut off diseased leaves and clear away dead leaves, and burn them in a centralized manner to reduce the incidence of the disease, and spread quicklime once to sterilize and disinfect the soil; or spray once with 50% compound carbendazim 500 times solution to prevent the disease, which gives a relatively good preventive effect. Improve the permeability of the field or garden, and in open-field cultivation pay attention to ditching after rain to drain stagnant water, reduce field humidity, and avoid over-application of nitrogen fertilizer. During the growing period, set up shade nets to reduce exposure to high temperatures and strong light. Promptly kill spiders, longhorn beetles, leaf mites, scale insects, etc., to reduce transmission vectors.
When diseased plants are found, spray promptly to control the disease. In the early stage of the disease, alternately spray 75% chlorothalonil + 70% thiophanate-methyl wettable powder (1:1) 600-800 times solution, or 50% compound thiophanate 800 times solution or 50% Kasumin wettable powder 600-800 times solution, or 12.5% emulsifiable concentrate anthracnose-removal 1000-1500 times solution, 25% Tanterling wettable powder 500 times solution, or 50% anthracnose Fumei wettable powder 500 times solution, 50% Shibaogong wettable powder 1000 times solution, or 75% chlorothalonil + 70% Daigaole (1:1) 1000-1200 times solution, with good control effects. The above agents should be used alternately, once every 7 days, for 3-4 consecutive sprays. Generally, spraying quickly before or after heavy rain gives better control by controlling the production of spores and the spread and infection of conidia by the pathogen.
Leaf spot disease
[Symptoms] It occurs on the leaf blades. In the early stage, the lesions are brown spots with yellow edges; after expansion, the lesions are nearly round, gray inside, with dark brown edges and yellow surroundings, and under humid conditions black granular material appears on the lesions.
[Causes] It is a fungal disease. The pathogen survives on diseased plant residues and spreads by air currents, insects, etc., and can directly infect and cause damage through the leaf stomata. In a greenhouse environment, it is prone to occur year-round; under humid conditions, the disease is severe.
[Control methods] During the care period, control the planting density, and maintain ventilation and light transmission. In the early stage of the disease, spray fungicides such as Ribangkegjun and phosethyl-Al manganese zinc.
Stem rot
This disease causes the death of lotus bamboo and reduces its ornamental value. It occurs more often under high temperature and high humidity from May to September, and mainly damages the leaves and stems.
Symptoms: the leaves at the base of the stem of the seedlings turn yellow; the stem base rots, turns yellow and softens; the inside of the stem turns red; the pathogen gradually damages upward from the lower cut.
[Control methods]
(1) Cultivate robust seedlings with well-filled tissue; remove diseased plants and burn them in a centralized manner; dig deep drainage ditches and plant on raised beds 25 cm high.
(2) Soak the lower cut of the seedlings for 24 hours with 42% Kejunjing powder 3000 times solution, or 88% oxytetracycline 1000 times solution.
Variety classification of lotus bamboo
Lotus bamboo mainly includes four types: green-leaf lotus bamboo, golden-edged lotus bamboo, silver-edged lotus bamboo, and the newly emerging lotus bamboo. Because people favor green-leaf lotus bamboo, what we usually call lotus bamboo specifically refers to green-leaf lotus bamboo.
Lotus bamboo, originally named Dracaena sanderiana, is a tropical evergreen foliage plant native to the western islands of the Indian Ocean and the tropical regions of Asia and Africa. It was introduced to mainland China in the early 1980s, began to be planted in large quantities in the early 1990s, and has now become a major cash crop in the coastal areas of southern China.
Distribution areas of lotus bamboo
Lotus bamboo is widely distributed in China and is commonly used as an indoor ornamental plant for the home.
Lotus bamboo is native to western Africa, and it is also distributed in Guangdong, Guangxi, Fujian, Taiwan, China, Anhui, Hubei, Hunan, Shaanxi, Sichuan, Yunnan, Guizhou and Xizang in China, as well as in Thailand and India.
Uses of lotus bamboo: home decoration
Lotus bamboo is suitable for water culture, potting and hydroponics. It has extremely high ornamental value and is one of the few greenery and decorative items that can be placed indoors for a long time. The lotus bamboo plant is short and small, suitable for home greenery decoration, arranged on windowsills, balconies and desks, and can also be used as row decorations in halls, and used as a cut flower accessory.
Placement locations: homes, restaurants, hotels, offices.
Air purification
Lotus bamboo can absorb harmful gases such as ammonia, acetone, benzene, trichloroethylene and formaldehyde, and its distinctive plant shape placed on an office desk has the effect of relieving eye fatigue.
The flower language of lotus bamboo
The flower language of lotus bamboo: wealth and good fortune, rising step by step, and lasting youth.
Lotus bamboo has extremely high ornamental value and is one of the few greenery and decorative items that can be placed indoors for a long time. Lotus bamboo combines "blooming flowers bring wealth" and "bamboo brings peace", and is the best gift for a beauty and friends. Lotus bamboo is suitable for water culture, potting and hydroponics.
Lotus bamboo pictures