Radish virus disease is one of the main diseases of autumn radish, and it often occurs. Autumn radish radish sowing early, seedling period coincides with high temperature and drought, watering less, high ground temperature, and when the amount of large larvae occurs, the incidence of heavy. Consecutive or adjacent works with crucifers, the viruses infect each other and have a serious illness.
First, the main symptoms: seedling stage, adult stage and seed collection can be on the disease, mainly in the incidence of seedling stage. The incidence of seedlings, the first heart veins, and then along the green veins, followed by the generation of dark and white mosaic leaves, diseased leaves soon collapsed, distorted heart, severe early death. The damage of adult plants was intensified, and the whole plant was often diseased. The leaves of the whole plant showed obvious chlorotic spots, chlorophyll distribution was uneven, and the depth and darkness were obvious. Some leaves are deformed and distorted, and some have ear-like protrusions along the veins.
Second, prevention and control measures: (1) Select disease-resistant varieties. In general, the green skin system is more resistant to disease, and disease-resistant varieties can be selected according to the requirements of the mouthwash and the market. (2) The sowing date is appropriately delayed in the drought year to avoid the high-temperature and drought-sensitive period. (3) Intercropping with field crops to avoid continuous cropping and neighboring work with cruciferous vegetables can significantly reduce disease. (4) Take sorghum live, watering the seedlings and reduce the temperature. (5) Set the seedlings as appropriate and leave the disease-free strain. Drought years shorten seedlings, timely tillage and weeding, and removal of sick and weak seedlings. (6) Control of locusts and yellow strips in time for seedlings. You can insert 30 to 35 yellow plates per mu to trap and kill, or use silver gray, milky white or black film to cover the rows of radishes, or use color film tapes to hang out in the field to drive away. Can also be used 2.5% deltamethrin EC 3000 ~ 3500 times, or 50% anti-inferiority WP 2000 times, 10% imidacloprid wettable powder 10-15 grams per mu 45 kg spray control. (7) Chemical control: There are no ideal therapeutic agents for viral diseases. In the early stage of onset, it can be sprayed with a 500-fold solution of virus A WP, a 1000-fold solution of 1.5% lingzhi lingzhi EC, and a 500-fold solution of 5% bacterin. Spray once every 5 to 7 days for 2 or 3 consecutive times.
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