Common Disease Control Methods for Red Tip Photinia
Red tip photinia is an evergreen tree species in the Rosaceae family. Because the new shoots and young leaves of red tip photinia are bright red, its ornamental value is very high. However, red tip photinia can also face the threat of pests and diseases during cultivation. The editor will now introduce the common diseases of red tip photinia for you.
Red tip photinia
I. AnthracnoseDuring the cutting propagation period, it is susceptible to anthracnose, causing red tip photinia to only take root without sprouting. Control measures: promptly remove severely affected diseased leaves and take them out of the nursery. In the early stage of the disease, spray once every 7-10 days with 70% thiophanate-methyl wettable powder at 500-1000 times dilution, or 65% zineb wettable powder at 600 times dilution.
II. Leaf spot diseaseDuring the growing season, spotted lesions appear on the leaves. Control measures: in winter and spring, promptly remove dead branches and fallen leaves to reduce overwintering sites for the pathogen. Use 50% carbendazim at 300-400 times dilution, or 50% thiophanate-methyl at 300-400 times dilution for control.
III. Slug moth caterpillarsWhen cocoons and infested leaves are found, remove them promptly. During the early larval stage, spray with 80% dichlorvos emulsifiable concentrate at 1000 times dilution, 50% phoxim emulsifiable concentrate at 1000 times dilution, or pyrethroid insecticides at 2000-3000 times dilution. Light traps can also be used to kill them.
IV. Red spider mitesSpray with 20% dicofol at 800 times dilution before new buds sprout in spring, or spray with 40% dimethoate emulsion at 800 times dilution for control.
Common Pest and Disease Control for Red Tip Photinia
Red tip photinia has strong resistance, and no devastating pests or diseases have been found. Common pests and diseases of red tip photinia include damping-off, seedling blight, leaf spot disease, anthracnose, gray mold, leaf spot disease, or damage by scale insects. These infectious diseases often cause large-scale death of red tip photinia in a short period, bringing serious losses to seedling growers. Red Tip Photinia Network cites the views of nursery stock experts to introduce several comprehensive control measures for the reference of seedling grower friends when needed. I. Choose a good nursery site
A light clay loam or sandy loam with good water sources and relatively high terrain should be selected as the nursery site. Adhere to a crop rotation system, and do not continuously cultivate the same red tip photinia on the same nursery plot.
When raising seedlings, the nursery soil must be disinfected in advance. The main methods are the following 4: 1. Formalin disinfection: for each square meter of nursery, use 50 ml of formalin mixed with 10 kg of water and spray evenly on the soil surface, then cover with plastic film or straw bags, keep it closed for about 10 days, uncover the covering to let the gas volatilize, and sowing can be done after two days. 2. Carbendazim disinfection: use 50% wettable powder, mix 1.5 grams per square meter. It can also be prepared into medicinal soil at a ratio of 1:20 and spread on the seedbed, both can effectively control seedling-stage diseases. 3. Quintozene disinfection: for each square meter of nursery land, use 4 grams of 75% quintozene and 5 grams of zineb, mix them, then mix evenly with 12 kg of fine soil. When sowing, place it underneath and cover on top. It has a special effect on anthracnose, seedling blight, damping-off, and sclerotinia disease. 4. Ferrous sulfate disinfection: treat the soil with a 3% ferrous sulfate solution, using 0.5 kg of solution per square meter. It can control seedling blight of coniferous flowers and trees, leaf curl disease of peach and plum, and also control chlorosis caused by iron deficiency in flowers. The nursery land should preferably be deeply plowed in winter, and lightly plowed once before sowing the next year.
II. Seed disinfection
Before sowing, select seeds carefully and discard diseased and weak seeds. Before sowing, the seeds should be treated with chemicals. They can be soaked in a 0.3%-0.5% potassium permanganate solution for half an hour to 1 hour, or soaked in warm water at 50 degrees Celsius for 24 hours, then take out the sunken seeds and soak them in a 0.2% formalin solution for 30 minutes, then take them out and keep them closed for 2 hours. They can also be soaked in a 0.5%-1% copper sulfate solution for 1 hour to 2 hours, then remove the seeds and rinse off the chemical solution with clean water, dry them in the shade, and sow at the appropriate time. Pay attention to the depth when sowing, and do not cover with too much soil, so that the seeds can germinate and emerge.
III. Chemical treatment
Starting from the red tip photinia seedling stage, every 7-10 days, use 50 kg-75 kg of 0.5%-1% Bordeaux mixture per mu of red tip photinia seedbed to spray the young red tip photinia seedlings, so that a protective film forms on the outside of the young red tip photinia seedlings to prevent pathogen invasion. At the same time, fertilization must be well controlled. Fertilizer should mainly be farmyard manure, supplemented by chemical fertilizer. Garbage fertilizer, compost, and barnyard manure may carry pathogens, so they should be piled, fermented, and thoroughly decomposed before use. After the disease occurs, promptly remove diseased red tip photinia seedlings and spread lime powder around the holes of diseased red tip photinia seedlings to prevent spread, and apply chemicals once every 10-15 days. Per mu, 100 kg of 500-800 times dilution of dexon, or 100 kg of 300-800 times dilution of 65% zineb can be sprayed. Alternatively, 150 kg of 1:100 methylarsenic sulfide medicinal soil, or an appropriate amount of 8:2 mixed plant ash and lime powder can be spread on the red tip photinia seedbed for treatment. Copper-ammonia mixture can also be sprayed for treatment.
Gray mold can be prevented by spraying 50% carbendazim at 1000 times dilution, and during the disease period, 50% zineb at 800 times dilution can be sprayed for control. Leaf spot disease can be controlled with 60% carbendazim at 300-400 times dilution or thiophanate-methyl at 300-400 times dilution. Scale insects can be controlled by spraying dimethoate emulsion at 200 times dilution or 800-1000 times dilution. Control of cutworms should be carried out before planting. The land should be properly deep plowed, and phosphorus-containing insecticides such as Tucong Bisha should be spread. If cutworm damage occurs after planting, remedial treatment must be carried out promptly; otherwise, once it spreads, the harm will be great, especially to red tip photinia at the seedling stage, and may cause large-scale death.
What are the common species of photinia? Cultivation techniques for red tip photinia
[Common Questions]What are the common species of photinia? How should they be planted?
[Expert Answer]Photinia is an evergreen tree in the order Rosales, family Rosaceae, genus Photinia, and has high ornamental value. Common cultivated varieties of photinia include red tip photinia, Photinia davidsoniae, Photinia parvifolia, and Photinia glabra. Among them, red tip photinia has the strongest ornamental value, the greatest market potential, and is widely planted. The common species of photinia and the cultivation techniques for red tip photinia are introduced as follows:
Image: Photinia
I. Common species of photinia
1. Red tip photinia:Red tip photinia is the collective name for hybrid species in the genus Photinia of the Rosaceae family. It is named for its bright red new shoots and young leaves. There are about 60 species worldwide, mainly produced in the subtropical and temperate regions of southeastern and eastern Asia and North America. In spring and autumn, the new shoots and young leaves are fiery red, with a brilliant and lasting color, full of vitality. In the hot summer season, the leaves turn bright green, giving a fresh and cool feeling.
2. Photinia davidsoniae:Photinia davidsoniae is also known as luomu, water red tree flower, plum tree, chisel tree, mountain official wood, thousand-year red, etc. It is an evergreen tree in the Rosaceae family, subfamily Maloideae, genus Photinia. It is commonly cultivated in courtyards and near cemeteries. In winter, the leaves remain evergreen and are adorned with yellow-red fruits, quite beautiful. Its color changes greatly throughout the year, and its leaves, flowers, and fruits are all ornamental. It is currently the most suitable garden tree species in the Yangtze River basin and southern China.
3. Photinia glabra:Photinia glabra is also known as fan-bone wood, smooth chisel tree, red lemon seed, shiban wood, mountain official wood, etc. It is an evergreen tree in the Rosaceae family, subfamily Maloideae, genus Photinia, and is similar to Photinia and Photinia davidsoniae, but Photinia has longer petioles, larger leaves, and petals that are nearly hairless near the base, while the inflorescence of Photinia davidsoniae has soft hairs, and its flowers and fruits are larger, making them easy to distinguish.
4. Photinia parvifolia:Photinia parvifolia is also known as cow sinew wood, cow plum, mountain red seed, club-head fruit, club pear, etc. It is a deciduous shrub in the Rosaceae family, subfamily Maloideae, genus Photinia. It grows in low mountain and hilly shrublands below 1000 m altitude or at forest edges and beside ditches. In China, it is mainly distributed in Henan, Jiangsu, Anhui, Zhejiang, Jiangxi, Hunan, Hubei, Sichuan, Guizhou, Taiwan, China, Guangdong, Guangxi, and other places.
Image: Red tip photinia
II. Cultivation techniques for red tip photinia
1. Growth habits:Red tip photinia likes strong light but is also very shade-tolerant. It likes a warm and humid growing environment and is suitable for growing in slightly acidic soil. It is not very strict about climate requirements and can tolerate a low temperature of -18 degrees C. It can be cultivated in all parts of China.
2. Soil selection:The soil for planting red tip photinia is best loose in texture, fertile, and slightly acidic to neutral. Sandy soil is the best choice for cultivation. It is not strict about soil requirements and can also grow normally in red and yellow soils.
3. Cutting cultivation:Under normal circumstances, red tip photinia is propagated by cuttings, so branches that are robust and free of pests and diseases should be selected. Note that the cuttings should preferably be semi-lignified young branches or lignified current-year branches. According to these standards, cut 6-10 cm long branches from the plant to serve as cuttings.
4. Seedling transplanting:The planting time for red tip photinia is generally March-April in spring and October-November in autumn, specifically determined according to local climate conditions. The planting spacing should be determined according to the nursery retention time and cultivation goal. If the plan is to sell one-year-old small shrubs, a plant-row spacing of 35×35 cm or 40×40 cm is suitable, with about 3000 plants transplanted per mu.
5. Pruning and shaping:Red tip photinia has particularly strong branch sprouting ability and grows very fast. It is a tree species that is extremely tolerant of pruning and easy to shape. Shaping and pruning can be carried out all year round, but shaping should mainly be done in winter, mainly by heading back and thinning branches. In summer, when temperatures are high, it is not suitable to carry out heading back and heavy heading back pruning; otherwise, it will be relatively difficult for the plant to recover its vigor after pruning.
6. Appropriate watering:Red tip photinia relatively likes moisture, but excessive water can easily cause disease, so water must be strictly controlled. Watering should be appropriate, but there should be no water accumulation. The best watering time is from 8 to 10 in the morning every day, or from 4 to 6 in the afternoon.
7. Fertilization management:Fertilization for red tip photinia should follow the principle of light and frequent application. In spring, apply urea once every half month, about 5 kg per mu. In summer and autumn, apply compound fertilizer once every half month, about 5 kg per mu. In winter, apply thoroughly decomposed organic fertilizer once, about 1500 kg per mu. Digging trenches and burying the fertilizer is best.
8. Pest and disease control:Red tip photinia has relatively strong resistance, and no devastating pests or diseases have been found for the time being. However, if management is improper or the nursery environment is poor, gray mold, leaf spot disease, or damage by scale insects, cutworms, and others may occur. If these pests and diseases occur, attention should be paid to promptly adopting corresponding measures for control to ensure the normal growth of red tip photinia.
[Editor's Conclusion]As an important ornamental tree species, photinia has many species, great market potential, and broad prospects. The above introduced the common species of photinia and the cultivation techniques for red tip photinia, hoping to be helpful to everyone!