Turfgrass turfgrass is also called cotton rot, oil blotch, etc. The temperature is high, rainfall is high, humidity is high, soil nitrogen content is high or alkaline soil can easily aggravate the occurrence of diseases. Therefore, to create a good habitat conditions for the turf, careful management, reasonable fertilization, watering, timely spraying prevention, is the key to the prevention and treatment of the disease.
First, the symptoms of Pythium can infect various parts of the lawn, from the seed to the adult will be victimized, the earlier the time of infection, the greater the damage. If the disease is infected when the seeds are germinated, the germs will become moldy and will not emerge; if they become sick after emergence, the seedlings will trip. After the onset of the adult plant, it is typical to have a villous white hyphae on the turfgrass strain 2 to 3 cm above the ground in the early morning after dew or heavy rain. The mycelium disappears after drying, and the leaves wither and dehydration disappear. After the dry straw color, forming a dead circle. If it continues to heat and humid for several days, the disease will spread rapidly and endanger the entire lawn.
Second, prevention and control measures
1. The establishment of good site conditions to prevent the turf water from being affected by the grass to create a good growth conditions for the turf, so that it is robust and healthy, it is of great significance for the prevention and control of Pythium wilt. Before the turf is planted, the soil shall be ploughed and sifted, the impurities such as stones shall be removed, and the soil with excessively viscous or sandy nature shall be improved so as to have a high quality soil of 20 to 30 cm, and the texture shall be the same; digging in the construction Wherever there is a trench, the backfill should be filled with water and moistened to prevent subsequent collapse of accumulated water; the bed surface should be slightly tortoise-shaped to make the drainage unobstructed; when the turf area is too large, the water must be buried in the buried pipe to reduce the surface area. Accumulation of water to prevent the grass from suffering.
2. The selection of disease-resistant varieties, the use of mixed sowing methods to build grass-cold-season grass in the characteristics of different varieties of different pros and cons. Such as rye grass color is good, as long as the density is appropriate, the lawn is also more delicate, extensive management, fast into the ping, but susceptible to fungal infection; Festuca characteristics and ryegrass are similar, but thick grass, anti-Pythium mildew wilt disease slightly stronger In ryegrass, it also belongs to disease-prone cultivars; while Poa spp. has stronger resistance to Pythium and better grass quality, but it is slower in ping-panning, and the competitive ability of young grass and weeds is too weak. Combining their advantages, they are mixed with 60% of Poa, 15% of ryegrass, and 25% of Festuca so as to make ryegrass and tall fescue grow into platts and increase their ability to compete with weeds. Control the growth of ryegrass and tall fescue, leaving a space for growth of early-maturing pods, so that the advantages of all varieties can be fully utilized. This will not only help prevent Pythium wilt, but also make the quality of the turfgrass to be established. ,low cost.
3. Pay attention to disinfection and sterilization before sowing, careful management of seedlings before sowing can be used mancozeb, antiviral, chlorfluazuron or transplanting spirit 600 to 800 times spray bed surface, disinfection sterilization; also can soak the seeds overnight , Dry the water until the epidermis is slightly wet, use mancozeb 250 to 500 grams to mix 500 grams of seeds, so that the seeds outsourcing a thin layer of powder, which is extremely beneficial to the prevention and treatment of early disease. 10-15 days after the emergence of seedlings to start spraying pesticides, can be used 0.1% of carbendazim plus 0.05% chlorothalonil spray; later if the seedlings grow normally, you can spray less or not, if you find the seedling tip For yellowing, it should be sprayed once every 7 days; after the seedlings are unearthed, weeds should be diligently removed to reduce the air humidity of the seedlings, and to strengthen the ventilation of the seedlings to reduce the chance of infection.
4. Rational fertilization and fertilization should be carried out as far as possible in the spring and autumn. The amount of fertilizer should be determined by the color of the lawn, soil fat, the density of the lawn and the length of the grass. The turf color is positive, the soil fertility is good, the lawn is dense, and grass growing less prosperous; the turf is yellowish, the soil is thin, and the lawn is sparse. The first general fertilization should be applied evenly in the middle and early April, with 10 to 20 grams of compound fertilizer per square meter; the second should be applied evenly around 15 to 25 grams of compound fertilizer per square meter around the 20th of September. Drench the water to fully dissolve the fertilizer. During the rest of the year, yellow grass was not used for fertilization. If the grass was slightly yellow, 0.3% potassium dihydrogen phosphate and 0.5% vinegar could be sprayed. When the yellowing of the lawn is serious, 5 grams of urea per square meter is used as top dressing. Allow the soil to dry properly before fertilizing. Apply water after fertilization and try to let the fertilizer dissolve into the soil and reduce the residual amount of surface fertilizer. Generally, the cold-season turf does not grow yellow during the summer and it will not be fertilized. Fertilization will be excessive, growth will be excessive in the early summer, the lawn will be too long, the cell tissue will be too tender, and the disease resistance will be poor. In addition, the dense grass will affect the ventilation and light transmission, making it easy to produce rot. Mildew and mildew. However, if we are afraid of grass infections, the turfgrass will be seriously deprived of fertilizer, resulting in stagnation of turfgrass growth and reduced resistance. Therefore, in the cold-season turfgrass wilt disease season should be controlled fertilizer but do not let it lack of fat. (on)
First, the symptoms of Pythium can infect various parts of the lawn, from the seed to the adult will be victimized, the earlier the time of infection, the greater the damage. If the disease is infected when the seeds are germinated, the germs will become moldy and will not emerge; if they become sick after emergence, the seedlings will trip. After the onset of the adult plant, it is typical to have a villous white hyphae on the turfgrass strain 2 to 3 cm above the ground in the early morning after dew or heavy rain. The mycelium disappears after drying, and the leaves wither and dehydration disappear. After the dry straw color, forming a dead circle. If it continues to heat and humid for several days, the disease will spread rapidly and endanger the entire lawn.
Second, prevention and control measures
1. The establishment of good site conditions to prevent the turf water from being affected by the grass to create a good growth conditions for the turf, so that it is robust and healthy, it is of great significance for the prevention and control of Pythium wilt. Before the turf is planted, the soil shall be ploughed and sifted, the impurities such as stones shall be removed, and the soil with excessively viscous or sandy nature shall be improved so as to have a high quality soil of 20 to 30 cm, and the texture shall be the same; digging in the construction Wherever there is a trench, the backfill should be filled with water and moistened to prevent subsequent collapse of accumulated water; the bed surface should be slightly tortoise-shaped to make the drainage unobstructed; when the turf area is too large, the water must be buried in the buried pipe to reduce the surface area. Accumulation of water to prevent the grass from suffering.
2. The selection of disease-resistant varieties, the use of mixed sowing methods to build grass-cold-season grass in the characteristics of different varieties of different pros and cons. Such as rye grass color is good, as long as the density is appropriate, the lawn is also more delicate, extensive management, fast into the ping, but susceptible to fungal infection; Festuca characteristics and ryegrass are similar, but thick grass, anti-Pythium mildew wilt disease slightly stronger In ryegrass, it also belongs to disease-prone cultivars; while Poa spp. has stronger resistance to Pythium and better grass quality, but it is slower in ping-panning, and the competitive ability of young grass and weeds is too weak. Combining their advantages, they are mixed with 60% of Poa, 15% of ryegrass, and 25% of Festuca so as to make ryegrass and tall fescue grow into platts and increase their ability to compete with weeds. Control the growth of ryegrass and tall fescue, leaving a space for growth of early-maturing pods, so that the advantages of all varieties can be fully utilized. This will not only help prevent Pythium wilt, but also make the quality of the turfgrass to be established. ,low cost.
3. Pay attention to disinfection and sterilization before sowing, careful management of seedlings before sowing can be used mancozeb, antiviral, chlorfluazuron or transplanting spirit 600 to 800 times spray bed surface, disinfection sterilization; also can soak the seeds overnight , Dry the water until the epidermis is slightly wet, use mancozeb 250 to 500 grams to mix 500 grams of seeds, so that the seeds outsourcing a thin layer of powder, which is extremely beneficial to the prevention and treatment of early disease. 10-15 days after the emergence of seedlings to start spraying pesticides, can be used 0.1% of carbendazim plus 0.05% chlorothalonil spray; later if the seedlings grow normally, you can spray less or not, if you find the seedling tip For yellowing, it should be sprayed once every 7 days; after the seedlings are unearthed, weeds should be diligently removed to reduce the air humidity of the seedlings, and to strengthen the ventilation of the seedlings to reduce the chance of infection.
4. Rational fertilization and fertilization should be carried out as far as possible in the spring and autumn. The amount of fertilizer should be determined by the color of the lawn, soil fat, the density of the lawn and the length of the grass. The turf color is positive, the soil fertility is good, the lawn is dense, and grass growing less prosperous; the turf is yellowish, the soil is thin, and the lawn is sparse. The first general fertilization should be applied evenly in the middle and early April, with 10 to 20 grams of compound fertilizer per square meter; the second should be applied evenly around 15 to 25 grams of compound fertilizer per square meter around the 20th of September. Drench the water to fully dissolve the fertilizer. During the rest of the year, yellow grass was not used for fertilization. If the grass was slightly yellow, 0.3% potassium dihydrogen phosphate and 0.5% vinegar could be sprayed. When the yellowing of the lawn is serious, 5 grams of urea per square meter is used as top dressing. Allow the soil to dry properly before fertilizing. Apply water after fertilization and try to let the fertilizer dissolve into the soil and reduce the residual amount of surface fertilizer. Generally, the cold-season turf does not grow yellow during the summer and it will not be fertilized. Fertilization will be excessive, growth will be excessive in the early summer, the lawn will be too long, the cell tissue will be too tender, and the disease resistance will be poor. In addition, the dense grass will affect the ventilation and light transmission, making it easy to produce rot. Mildew and mildew. However, if we are afraid of grass infections, the turfgrass will be seriously deprived of fertilizer, resulting in stagnation of turfgrass growth and reduced resistance. Therefore, in the cold-season turfgrass wilt disease season should be controlled fertilizer but do not let it lack of fat. (on)
Cold Cathode Quartz UV Lamp
Cold cathode glow discharge the positive ion bombardment high purity metal cathode produce secondary electron maintain discharge, cathode current is mainly composed of positive ions contribution, current is lesser, cathode is cold, hence the name "cold cathode";
The lifetime of the cold cathode Quartz UV Lamp is 12000hrs. it is very long.
We have U type,O shape,and also can customs for our client.
Cold Cathode UV Lamp have strong germical effience in 253.7 wavelength,especial for the nuclei acid albumen,it could let the bacteria aberrance or dead.
so this uv lamp suitable use in medical,sanitation,germ study,grocery and pharmacy fields etc.,also use some disinfector,and air purify.
Cold Cathode Quartz UV Lamp
Cold Cathode Quartz UV Lamp, Cold Cathode UV Lamp, Quartz UV Lamp
Ningbo Sunfine UV lighting Co.,ltd. , http://www.uvlightings.com