What is cyclamen wilt? How to prevent?

Cyclamen wilt is a disease of leaf wilting caused by Fusarium oxysporum. At the initial stage of infection, some leaves of the plant were yellow, wilted in sunny days, recovered at night, and wilted again in the daytime until death. Part of the petiole shows edema, in the case of high air humidity, the disease spot director out of cotton-like white colonies, sometimes with light red.

Disease conditions: in the greenhouse where cyclamen has been cultivated for many years, due to the bacteria in the soil, the pathogen enters the root from the bottom hole of the basin with watering. The plants with weak growth and injured roots of □ are more likely to be infected. The disease occurred annually in protected cultivation, and the peak of the disease was in July and August.

Prevention and control measures: after the occurrence of Fusarium wilt, most drugs have no obvious therapeutic effect, so prevention and comprehensive treatment should be given priority to in production.

1. Disinfection of facilities. When cyclamen is all sold, it will be sterilized thoroughly and disinfected after removing withered leaves, residual flowers, weeds and other wastes. The growing season can be carried out in front of cyclamen buds: in front of leaves, fumigating the shed with chlorothalonil aerosol for 3 times, the first and third times are four or five days apart, and the first and third times are 7 to 10 days apart. Each solar greenhouse with an area of 1 mu uses three or four boxes. Ignite the aerosol after 5: 00 p. M. and seal the greenhouse for more than 4 hours.

2. Seed disinfection. Soak the seeds with 1000 times potassium permanganate for 12 hours, remove the solution with water and sow the seeds.

3. Matrix disinfection. Conventional matrix disinfection in the basin before-week, per cubic meter of land carbendazim 500g mixed soil, or spray 1000 times potassium permanganate. Can also be quickly extinguished in the basin-month before mixing soil, 20 to 30 grams per square meter. After disinfection, pay attention to protect the matrix to prevent secondary pollution. Fully turn the sterilized matrix 7 days before use to make it breathable and volatilize the residual drugs.

Prevention and control of cyclamen wilt 1. The symptom of the disease is caused by Fusarium oxysporum. At the initial stage of infection, some leaves of the plant turn yellow, the leaves of the plant wilt in sunny days, can recover at night, and wilt again during the day until death. The petiole is edematous and sometimes the epidermis is longitudinally split. In the case of high air humidity, the disease spot director out of cotton-like white colonies, sometimes with light red. Fusarium wilt is a soil-borne disease, and the affected parts turn brown and necrotic from the bottom up. The corm of the diseased plant was cut transversely, and the vascular bundles turned brown and the corm generally did not rot. Second, the route of transmission of Fusarium wilt overwintering as mycelia or protochlamydospores in the soil or attached to seeds. Pathogens generally invade from young roots or wounds, enter vascular bundles, block ducts, produce toxic substances, and cause corm leaves to turn yellow and die. The disease is serious under the condition of high temperature and humidity, and the germs are spread through water flow. Third, in the greenhouse where cyclamen has been cultivated for many years, due to the bacteria in the soil, the pathogen enters the root from the bottom hole of the basin with watering. Plants with weak growth and root wounds are more likely to be infected. The disease occurred annually in protected cultivation, and the peak of the disease was in July and August. Fourth, prevention and control measures after the occurrence of Fusarium wilt, most drugs have no obvious therapeutic effect, so prevention and comprehensive treatment should be given priority to in production. 1. Facility disinfection when cyclamen is sold, it will be thoroughly cleaned and sterilized, and the waste such as withered leaves, residual flowers and weeds will be removed and disinfected. The growing season can be carried out in front of the cyclamen bud: in front of the leaves, fumigating the shed with chlorothalonil aerosol for 3 times, the first and the third four or five days apart, the second and the third seven to 10 days apart. Each solar greenhouse with an area of 1 mu uses three or four boxes. Ignite the aerosol after 5: 00 p. M. and seal the greenhouse for more than 4 hours. two。 When disinfecting and sowing, soak the seeds with 1000 times potassium permanganate for 12 hours, then sow the seeds with water. 3. Matrix disinfection routine matrix disinfection in the week before the pot, 500g of carbendazim per cubic meter of land mixed with soil, or sprayed 1000 times potassium permanganate. Can also be used to quickly extinguish the soil a month before the basin, 20 to 30 grams per square meter. After disinfection, pay attention to protect the matrix to prevent secondary pollution. Fully turn the sterilized matrix 7 days before use to make it breathable and volatilize the residual drugs. 4. Ground disinfection first thoroughly scraped the ground, and then sprayed 1000 times potassium permanganate, or 3000 grams of carbendazim per mu mixed with an appropriate amount of clean river sand, evenly sprinkled on the ground h. Use 30 to 60 grams per square meter, add an appropriate amount of clean river sand, turn 20 cm deep, and cover with plastic film. Soil temperature 10 ℃ fumigation 27 days, 15 ℃ fumigation 20 days, 20 ℃ fumigation 16 days, 25 ℃ fumigation 13 days. 5. Disinfect the pots. Soak the used pots with 1000 times potassium permanganate for 2 hours. If possible, use the new pots. 6. Flowerpot off-ground cultivation if possible, set up an elevated special flower bed or use a flowerpot rack to let the flowerpot leave the ground. 7. Chemical control found that susceptible plants were removed and destroyed, or 500 grams of 70% methyl topiramate was used, plus 5 kg of clean river sand, mixed with uncontaminated honeycomb coal sieving furnace slag, and then sprinkled on the basin soil of diseased plants once every 3 days for 3 times in a row. The root was irrigated alternately with 80% thiophanate methyl 1000-fold solution, 80% carbendazim 800-fold solution, 80% carbendazim 800-fold solution, and 2000-fold solution of carbendazim, with a dose of 100ml per plant, once every 7 to 10 days. Prevention and control of cyclamen wilt 1. The symptom of the disease is caused by Fusarium oxysporum. At the initial stage of infection, some leaves of the plant turn yellow, wilt in sunny days, can recover at night, and wilt again during the day until death. The petiole is edematous and sometimes the epidermis is longitudinally split. In the case of high air humidity, the disease spot director out of cotton-like white colonies, sometimes with light red. Fusarium wilt is a soil-borne disease, and the affected parts turn brown and necrotic from the bottom up. The corm of the diseased plant was cut transversely, and the vascular bundles turned brown and the corm generally did not rot. Second, the route of transmission of Fusarium wilt overwintering as mycelia or protochlamydospores in the soil or attached to seeds. Pathogens generally invade from young roots or wounds, enter vascular bundles, block ducts, produce toxic substances, and cause corm leaves to turn yellow and die. The disease is serious under the condition of high temperature and humidity, and the germs are spread through water flow. Third, in the greenhouse where cyclamen has been cultivated for many years, due to the bacteria in the soil, the pathogen enters the root from the bottom hole of the basin with watering. Plants with weak growth and root wounds are more likely to be infected. The disease occurred annually in protected cultivation, and the peak of the disease was in July and August. Fourth, prevention and control measures after the occurrence of Fusarium wilt, most drugs have no obvious therapeutic effect, so prevention and comprehensive treatment should be given priority to in production. 1. Facility disinfection: when cyclamen is sold, it will be sterilized thoroughly and disinfected after removing withered leaves, residual flowers, weeds and other wastes. The growing season can be carried out in front of the cyclamen bud: in front of the leaves, fumigating the shed with chlorothalonil aerosol for 3 times, the first and the third four or five days apart, the second and the third seven to 10 days apart. Each solar greenhouse with an area of 1 mu uses three or four boxes. Ignite the aerosol after 5: 00 p. M. and seal the greenhouse for more than 4 hours. two。 Seed disinfection: soak the seeds with 1000 times potassium permanganate for 12 hours, then sow the seeds with water. 3. Matrix disinfection: conventional matrix disinfection in the week before the pot, every cubic meter of land carbendazim 500g mixed soil, or spray 1000 times potassium permanganate. Can also be used to quickly extinguish the soil a month before the basin, 20 to 30 grams per square meter. After disinfection, pay attention to protect the matrix to prevent secondary pollution. Fully turn the sterilized matrix 7 days before use to make it breathable and volatilize the residual drugs. 4. Ground disinfection: first scrape the ground thoroughly, then spray 1000 times potassium permanganate, or mix an appropriate amount of clean river sand with 3000 grams of carbendazim per mu, spread evenly on the ground h. Use 30 to 60 grams per square meter, add an appropriate amount of clean river sand, turn 20 cm deep, and cover with plastic film. Soil temperature 10 ℃ fumigation 27 days, 15 ℃ fumigation 20 days, 20 ℃ fumigation 16 days, 25 ℃ fumigation 13 days. 5. Disinfect the pots. Soak the used pots with 1000 times potassium permanganate for 2 hours. If possible, use the new pots. 6. Flowerpot off-ground cultivation if possible, set up an elevated special flower bed or use a flowerpot rack to let the flowerpot leave the ground. 7. Chemical control found that susceptible plants were removed and destroyed, or 500 grams of 70% methyl topiramate was used, plus 5 kg of clean river sand, mixed with uncontaminated honeycomb coal sieving furnace slag, and then sprinkled on the basin soil of diseased plants once every 3 days for 3 times in a row. The root was irrigated alternately with 80% thiophanate methyl 1000-fold solution, 80% carbendazim 800-fold solution, 80% carbendazim 800-fold solution, and 2000-fold solution of carbendazim, with a dose of 100ml per plant, once every 7 to 10 days.