What to do with the growing insects of Pearl Plum? pest control of Pearl Plum / 2 insect pests 2 diseases

When people cultivate pearl plum, the last thing they want to encounter is diseases and insect pests. This phenomenon is very harmful to pearl plum. It not only affects the ornamental property, but also causes the plant to die if it is not treated for a long time. What about pearl plum worms? What do you need to do to prevent and control insect pests in Pearl plum? The following small series takes everyone to understand.

1. What about pearl plum worms?

If you want to know what to do with the pearl plum long worm, first of all, we need to know what kind of insect is growing, so that we can deal with it pertinently, because the treatment methods of each kind of diseases and insect pests are different. The details are believed to be introduced in the following pearl plum pest control column, let's take a look at it.

II. Disease and pest control of Pearl Plum

Insect pest

1. Beetle

The beetle is a kind of soil-dwelling pest, which is a common pest among the diseases and insect pests of Pearl Plum. This pest mainly feeds on the main root and stem of Pearl Plum, and it will gradually encroach on the bottom of the plant, resulting in incomplete plant and death.

Control method: when dealing with this pest, we can spray 40% omethoate 1000 times solution on the soil, and then loosen the topsoil after spraying, so that the solution can penetrate better. the beetle will die when touched.

two。 Wax cicada

Among the diseases and insect pests of Pearl Plum, the wax cicada is a very harmful pest. It pays attention to feed on the juice of the plant, which will gradually ingest it, resulting in a large loss of plant nutrients, resulting in shrinkage and rupture, and finally lead to the gradual death of the plant.

Control methods: the reproductive capacity of this pest is very strong, so we must deal with it in time. Generally, we can use 1000 times liquid of trichlorfon to directly spray it.

Disease

1. Leaf spot disease

Among the diseases and insect pests of Pearl Plum, there are many brown disease spots on the leaves and many moldy objects on the back of the leaves, which will spread gradually with the passage of the event, resulting in the death of the plant.

Prevention and control methods: in the prevention and control of leaf spot disease, we can use 50% topiramate 500 times 800 times dilution to spray Pearl Plum, usually once every 10-15 days, and can be basically cured after 2-4 times.

two。 Powdery mildew

Powdery mildew is a disease caused by fungi. When this disease occurs, there will be many dusty white mildew spots on Pearl Plum. This phenomenon will affect the photosynthesis of Pearl Plum, which will gradually lead to leaf shedding and plant wilt. This shows the harmfulness of powdery mildew among the diseases and insect pests of Pearl Plum.

Prevention and control methods: in the prevention and control of powdery mildew, we can use 50% Dysenamine 800-1000 times liquid to spray Pearl Plum, usually spray once every 7-10 days, and then recover after 2-3 times.

Sorbaria sorbifolia (L.) A. Br. Pearl plum photo guide: how to raise pearl plum / how to reproduce pearl plum business card Sorbaria sorbifolia (L.) A. Br. Introduction of Pearl Plum Culture methods and matters needing attention Pearl Plum is native to northern Asia and is distributed in Hebei, Gansu, Shandong, Shanxi, Inner Mongolia, Jiangsu and other places in China. It is a kind of shrub and deciduous broad-leaved shrub with strong shade tolerance, cold tolerance, moisture tolerance and drought tolerance. If the soil is not strict, it can grow normally in ordinary soil, but it grows stronger in moist and fertile soil. Fast growth, strong sprouting ability and resistance to pruning. Spray snowflakes belong to the genus Prunus of Rosaceae. It is so named because of its dense and snow-white flowers when it blossoms. Also because of its leaves like willow leaves, flowers as white as snow, also known as "snow willow". Pearl plum is mostly planted in the garden courtyard, generally do not need to fertilize, but must be often irrigated, especially in spring and summer drought to keep the soil moist. Adequate winter water should be given before the beginning of winter, and overwintering should be protected in high and cold areas, and other management is more extensive. Pearl plum has plump bushes and beautiful branches and leaves, which bloom elegantly white flowers and have a long flowering period in the summer when there are no flowers. In particular, it can kill or inhibit a variety of harmful bacteria, so it is suitable to be planted in all kinds of garden and green space. In particular, it has the characteristics of shade tolerance, so it is a flower and shrub species for greening on the north side of tall buildings and all kinds of buildings in northern cities. The morphological characteristics of Pearl Plum are shrubs, up to 2 meters high, with branches spreading; branchlets cylindrical, slightly bent, glabrous or slightly pubescent, green at first, dark reddish brown or dark yellowish brown when old; winter buds ovate, apex obtuse, glabrous or apical puberulent, purple-brown, with several exserted scales. Pinnately compound leaves, 11-17 leaflets, petioles 13-23 cm long and 10-13 cm wide, leaf rachis slightly pubescent Leaflets opposite, 2-2.5 cm apart, lanceolate to ovate-lanceolate, 5-7 cm long, 1.8-2.5 cm wide, apex acuminate, sparse tail tip, base subrounded or broadly cuneate, sparsely oblique, margin acutely doubly serrate, upper and lower surfaces glabrous or nearly glabrous, pinnately reticulate venation, with lateral veins 12-16 pairs, conspicuous below; leaflets sessile or nearly sessile. Stipules qualitative, ovate-lanceolate to triangular-lanceolate, apex acuminate to acute, margin irregularly serrate or entire, 8-13 mm long, 5-8 mm wide, outside minutely pubescent. Terminal large dense panicle, branches suberect, 10-20 cm long, 5-12 cm in diameter, total pedicel and pedicel stellate hairy or pubescent, gradually deciduous in fruit, nearly glabrous; bracts ovate-lanceolate to linear-lanceolate, 5-10 mm long, 3-5 mm wide, apex long acuminate, entire or shallowly toothed, upper and lower surfaces puberulent, gradually deciduous in fruit; pedicel 5-8 mm long. Flowers 10-12 mm in diam.; calyx tube campanulate, outside base puberulent; sepals triangular-ovate, apex obtuse or acute, sepals ca. as long as calyx tube; petals oblong or Obovate, 5-7 mm long, 3-5 mm wide, white; stamens 40-50, ca. 1.5-2 times longer than petals, born at margin of disk; carpels 5, glabrous or slightly pilose. Follicles oblong, with terminal curved style, ca. 3 mm, fruiting pedicel erect; sepals persistent, reflexed, sparsely spreading. The flowering period is from July to August and the fruiting period is September. The ecological habits of Pearl Plum; Pearl plum is resistant to cold, half shade and pruning. It grows better in sandy loam with good drainage. It grows fast and is easy to sprout. It is a good flowering plant in summer. There are many positive plants in Rosaceae, and spraying snow is no exception. It likes the sun and is resistant to a certain water and wet environment, but it is not suitable to accumulate water for a long time. The cultivation technique of Pearl Plum has strong adaptability and low requirement for fertilizer. Except for a small amount of base fertilizer for newly planted plants, it does not need rotating fertilizer, but it needs watering. Generally, it is watered 3 times from leaf bud germination to flowering, and the Beginning of Autumn is watered 2 times after frost and 3 times before frost, including 1 times of anti-freezing water, depending on drought in summer. Don't water it when it rains a lot. After the flower fade, the inflorescence is withered and yellow, which affects the appearance, so the residual inflorescence should be cut off to make the plant clean and tidy, and avoid the residual inflorescence competing with the plant for nutrients and water. Diseases and insect pests and old and weak branches should also be cut off after autumn or early spring, and annual branches can be strongly pruned to promote the renewal of branches and the flourishing of flowers and leaves. ① is not strict with soil, but it grows better and blossoms more luxuriantly when cultivated in deep and fertile sandy soil. ② does not have high requirements for fertilization. When it is just cultivated, it needs to apply sufficient base fertilizer to meet its growth requirements, and generally no longer apply topdressing. In the future, combined with winter management, base fertilizer can be applied every 1-2 years. ③ should be watered in time when it is dry in spring, thoroughly watered in summer and autumn to keep the soil from drought, and should be watered once before winter. ④ should prune the residual flower branches, disease and insect branches and old and weak branches in time after flowering, so as to keep the plant type neat, avoid nutrient consumption, and promote its robust growth and luxuriant flowers and leaves. The reproduction method of Pearl Plum is mainly divided into plants, and it can also be sown. However, because the seeds are small, the sowing method is not used. Ramet propagation is generally carried out before sprouting in spring or after defoliation in autumn. The sprouting seedlings clustered in the root of the plant were dug out with roots, and 3-5 plants were used as a clump and planted separately. When planting, apply 2-lift compost as base fertilizer, and pour water thoroughly after planting. It can be watered once a week or so until it survives. The clumps of more than 5-year-old plants can grow into a large crown width, and the soil around the old clumps can be planed before sprouting in early spring, and then the surrounding roots and tillers can be excavated from the mother one by one, transferred to the nursery and cultivated in the nursery, and the seedlings can come out of the nursery one year later. The sowing method can be used in mass propagation of seedlings. The seeds are dried and stored and sown in spring the following year. In the process of growth, Pearl Plum is easy to germinate roots and tillers, so it can be propagated in March and April in early spring. The plants with strong growth, no diseases and insect pests and more tillers were selected as the mother plant. The method is to dig up the soil around the root of the mother plant which is more than 5 years old, cut down from the middle of the gap, separate the tiller from the mother plant, and divide 5 to 7 trees per tree. The separated root tiller seedlings should have complete roots, and if the lateral roots of the root tiller seedlings are thin and many, they should be cut off properly when planting. This breeding method has the advantages of high survival rate, quick effect and simple management, but the number of reproduction is limited. After ramet, pour enough water, and move the plant into a slightly shaded place, gradually put in the sun for normal maintenance a week later. The method of cutting propagation is suitable for mass propagation and can be carried out all the year round, but the cuttings in March and October take root the fastest and the survival rate is high. Cutting soil generally uses 5 parts of garden soil, 4 parts of humus soil, 1 part of sandy soil, mixed ditch to make beds, and cuttings in open field. Cuttings should choose current or biennial mature branches on robust plants, cut and grow 15 to 20 centimeters, leaving 4 to 5 buds or leaves. When cutting, cut the cuttings into the soil, leaving only one or two buds or leaves at the top of the soil. Cuttings should be cut flat, cut into horseshoe shape, cut along with cutting, suppress the soil at the base of cuttings, and pour water once. After that, spray water once or twice a day, often keeping the soil moist. Reduce the number of water spraying after 20 days to prevent excessive dampness and cause branch rot, which can take root and transplant in about 1 month. Striping propagation in March and April, the branches on the periphery of the mother plant are bent and pressed directly into the soil, and the parts pressed into the soil can also be circumscribed or scratched to promote rapid rooting. After the new root is grown, it can be separated from the mother plant and transplant in spring and autumn. Disease control of Pearl plum after the plant grows up, it is necessary to carry out the prevention and control of diseases and insect pests in time, and to achieve early control to promote the healthy growth of plants. The main diseases of Pearl Plum are: leaf spot disease, powdery mildew disease, brown spot disease, the main prevention insects are: beetle, spotted leaf wax cicada and so on. When leaf spot disease occurs, round or irregular brown spots will appear on the leaves, and sparse brown mildew on the disease spots on the back of the leaves. Prevention and control method: 50% topiramate 500 × 800 times diluent can be sprayed. When powdery mildew occurs, white or gray flour will be produced on the leaves, and when it is serious, the leaves will be slightly curled, and the leaves will fall off in the early stage. The flowers are small but not blooming, and the flowers are deformed and curled and dry. Control methods: 1, remove the diseased and residual plants in late autumn, reduce the source of bacteria; 2, pay attention to ventilation, reduce air humidity, strengthen light, increase the application of phosphorus and potassium fertilizer, and enhance resistance; 3, after the disease should be cut off in time, or pull out the diseased plants burned; 4, spray. Spray the same amount of 1% Bordeaux solution during dormancy, and spray 70% methyl topiramate 800 times or 50% Dysenamine 800 times 1000 times at the initial stage of the disease. Pearl plum brown spot is mainly harmful leaves, at first scattered brown round to irregular disease spots on the leaf surface, the edge is dark, and the boundary is obvious with healthy tissue, and in the later stage, there are small mildew spots from dark brown to dark brown on the back of the leaves, that is, the pathogen fruiting body. The pathogen overwintered on the injured leaves as mycelia or conidia, and the conidia spread to the neighboring plants by wind and rain the following year, which was easy to occur when the trees were weak or poorly ventilated. Prevention and control methods (1) from July to September, spray 65% zinc wettable powder 600 times or 70% mancozeb wettable powder 500 times, 25% carbendazim 12% green copper EC 600 times (2) strengthen management and improve disease resistance. (3) in late autumn and early winter, diseased leaves were collected and burned to reduce the source of bacteria in the following year. Beetles, Xiaoqing flowers, beetles and other bites eat leaves, buds and flowers, resulting in incomplete leaves. Control methods: 1, making use of the false death of adults, vibrating branches in the early morning or evening; 2, spraying 1000 times of omethoate solution or 1000 times of 50% marathon solution during the occurrence of adults. 3. Making use of the habit of adults entering the soil, 2.5% imidophos powder was sprinkled around the plant, and after application, the topsoil was loosened, so that the adults were poisoned and killed by drug contact. The adults and nymphs of the spotted leaf wax cicada often gather to suck the juice on the back of the tender leaves, and the injured leaves have symptoms such as perforation, rupture, curl or thickening with different leaf ages. Control methods: 1. In winter, excessive dense branches and withered branches should be cut off and burned to reduce insect sources. 2. Insect nets can be used to kill adults in the peak period. 3. 1000 times of trichlorfon or 1200 times of dimethoate emulsion can be used to kill nymphs and adults. Pearl plum is native to China and Japan, and is mainly distributed in Zhejiang, Jiangxi, Yunnan and other provinces. It is distributed in Hebei, Shanxi, Shandong, Henan, Shaanxi, Gansu and Inner Mongolia. Pearl plum is native to northern Asia and is distributed in Hebei, Henan, Shaanxi, Gansu, Shandong, Shanxi and Inner Mongolia. Sex likes sunshine and has strong shade tolerance, cold tolerance, moisture tolerance and drought tolerance. If the soil is not strict, it can grow normally in ordinary soil, but it grows stronger in moist and fertile soil. Common cultivation of garden green space and residential courtyard in northern China. Fast growth, strong sprouting ability and resistance to pruning. Can be used to remove the old branch of the method of alternating between the new and the old, constantly updated and rejuvenated. In the growing season, if not collecting seeds, it is appropriate to cut off the remaining flower branches at any time after flowering, in order to maintain the perfect plant posture. It is also distributed in North China, Northwest China, Soviet Union, Korea, Japan and Mongolia. Liaoning, Jilin, Heilongjiang, Inner Mongolia. Born in sparse forests on hillsides, 250-1500 m above sea level. It is also distributed in the Soviet Union, Korea, Japan and Mongolia. It is distributed in Hebei, Jiangsu, Shanxi, Shandong, Henan, Shaanxi, Gansu and Inner Mongolia. Like light and shade tolerance, cold tolerance, strong sex, no choice of soil. Strong sprouting and resistant to pruning. Growing rapidly. The variety of Pearl Plum is related to the variety classification of Pearl Plum. The variety is also known as Prunus mandshurica (northeast woody plant map) and spike-shaped Seven degree Zao (Botanical Dictionary). Its inflorescence and leaf axis are densely covered with stellate hairs, the back of leaves are sparsely stellate hairy, and the fruit is sparsely pubescent. Prolific Jilin and Heilongjiang. Mostly born in mountain shrubs, 250-300 meters above sea level. Distributed in North Korea. The species closely related to this species is Pearl Plum. Originated in China, the model specimen is collected from the cultivated plants in the Vili Maureen Arboretum in France. According to the literature records, the difference between Pearl Plum and Pearl Plum lies in the lack of stamens (20) and the leaflet with more than 25 pairs of lateral veins. However, the difference between Pearl Plum and Pearl Plum in North China was not pointed out, and no type specimen was found. The dietotherapy or medicinal value of Pearl Plum the medical information and health dietotherapy information of Pearl Plum are for reference only and can not be used as the basis for diagnosis and medical treatment. Any health problems should consult professional health care personnel, the treatment of any disease, please follow the doctor's advice. The ultimate task of protecting flowers: to love yourself, proceed from reality and follow the doctor's advice. For disease, do not be careless, do not postpone, do not give up hope, face it bravely, warm the silent world with love, and protect the inner flower field with your heart. Medicinal value [source] Sorbaria sorbifolia (L.) A. Brown, a plant of the genus Prunus in Rosaceae, is used as medicine in stem bark, branch and ear. Take the outer skin of stems and branches in spring and autumn and dry them in the sun; pick ears in autumn and winter, dry them in the sun and grind the powder. The taste is bitter and cold. poisonous. [functional indications] promoting blood circulation and dispelling blood stasis, reducing swelling and relieving pain. For fracture, fall injury, joint sprain, swelling and pain, rheumatoid arthritis. [12] [usage dosage] 1 gram of stem bark and ear, swallowed by grinding powder; 15 grams of branches, fried in water. Apply appropriate amount of grinding powder for external use and apply to the affected area. [remarks] (1) poisoning has symptoms such as nausea and vomiting. Those who are light take licorice water, and those who are serious take symptomatic treatment. [excerpt] the function and ornamental value of Pearl Plum in the National Compendium of Chinese Herbal Medicine is named for its color like pearl. Pearl plum is elegant in beauty, proud of frost and snow, in the autumn when thousands of flowers wither and wind and sand is serious, only it stands out, becoming a beautiful symbol of strength and courage to struggle with difficulties, and an inspiring partner. In China, there is a tradition of loving, planting and tasting plum, and regard plum as a symbol of integrity. With a height of 4.6 meters and a crown width of 6.5 meters, the flowers bloom in July and August every year, which has become a beautiful and indispensable scenery in people's life. The garden use of Pearl Plum the flowers and leaves of Pearl Plum are beautiful, the flowering period is very long and it is in the season of few flowers in summer, the ornamental tree species which are very popular in garden application can be planted alone, and the effect of cluster planting is very good. Pearl plum is mostly planted in the garden courtyard, generally do not need to fertilize, but must be often irrigated, especially in spring and summer drought to keep the soil moist. Adequate winter water should be given before the beginning of winter, and overwintering should be protected in high and cold areas, and other management is more extensive. Pearl plum has plump bushes and beautiful branches and leaves, which bloom elegantly white flowers and have a long flowering period in the summer when there are no flowers. In particular, it can kill or inhibit a variety of harmful bacteria, so it is suitable to be planted in all kinds of garden and green space. In particular, it has the characteristics of shade tolerance, so it is a flower and shrub species for greening on the north side of tall buildings and all kinds of buildings in northern cities. Pearl plum flower language: friendship, hard work. Pearl plum picture how to raise pearl plum bonsai

Pearl plum, native to northern Asia, is a kind of shrub and deciduous broad-leaved shrub with strong shade tolerance, cold tolerance, moisture tolerance and drought tolerance. Pearl plum is mostly planted in garden courtyard. The following introduces how to raise the bonsai of Pearl Plum and how to raise it in detail.

Introduction of Pearl Plum

Pearl plum is native to northern Asia and is distributed in Hebei, Gansu, Shandong, Shanxi, Inner Mongolia, Jiangsu and other places in China. It is a kind of shrub and deciduous broad-leaved shrub with strong shade tolerance, cold tolerance, moisture tolerance and drought tolerance. If the soil is not strict, it can grow normally in ordinary soil, but it grows stronger in moist and fertile soil. Fast growth, strong sprouting ability and resistance to pruning.

Spray snowflakes belong to the genus Prunus of Rosaceae. It is so named because of its dense and snow-white flowers when it blossoms. Also because of its leaves like willow leaves, flowers as white as snow, also known as "snow willow". Pearl plum is mostly planted in the garden courtyard, generally do not need to fertilize, but must be often irrigated, especially in spring and summer drought to keep the soil moist.

Adequate winter water should be given before the beginning of winter, and overwintering should be protected in high and cold areas, and other management is more extensive. Pearl plum has plump bushes and beautiful branches and leaves, which bloom elegantly white flowers and have a long flowering period in the summer when there are no flowers. In particular, it can kill or inhibit a variety of harmful bacteria, so it is suitable to be planted in all kinds of garden and green space. In particular, it has the characteristics of shade tolerance, so it is a flower and shrub species for greening on the north side of tall buildings and all kinds of buildings in northern cities.

1. Morphological characteristics

Pearl plum is a shrub, up to 2 m tall, branches spreading; branchlets Terete, slightly flexed, glabrous or puberulent, green at first, dark reddish brown or dark yellowish brown when old; winter buds ovate, apex obtuse, glabrous or apical puberulent, purple-brown, with several alternate exserted scales.

Pinnately compound leaves, 11-17 leaflets, petioles 13-23 cm long and 10-13 cm wide, leaf rachis slightly pubescent Leaflets opposite, 2-2.5 cm apart, lanceolate to ovate-lanceolate, 5-7 cm long, 1.8-2.5 cm wide, apex acuminate, sparse tail tip, base subrounded or broadly cuneate, sparsely oblique, margin acutely doubly serrate, upper and lower surfaces glabrous or nearly glabrous, pinnately reticulate venation, with lateral veins 12-16 pairs, conspicuous below; leaflets sessile or nearly sessile. Stipules qualitative, ovate-lanceolate to triangular-lanceolate, apex acuminate to acute, margin irregularly serrate or entire, 8-13 mm long, 5-8 mm wide, outside minutely pubescent.

Terminal large dense panicle, branches suberect, 10-20 cm long, 5-12 cm in diameter, total pedicel and pedicel stellate hairy or pubescent, gradually deciduous in fruit, nearly glabrous; bracts ovate-lanceolate to linear-lanceolate, 5-10 mm long, 3-5 mm wide, apex long acuminate, entire or shallowly toothed, upper and lower surfaces puberulent, gradually deciduous in fruit; pedicel 5-8 mm long. Flowers 10-12 mm in diam.; calyx tube campanulate, outside base puberulent; sepals triangular-ovate, apex obtuse or acute, sepals ca. as long as calyx tube; petals oblong or Obovate, 5-7 mm long, 3-5 mm wide, white; stamens 40-50, ca. 1.5-2 times longer than petals, born at margin of disk; carpels 5, glabrous or slightly pilose.

Follicles oblong, with terminal curved style, ca. 3 mm, fruiting pedicel erect; sepals persistent, reflexed, sparsely spreading. The flowering period is from July to August and the fruiting period is September.

2. Ecological habits

Pearl plum is resistant to cold, half shade and pruning. It grows better in sandy loam with good drainage. It grows fast and is easy to sprout. It is a good flowering plant in summer.

There are many positive plants in Rosaceae, and spraying snow is no exception. It likes the sun and is resistant to a certain water and wet environment, but it is not suitable to accumulate water for a long time. Lax requirements on soil, tolerance to a certain amount of salt and alkali, suitable for growth in Shanghai

The mode of reproduction of Pearl Plum

Pearl plum is mainly propagated by the method of dividing plants, and it can also be sown. However, because the seeds are small, the sowing method is not used. Ramet propagation is generally carried out before sprouting in spring or after defoliation in autumn. The sprouting seedlings clustered in the root of the plant were dug out with roots, and 3-5 plants were used as a clump and planted separately.

When planting, apply 2-lift compost as base fertilizer, and pour water thoroughly after planting. Water can be watered about once a week in the future. Until they survive. The clumps of more than 5-year-old plants can grow into a large crown width, and the soil around the old clumps can be planed before sprouting in early spring, and then the surrounding roots and tillers can be excavated from the mother one by one, transferred to the nursery and cultivated in the nursery, and the seedlings can come out of the nursery one year later. The sowing method can be used in mass propagation of seedlings. The seeds are dried and stored and sown in spring the following year.

1. Ramet propagation

Pearl plum is easy to germinate roots and tillers in the process of growth, so it can be propagated in March and April in early spring. The plants with strong growth, no diseases and insect pests and more tillers were selected as the mother plant.

The method is to dig up the soil around the root of the mother plant which is more than 5 years old, cut down from the middle of the gap, separate the tiller from the mother plant, and divide 5 to 7 trees per tree. The separated root tiller seedlings should have complete roots, and if the lateral roots of the root tiller seedlings are thin and many, they should be cut off properly when planting. This breeding method has the advantages of high survival rate, quick effect and simple management, but the number of reproduction is limited. After ramet, pour enough water, and move the plant into a slightly shaded place, gradually put in the sun for normal maintenance a week later.

2. Cuttage propagation

This method is suitable for mass propagation and can be carried out all the year round, but the cuttings in March and October take root the fastest and the survival rate is high. Cutting soil generally uses 5 parts of garden soil, 4 parts of humus soil, 1 part of sandy soil, mixed ditch to make beds, and cuttings in open field. Cuttings should choose current or biennial mature branches on robust plants, cut and grow 15 to 20 centimeters, leaving 4 to 5 buds or leaves. When cutting, cut the cuttings into the soil, leaving only one or two buds or leaves at the top of the soil. Cuttings should be cut flat, cut into horseshoe shape, cut along with cutting, suppress the soil at the base of cuttings, and pour water once. After that, spray water once or twice a day, often keeping the soil moist. Reduce the number of water spraying after 20 days to prevent excessive dampness and cause branch rot, which can take root and transplant in about 1 month.

3. Striping propagation

In March and April, the branches on the periphery of the mother plant are bent and pressed directly into the soil, and the pressed parts of the soil can also be cut or scratched to promote rapid rooting. After the new root is grown, it can be separated from the mother plant and transplant in spring and autumn.

Culture method of Pearl Plum

Pearl plum has strong adaptability and does not have high requirements for fertilizer. except for a small amount of base fertilizer for newly planted plants, it does not need rotating fertilizer, but it needs watering. Generally, it is watered 2-3 times during the period from leaf bud germination to flowering, and the Beginning of Autumn is watered 2 or 3 times from post-frost to frost, including 1 times of anti-freezing water, watering in summer depending on drought, and no need to water when it rains a lot. After the flower fade, the inflorescence is withered and yellow, which affects the appearance, so the residual inflorescence should be cut off to make the plant clean and tidy, and avoid the residual inflorescence competing with the plant for nutrients and water. Diseases and insect pests and old and weak branches should also be cut off after autumn or early spring, and annual branches can be strongly pruned to promote the renewal of branches and the flourishing of flowers and leaves.

① is not strict with soil, but it grows better and blossoms more luxuriantly when cultivated in deep and fertile sandy soil.

② does not have high requirements for fertilization. When it is just cultivated, it needs to apply sufficient base fertilizer to meet its growth requirements, and generally no longer apply topdressing. In the future, combined with winter management, base fertilizer can be applied every 1-2 years.

③ should be watered in time when it is dry in spring, thoroughly watered in summer and autumn to keep the soil from drought, and should be watered once before winter.

④ should prune the residual flower branches, disease and insect branches and old and weak branches in time after flowering, so as to keep the plant type neat, avoid nutrient consumption, and promote its robust growth and luxuriant flowers and leaves.

How to raise bonsai of pearl plum

The maintenance of pearl plum bonsai is mainly in the details of temperature, watering, basin soil and so on. The maintenance of bonsai pearl plum is not as extensive as ground planting. We should pay attention to whether the potted soil should be watered at any time, and at the same time regularly trim the branches and leaves. Only in this way can the benefits of pearl plum bonsai be shown.

I. Seedling raising methods

1. Cuttage

The cuttage propagation of Pearl Plum should be carried out after defoliation in autumn. The nursery bed can be selected to be sunny and leeward, turn it over deeply and scrape it finely. After making the nursery bed, fill the seedbed with 70 cm thick disinfected plain sand. When cutting, select the strong branches that grow in the same year, each section is about 12 ~ 15 cm long, and spray water after cutting.

Cover with plastic film to keep the substrate moist and the temperature of the seedling bed: Pearl plum has strong regeneration ability, high survival rate, rapid growth and development. It begins to germinate in the early spring of the following year, and pot planting can be carried out in autumn.

two。 Ramet

Pearl plum plants, generally cultivated for 3 years after 5 years, must be cut and planted, the time should be from September to October. When planting separately, dig up the pearl plum with soil mass, remove too much attached soil, and expose all the roots. Then, according to the gap between the roots of the plant, cut into several clusters with a sharp knife, smear sulfur powder on the incision, and then cut off too many stems, branches and long roots properly. And according to the needs of greening and beautification, single plant cultivation was carried out. After planting, pour the water thoroughly, and then irrigate once a week, generally 3 times in a row, Pearl Plum can survive.

2. Culture methods

1. Basin soil

Basin soil should choose good permeability, strong drainage performance, more fertile loam. Organic fertilizer was applied at the end of autumn and early winter, and phosphorus and potassium fertilizer was applied before flowering. Usually appropriate amount of watering, keep the basin soil moist, do not be too wet for a long time, let alone waterlogging. Pot plants should be placed in direct sunlight as far as possible, winter low-temperature dormancy is its physiological needs, can not be put into the greenhouse, so as not to affect the growth and flowering of the next year, placed in the open air, leeward, sunny place or cover the basin soil to cover the winter. Prune every year after falling leaves to before sprouting in the second year, and cut off the weak ones in the diseased, dry and withered branches and overdense branches. Truncate too long branches, so that it maintains a good plant type, ventilation and light, in order to facilitate flowering.

two。 Temperature and light

Pearl plum culture because it likes the warm, humid and sunny environment. Adult plants can also tolerate cold and semi-shade. Autumn cutting seedlings, to the following summer, happens to be the tender shoot and tender leaf growth period, the grower should according to the position of the seedling bed, pay attention to shelter shading to avoid strong direct sunlight, so that it can have scattered light. Flowering and fruit-hanging plants should be exposed to sunlight to make their photosynthesis exuberant and promote the exuberant growth of plants.

The most suitable temperature for the growth of Pearl Plum is 18 ℃ ~ 32 tons. If the temperature is suitable, the light is sufficient, coupled with reasonable water and fertilizer management, Pearl Plum will be able to enter the luxuriant growth period, with pearly buds glowing on the crown. Pearl plum is hardy, and it is not necessary to take any cold prevention measures in winter, so it can survive the winter in the open field.

3. Fertilization

Pearl plum does not have high requirements for fertilization, just the cultivation of the need to apply sufficient base fertilizer, can meet its growth requirements, generally no longer apply topdressing. In the future, combined with winter management, base fertilizer can be applied every 1-2 years.

4. Pruning

The inflorescence of pearl plum blossom is withered and yellow, which affects its appearance, so the residual inflorescence should be cut off to make the plant clean and tidy, and avoid the residual inflorescence competing with the plant for nutrients and water. Diseases and insect pests and old and weak branches should also be cut off after autumn or early spring, and annual branches can be strongly pruned to promote the renewal of branches and the flourishing of flowers and leaves.

5. Watering

It should be watered in time when it is dry in spring and thoroughly when it is dry in summer and autumn in order to keep the soil from drought. It is also necessary to water antifreeze water once before winter.

Disease Control of Pearl Plum

After the plants grow up, the prevention and control of diseases and insect pests should be carried out in time, and early prevention and control should be achieved to promote the healthy growth of plants. The main diseases of Pearl Plum are: leaf spot disease, powdery mildew disease, brown spot disease, the main prevention insects are: beetle, spotted leaf wax cicada and so on.

1. Leaf spot

When the disease occurs, round or irregular brown spots will be produced on the leaves, and sparse brown mildew on the disease spots on the back of the leaves.

Prevention and control method: 50% topiramate 500 × 800 times diluent can be sprayed.

2. Powdery mildew

When the disease occurs, white or gray flour will be produced on the leaves, and when it is serious, the leaves will be slightly curled, and the leaves will fall off in the early stage. The flowers are small but not blooming, and the flowers are deformed and curled and dry.

Prevention and control methods:

(1) to remove the diseased and residual plants and reduce the source of bacteria in late autumn.

(2) pay attention to ventilation, reduce air humidity, strengthen light, increase application of phosphorus and potassium fertilizer, and enhance resistance.

(3) after the onset of the disease, the injured part should be cut off in time, or the diseased plant should be removed and burned.

(4) spraying. Spray the same amount of 1% Bordeaux solution during dormancy, and spray 70% methyl topiramate 800 times or 50% Dysenamine 800 times 1000 times at the initial stage of the disease.

3. Brown spot

Pearl plum brown spot is mainly harmful leaves, at first scattered brown round to irregular disease spots on the leaf surface, the edge is dark, with a clear boundary with healthy tissue, and in the later stage, there are small mildew spots from dark brown to dark brown on the back of the leaves, that is, the pathogenic fungus fruiting body. The pathogen overwintered on the injured leaves as mycelia or conidia, and the conidia spread to the neighboring plants by wind and rain the following year, which was easy to occur when the trees were weak or poorly ventilated.

Prevention and cure method

(1) spraying 65% zinc wettable powder 600 times or 70% mancozeb wettable powder 500 times, 25% carbendazim 12% green copper EC 600 times from July to September.

(2) strengthen the management and improve the disease resistance.

(3) in late autumn and early winter, diseased leaves were collected and burned to reduce the source of bacteria in the following year.

4. Beetles

Small blue and white beetles bite leaves, buds and flowers, resulting in mutilated leaves.

Prevention and control methods:

(1) make use of the false death of adults to vibrate branches in the early morning or evening to kill.

(2) spraying 1000 times of omethoate or 1000 times of 50% marathon during the occurrence of adults.

(3) making use of the habit of adults entering the soil, 2.5% imidophos powder was sprinkled around the plant, and the topsoil was loosened after application, so that the adults were poisoned to death.

5. Spotted leafhopper

Adults and nymphs often gather on the back of tender leaves to suck sap, and the injured leaves have symptoms such as perforation, rupture, curl or thickening with different leaf age.

Prevention and control methods:

(1) in winter, dense branches and dead branches should be cut off and burned to reduce the source of insects.

(2) insect nets can be used to catch and kill adults during the peak period.

(3), nymphs and adults can be sprayed and killed with 1000 times of 90% trichlorfon or 1200 times of 40% dimethoate emulsion.