How to cultivate osmanthus? Propagation Methods and Disease Control of Osmanthus fragrans

Sweet-scented osmanthus is one of the top ten famous flowers in Chinese tradition. It is a cherished aromatic plant and ornamental plant. It is green all the year round, beautiful branches and rich fragrance of flowers. So how to cultivate and manage Osmanthus fragrans? Let's take a look at it with the editor.

Cultivation conditions: sweet-scented osmanthus belongs to temperate plants, sexual like warm and humid environment, not resistant to severe cold, adapted to subtropical climate, the optimum growth temperature is 15-28 ℃; sweet-scented osmanthus belongs to long-day plants, sexual like strong sunlight, can withstand high temperature, suitable for planting in places with plenty of sunshine and good ventilation; sweet-scented osmanthus is moist, afraid of water stains, but also has a certain ability to withstand drought, so pay attention to waterproof and waterproof drainage in rainy season during cultivation. Sweet-scented osmanthus is not strict on soil, it develops well in sandy acid soil and avoids alkali soil. I'm afraid of soot. Generally choose to plant in early spring.

Propagation methods: sowing, striping, grafting and cuttings can be used to propagate.

Sowing seeds

The fruit of sweet-scented osmanthus is ripe from April to May. When the fruit turns purple-blue, the pericarp is removed and the seeds are naturally air-dried and stored in a cool place. It was sown in autumn in October of that year or in spring the following year. The method of strip sowing is generally used for sowing and reproduction. after sowing, the grass is covered to moisturize and set up a shade.

Pressing strip

High-altitude strips are often used. Select the branches of appropriate thickness in spring, cut or peel the flexible parts with a sharp knife, reach to the xylem, wrap the humus soil in plastic sheeting and tie up the cut, keep the soil moist, and cut off the mother plant for planting after taking root in autumn.

Grafting

More docking or cutting can be done. Osmanthus fragrans seedlings, and privet, lobular privet, fringed trees, etc. are often selected as rootstocks, with high survival rate and fast growth of grafted seedlings. Cutting and grafting was carried out before sprouting and budding in spring, and grafting was mostly carried out from summer to before falling, and scions and rootstocks with similar branch thickness were selected. There are more cuts in the south and more in the north.

Cuttings

Before the spring plant germinates, select 1-year-old strong branches, cut into 5-10 cm cuttings, cut off the lower leaves, keep 2-3 green leaves in the upper part, insert them into sand or peat, cover them with plastic film, put them in a shaded place, keep the temperature at 20 to 25 degrees, and then the Beginning of Autumn can take root and transplant. It is also possible to cut the current year's branches after the new shoots stop growing in summer, and the method is the same as above.

Disease prevention and cure

Brown spot is mainly harmful to leaves. Round or near round brown spots with a diameter of 2 to 10mm appear after damage. Brown spot usually occurs from April to October. Old leaves are more susceptible than young leaves, causing a large number of scorched leaves. Prevention and control methods: 1. When the disease is about to occur, spray 65% Dyson zinc wettable powder 400 to 600 times or 50% benzoate wettable powder 1000 to 1500 times every 7 to 10 days, 2 to 3 times in a row. Strengthen the management of water and fertilizer, increase the application of potash fertilizer, pay attention to ventilation and light transmission, and improve plant disease resistance; 3. Spray 50% carbendazim 500-800 times or 75% chlorothalonil 600-800 times at the initial stage of the disease; 4. Clean up the diseased branches in time.

Blight spot disease: generally occurs from July to November, the initial onset of the disease from the leaf edge, leaf tip invasion, the leaf produced light brown spots, and then gradually expanded into a near round or irregular brown spot, the edge is dark brown. Prevention and control methods: 1. In winter, thoroughly remove diseased leaves and burn them or bury them deeply to reduce overwintering pathogens. Spray 70% mancozeb wettable powder 500 times liquid, leaf library 800 times liquid.

Black-winged whitefly: adults and larvae cluster on the back of the leaves to suck juice and form maculae, causing leaves to turn yellow, wilt, and even die. In severe cases, they secrete a lot of honey, which is easy to induce soot disease and blacken branches and leaves. Control methods: it is found that pests are immediately sprayed with 2.5% bromocyanogen polyester or abamectin (7051) insecticide 2000 times, Emile 30000 times or Aktai 10000 times, and so on.

Propagation methods and pest control of potted cinnamon with silver edge

How to plant silver-edged cinnamon? The editor of Huinong Network introduced the main points one by one from the aspects of breeding methods, grafting techniques, daily management, pest control and so on.

1 reproduction

Silver-edged cinnamon can be propagated by cutting, grafting, striping and other methods. However, in the production, the survival rate of striping is relatively low, while the survival rate of cutting and grafting is high and easy to operate, so it is suitable for large-scale cultivation and is widely used in practical production.

1.1 Cuttage propagation

Cutting propagation can be divided into soil cutting propagation and soilless cutting propagation, the two cutting media are different, but the techniques and operation methods are basically the same.

① cutting time. It is more than from June to July every year, and when the soil temperature is 20 ℃ ~ 25 ℃, it is beneficial to rooting and promoting survival. Some places can also be carried out in autumn. The specific time can be determined according to local production habits.

② cutting medium. Silver-edged cassia prefers slightly acidic soil and grows poorly in alkaline or neutral soil. When cutting, it is necessary to choose red loam soil rich in trace elements or humus sandy soil, or loess with no impurities, muddy quality and good permeability. Peat and perlite are the main substrates for soilless propagation. Before cutting, the two were evenly mixed and stirred according to the ratio of 1 ∶ 1.

③ harvesting and cuttings treatment. The female parent plant should be disinfected and sterilized 2-3 days before taking branches. It is necessary to choose current year's semi-lignified branches with strong growth, good development, no diseases and insect pests, no withered branches and yellow leaves, and adequate nutrition as cuttings. Branches are too young to rot, but too old to take root. It is best to pick branches on cloudy or dewy mornings. Cut cuttings should be placed in clean plastic pots or bags to avoid bright light. Cuttings should be cut and cut whenever they are cut, usually with two leaves. After cutting the cuttings, soak them in 100mg/L 's naphthalene acetic acid for 3 seconds, dry them and then cut them.

1.2 Cuttage propagation in seedbed

① ready to plug in the bed. Flat land is selected for bed insertion, and the soil quality is mostly sandy loam or acid red loam. First plough the land deeply and remove the weeds. A 1m wide nursery bed is formed on the ground with iron board or wooden board, and the length is self-defined. Open the drains between the seedbeds. The drainage ditch should be divided into wide and narrow ditches, wide ditches for drainage, and narrow ditches for field operations in production. Pour the red loam into the seedbed and flatten it with a hoe. The height of the seedbed is 8~10cm. Disinfect the soil with potassium permanganate one week before cutting. Sprinkle the seedbed with water before cutting and wait for the water to permeate before cutting.

② cutting method. Put the prepared cuttings on both sides of the seedbed and at least two people on both sides. The cuttings should be neat, the depth should be able to cover the petiole and the density should be slightly overlapped. After cutting, pour enough water to fix the root, 1000 plants can be cut per square meter.

1.3 soilless cutting propagation

Soilless cutting propagation was carried out more than 5 ~ 6 months. First put the soilless matrix into a 72-hole hole plate, then spray it with water, and wait for water to penetrate before cutting. The method of cutting is the same as that of soil cutting. After cutting, in order to prevent the bottom of the cuttings from accumulating water when taking root, each hole plate with cuttings is padded with an empty hole plate.

1.3.1 Post-cutting management

① temperature and humidity control. Osmanthus fragrans have strict requirements on temperature and humidity, so they should be watered at the seedling stage, and the ground should not be too wet or too dry. Water should be watered every 2-3 days within two months after cutting, but the ground should not be waterlogged and dry in summer. The suitable temperature is 22 ℃ ~ 25 ℃ and the humidity is above 90%, so as to promote healing and rooting.

② reasonable illumination. After cutting into the summer, in order to prevent the leaves from being burned by the sun, it is necessary to build a black shading net on the seedbed to shade.

③ keeps warm in winter. Cutting in autumn, after entering the winter, it is necessary to build a plastic greenhouse to keep warm and wet, so as to ensure the safety of seedlings through the winter.

Prevention and cure of ④ disease. The management and protection at the seedling stage can not be ignored, and the disease should be sprayed in time to ensure survival. The main disease of Cinnamomum cassia is anthracnose, and there are gray disease spots in the middle of the leaves. If not controlled in time, it will infect other plants. It can be sprayed with 1000 times of carbendazim for control. Once a week, spray for 3 times or 4 times.

After careful management and protection, the cuttings of sweet-scented osmanthus can take root and survive after 4 months. If they are cut in autumn, they can be transplanted in the following spring.

2 grafting

2.1 grafting time

Grafting can be carried out more than 3 ~ 4 months, and shoot grafting can also be carried out in May ~ June.

2.2 preparation before grafting

Razor, scissors, grafting knife, binding rope and transparent plastic bag, grafting knife with commonly used double-sided blade is better.

2.3 rootstock selection

The bottom of 3-year-old plant with strong moisture resistance and rot resistance was selected as rootstock. At present, wild sweet-scented osmanthus and fast-growing osmanthus are mainly used. Wild sweet-scented osmanthus is an ideal rootstock because of its moisture resistance, strong wear resistance, developed root system, strong branches, fast-growing wound healing and high survival rate. Scion selection selects new branches of mother plant with high ornamental value, good growth and no diseases and insect pests as scions. When grafting, you should choose a place where there is no light, when the wind is not strong, so as to facilitate the healing of the interface.

2.4 Old branch grafting

To first cut off the branches of the selected rootstock, in order to ensure the beauty of the plant in the future, the rootstock can retain 20~30cm, and use a small blade to smooth the cut of the rootstock, not high and low. Also use a blade to cut off the bottom of the scion at a bevel of 30. First cut twice, then cut into a triangle. When grafting, make sure that each scion has a bud head, and cut the top of the rootstock obliquely with a blade. Do not hurt the wood layer, the cut should be slightly longer than the length of the scion wedge. Then insert the scion obliquely to ensure that the scion is completely fastened to the cut of the rootstock. One rootstock can be grafted with two scions. Then use plastic rope to tie up, because the climate has not completely rebounded in March to April, in case the plant is frozen to death, but also put a plastic bag on it, tie it tightly with a rope. Finally, the newly grafted plants were put into the greenhouse in time to ensure the survival of the grafted seedlings.

2.5 shoot grafting

Also known as bud head grafting, the survival rate of grafting is high, up to more than 95%. Cut off the germinated branches and leave the 2~4cm. Branches should not be lignified, otherwise survival will be affected. In general, the number of branches on the rootstock varies, and at least 2 can be grafted. When cutting the bud head, the lower part of the branch is obliquely cut with a blade, both sides are carried out, and the grafting place is trimmed into a flat shape. Then use a knife to separate the branches from the middle, the cut can not be too deep, according to the length of the scion, it is necessary to insert the scion directly into the branch, each of which can be firmly fastened with plastic rope. After the grafting is completed, cover it with a plastic bag and put it in the plastic greenhouse.

2.6 Post-grafting management

The grafted seedlings survive faster, but it is also necessary to master the temperature and humidity in the greenhouse. If the climate is too humid, the greenhouse should be opened in time for ventilation. In order not to let the ambient temperature change too quickly, it can be covered with a sunshade net. After grafting, it can grow into a new plant after one year of careful management.

3 planting in pots

Pots and nutritious soil pots can choose plastic container pots or container gallon pots. During cultivation, attention should be paid to the coordination of the proportion of pot diameter and plant crown diameter. Generally speaking, the crown diameter of large colored leaf cinnamon can be 1 / 2 times larger than that of the basin mouth. The plastic pot container of 8~10cm is used for 1-year-old seedlings, the container pot of 10~14cm is selected for 2-year-old seedlings, and the plants of more than 3 years old should be planted in 30cm container pot. Do not plant small plants in large pots, otherwise wet potted soil can easily lead to rotting roots. Sweet-scented osmanthus likes loose, fertile and slightly acidic matrix rich in organic matter. For alkaline soils, humic acid should be added or 0.2% ferrous sulfate should be used for soil improvement. Acid soil can be neutralized with plant ash, lime and so on. Generally, the basin soil can be cultivated with rotten leaf soil (or peat), ∶ garden soil, ∶ sand soil (or river sand) = 5 ∶ 3 ∶ 2, or humus soil and sandy loam soil. After the basin soil is prepared, the pH value should be controlled in the range of 5.56.5. You can also choose 30% mature sawdust + 40% coconut bran + 15% coarse river sand + 15% perlite or soilless cultivation with peat ∶ vermiculite = 1 ∶ 1.

3.1 loading basin

Cutting seedlings or container grafted seedlings after planting the root system is more developed, but also more conducive to the survival of seedlings, so planting colored leaf sweet-scented osmanthus can be planted in pots all year round. However, spring and autumn are the most suitable time for potting, and the transplanted seedlings should not damage the root system. When installing the basin, it is necessary to pad a plastic window screen at the hole in the bottom of the basin to prevent pests such as earthworms from drilling into the basin. When loading the basin, put the seedling in the appropriate depth in the center of the basin, then add the substrate and press the edge of the basin slightly with your hand. Do not press the root of the seedling. The distance between the substrate and the mouth of the basin should be 2 ~ 3cm for watering. After installing the basin, the phenomenon of seedling lodging caused by watering or on the basin is more serious, so it is necessary to support the seedlings in time. If it is put on the basin during the growing period, the upper branches and leaves need to be pruned properly to reduce water evaporation. At the same time, measures such as shading and cooling, spraying water and moisturizing should be taken to restore normal management until the plant germinates and grows.

4 cultivation and management

4.1 nurturing the environment and placement

Potted cinnamon should be placed in a greenhouse with ventilation, sufficient sunshine and good drainage. The arrangement should be beneficial to management and appreciation. Generally, the nursery should be divided according to the size of the production seedlings, or according to the water demand of different plants and different zones of acidity and alkalinity, and the plants with the same environmental conditions should be placed in the same area. the same management measures are adopted to facilitate management and plant growth and development. Plant density should be placed with the growth of the plant, move the basin spacing in time, it is appropriate to branches do not cross each other, do not place too dense, otherwise it is easy to cause diseases and insect pests.

4.2 watering

The basin soil should be dry and wet, not too wet or stagnant water, otherwise it will easily lead to rotten roots and fallen leaves. Generally, the new shoots are less watered before germination or on cloudy and rainy days, and usually watered to keep the water content of the basin soil about 50%. Watering should be sufficient in the case of high temperature and dryness in summer. Water should be watered once every morning and evening, and the method of shading net should be adopted at noon to reduce the effect of high temperature. at the same time, water is often sprayed on the leaf surface and around the flowerpot to create a humid local environment.

It is best to use micro-spraying, sprinkler directly to the container, but also can be used as fertilization, and fertilization is uniform, the effect is good. It is better to use soft water. If you use groundwater or tap water, you need to place it in the pool for a period of time. The best time to water is in the morning, which can reduce the occurrence of diseases and insect pests. Attention should be paid to eliminating stagnant water in rainstorm weather.

4.3 fertilization

The newly planted seedlings can grow new roots in about 30 days, but due to the limited pot substrate in the container, they can not obtain enough nutrition in the soil. In order to shoot many times in a year, regular topdressing is needed before each shoot, and the fertilizer should not be excessive. Do not apply immature raw fertilizer, otherwise it is easy to burn seedlings. Compound fertilizer is better for topdressing, but sulfur-based compound fertilizer should be selected, and fertilizer containing chlorine-based fertilizer should not be used, so as not to affect the normal growth of plants due to salinization of basin soil. Fertilization can use nutrient solution and compound fertilizer as topdressing, it is best to use slow-release fertilizer with a ratio of nitrogen, phosphorus and potassium of 21 ∶ 5 ∶ 12, or water-soluble fertilizer or compound fertilizer can be irrigated in water with a concentration of 0.1% ~ 0.5%, topdressing every 7-10 days during the growing period, and fertilization can be suspended during flowering and winter cold periods. In addition, 0.2% potassium dihydrogen phosphate and 0.2% silicon-boron-manganese fertilizer are sprayed once every half month to increase the shoot growth thickness, improve the leaf function, and make the branches and leaves of sweet-scented osmanthus plants grow beautifully. Water-soluble fertilizer has the advantages of high cost and good effect, and can be used in seedling stage. Compound fertilizer has low cost and can be used for small seedlings and small container seedlings. Silver edge color leaf cinnamon bogey single urea or single application of nitrogen fertilizer, otherwise the leaf color silver edge will be converted to green.

4.4 Light and temperature

Cinnamomum cassia is a light-loving tree species, but the seedlings just planted need to be shaded to facilitate the normal growth of seedlings. In the harsh environment of high temperature, muggy heat and long drought, in order to make potted cassia safely through summer, special attention should be paid to daily maintenance and management. Potted plants must be cooled to prevent heat, and 50% shading net and high shed should be used for shading to ensure ventilation and ventilation.

Yinbian Cassia has strong cold resistance, but the northern region cannot bear the low temperature below-10 ℃. When the temperature drops to severe cold in November, the cultivation site should build a plastic film greenhouse in time to protect potted cassia through winter and prepare for its growth in the coming year.

4.5 adjust basin spacing and loosen basin soil regularly

When the seedlings are first put on the pot, put them as much as possible from basin to basin. After a period of growth, the plant spacing should be adjusted in time. If the basin soil is hardened after watering, the basin soil should be loosened in time to make the air circulate and the plant grows well. At the same time, it can remove moss and weeds from the soil.

4.6 integer pruning

Potted colored leaf cinnamon is generally trimmed into a single dry type. Starting from the seedlings, a trunk is selected and topped at the predetermined height of the trunk to germinate 3 ~ 5 lateral branches to form a crown. After that, it was pruned once a year before sprouting in winter and spring, cutting off diseased branches, over-dense branches, thin and weak branches, and truncating the plants with strong upper and lower weak and poor tree shape, so as to promote the lower part to sprout adventitious buds and grow new branches. But pruning should not be excessive, otherwise it is easy to germinate and grow branches, affecting the number of flowers.

For the plants with taller growth and lack of branches and leaves in the lower part, the trunk above 2 beat 3 or 3 beat 4 can be amputated to promote new branches in the lower trunk. In the coming year, it is found that only long branches or improperly positioned branches and other messy branches should be cut off to form a plump natural shape. Top-heavy, overgrown trees cut off their upper strong branches by about 1x4 every year. At the same time, it is necessary to cut off dense branches, weak branches, disease and insect branches, long branches and old branches that cannot blossom, so as to facilitate ventilation and light. All the plants after pruning and shaping should strengthen the management of water and fertilizer. After plastic surgery, if there are clusters of sprouting in the base or middle of the trunk, it should be erased in time.

4.7 change the basin

Changing pots is one of the important measures to grow colored cinnamon. Generally, you can pour the basin once a year. When putting on the basin, an appropriate amount of fermented pig manure or cake fertilizer should be mixed as base fertilizer. Changing the basin can be carried out in the humid season, cut off part of the soil (root), retain part of the original soil (root), add new soil, pour through water, and put it in a shaded place for management. After 15 days, the light can be accepted, but the plants just put on the pot should be watered less at the initial stage, keep the basin soil moist, and gradually strengthen the fertilizer and water after the root system grows completely and stably.

(5) Disease and pest control

5.1 Diseases

The common diseases are leaf blight, anthracnose, brown spot and so on. The bottom of the flowerpot does not leak, there is stagnant water in the pot, the root is injured for a long time, the ground temperature is high, and withered leaves are easy to occur when evaporation is large. The disease often occurs from July to September and is more common in the apical lobe. Prevention and control methods: 50% methyl thiophanate can be sprayed and 800 times of sulfur suspension can be disinfected. When the disease is serious, you can spray 500 times of 70% mancozeb wettable powder or 600 times of 30% copper chloride suspension, once every 10 days, 2 times continuously. Anthracnose mostly occurs on the old leaves, and the disease spots are mostly at the tip and edge of the leaves, which are easy to occur under the conditions of high temperature, high humidity and poor ventilation. Prevention and treatment methods: careful maintenance, found that diseased leaves should be cut off in time, watering from the edge of the basin, immediately spraying 25% anthrax Ling wettable powder 500 times liquid, continuous spraying 2 times 3 times, can be effectively controlled. Brown spot occurs at leaf tip and leaf margin. The prevention and control methods are the same as above.

5.2 insect pests

The main pests are rolled leaf larvae, red spiders, shell insects, grubs and so on. The curly leaf larvae nibble on the new young leaves, resulting in poor or no growth of new shoots. Once it happens, 2.5% of the enemy can be used to kill 1500 ~ 2000 times the liquid spray. Most of the red spiders occurred from May to August, the injured place faded green, then showed gray-white patches, the leaves lost their luster, and in serious cases, a large number of fallen leaves could not bloom. The harm caused by the red spider can be effectively eliminated by spraying the back of the leaf with 2000 times of propargite or propargite. Grubs feed on sweet-scented osmanthus roots to form dark leaves, weak growth of potted flowers, and even death of the whole plant. 1000 times of chlorpyrifos EC can be selected to irrigate the roots. If the ventilation is poor, the temperature and humidity are too high, it is easy to be harmed by scale insects, and in serious cases, it will cause a large number of fallen leaves and cause branches to die. Prevention: keep ventilated and transparent, the temperature should not be too high. In case of serious occurrence, 1000 times liquid can be used to spray and kill.

The above is the whole content of pot Yinbian color leaf cinnamon reproduction and pest control cultivation techniques, because the length is long, it is recommended that you collect and learn, if you have other needs, welcome to leave a message under the comments of Huinong website!

Cultivation methods and maintenance key points of sweet-scented osmanthus: sweet-scented osmanthus likes warm and humid environment, but has a certain ability to endure shade. It is suitable to grow in deep, well-drained, fertile and humus-rich sandy loam, and is not resistant to drying, early and barren. In shallow and barren soil, the growth is particularly slow, the branches and leaves are sparse, the leaves are thin and small, the leaves are yellowing, and there is no flowering or rarely flowering, or even periodic withering, and in serious cases, the whole sweet-scented osmanthus plant dies. The average temperature in the planting area is 14: 28 ℃, the average temperature in July is 24: 28 ℃, and the average temperature in January is above 0 ℃. Humidity is very important for the growth and development of sweet-scented osmanthus, requiring an annual average temperature of 75%-85% and an annual precipitation of about 1000 mm, especially when young and adult trees blossom. In case of drought, strong sunshine and shade are disadvantageous to their growth, and generally require 6-8 hours of light every day. Watering: achieve timely and appropriate watering, master "dry, wet", do not dry, watering thoroughly, generally summer watering morning and evening; winter noon watering; master "two less and one more", that is, less watering before new shoots occur, less watering in cloudy and rainy days, and more watering in dry weather in summer and autumn. Fertilization: after sprouting in spring, fully mature thin cake fertilizer and water are applied about every October to promote sprouting and branching. After July, thin rotten chicken and duck dung water or fish mixed water was applied, or 0.5% superphosphate was added to the above fertilizer solution to promote germination and differentiation. When the last liquid fertilizer based on phosphate fertilizer was applied at the beginning of September, the sweet-scented osmanthus grew luxuriantly, blossomed more and tasted fragrant. If there is insufficient fertilization, especially phosphate fertilizer, there will be fewer branches, fewer flowers, and less fragrance. Propagation: Osmanthus fragrans can be propagated by sowing, leaning, cutting, pressing, cutting and other methods, generally relying mainly on grafting and cutting propagation. The rootstock is lobular privet, which can blossom in the same year after joining, and the grafting time is mostly carried out in summer. A large number of sweet-scented osmanthus seedlings can be propagated by cutting method, and the time is mostly in February when the sap is about to flow. In order to promote rooting and prevent diseases, the cuttings were sprayed with 800-1000-fold trichlorfon one month before cutting, disinfected with lime water 10-15 days before cutting, and soaked in 100ppm's naphthalene acetic acid solution for 8-10 hours before cutting. Cut crops into the soil at a depth of 2 to 3, immediately water them after cutting, and often maintain a certain degree of humidity, and a sunshade net can be set up above the seedbed. It will take root in about 2 months. Once transplanted in the second year, it can be planted in the nursery in the third year. Potted sweet-scented osmanthus, summer can be placed in the courtyard under the sun, no shade, winter in the general indoor can be safe to winter. Pruning: generally, pruning should be carried out after flowering or before sprouting in early spring. if the trunk is too high and the tree shape is poor, it is advisable to cut off the branches of the whole tip at the height of 2, 3 and 3, so as to stimulate the sprouting of new branches at the base of the trunk; for those with too wide crown and too strong growth, it is appropriate to cut off the upper strong branches and retain the weak branches so as to promote the balanced growth of the whole branches. For the branches that are too dense and grow in general, it is appropriate to prune them carefully and keep the branches moderately to promote their growth and sturdiness. Diseases and insect pests control: there are blight, soot, anthrax, brown spot, leaf blight and other diseases and black whitefly, shell insects, sweet-scented osmanthus leafhoppers, aphids and other pests occur. Under the condition of poor ventilation and light transmission, the harm is more serious, so it is necessary to prescribe the right medicine and prevent it in time.