Key technical points of pest control of radish

1. Main diseases: 1. Black heart disease of radish: black rot is a disease caused by black rot fungus. The main symptoms are blackening of root center and blackening and rot of vascular bundles of fleshy root. The seeds can be soaked in 50 warm soup for 30 minutes, or Fumishuang 100 times solution for 2 hours, and 800 times liquid substituted ammonium can be sprayed. The prevention and treatment can be sprayed with a mixture of 4000 times of neophytomycin or 3000 times of 50%DT500 or 3000-4000 times of agricultural streptomycin and 50 times of carbendazim, once every 10 days, for 3 times. 2. Downy mildew: 53% gold redomil 600 times, 72% metalaxyl manganese zinc 500-600 times, 66.8% mildew 600 times, 70% Antaisheng (zinc-rich) 500-700 times, Dasheng 600 times and spray 600 times after rain or pre-onset. 3. Soft rot: (1) apply lime to the soil, spread 40 kg of quicklime per mu, pay attention to waterlogging, not partial application of nitrogen, apply more phosphorus, potassium and organic fertilizer; (2) pay attention to the prevention and control of insect pests, reduce insect wounds, remove seedlings without harming roots, and harvest in time (3) before or at the initial stage of the disease, 30% copper oxychloride suspension or 77% can kill wettable powder 600,800 times or 72% agricultural streptomycin sulfate soluble powder 4000 times. One of the above solutions can be selected for root irrigation treatment, each plant 0.30kg, once every 10 days, 2-3 times continuously. 4. Virus disease: in the early stage, 1.5% of Zhishanling 500 times or 20% of virus A wettable powder 500 times or 2% Ningnanmycin 200 times can be sprayed for 3 times. It was found that aphids could be sprayed with 1000 times of dimethoate EC. To prevent high temperature and drought. Second, the main insect pests: radish pests are yellow striped beetle, small land tiger, cabbage worm (cabbage butterfly larva) and drill heart worm (cabbage borer larva) and so on. 1. Yellow striped jumping beetle: in the larval stage, 90% trichlorfon 500x solution can be used to irrigate the root or spray Shachongshuang 800x or spread Xeroxben granules on the ground, etc.; adult drug control, choose 2.5% kung fu EC 1500-2000 times per mu or 2.5% enemy-killed EC 4000 times or 48% Lesbon 1000-1500 times per mu. 2. Small land tiger: Lesbon granules and Ruijin special mixed fine sand can be used to sprinkle in the sowing ditch. When the seedlings are unearthed, they can be irrigated or treated with 2000 times of 50% phoxim or 25% of fenpropathrin or 8000 times of permethrin emulsion or 800 times of trichlorfon crystals, or can be trapped with grass, smashed vegetable leaves, sprayed with 400 times 500 times of 90% crystal trichlorfon, and scattered beside the roots in the evening, the insecticidal effect is very good. 3. Aphids: when the aphid rate reaches 10% or an average of 3-5 aphids per plant, it should be sprayed: 40% dimethoate 800-1000 times liquid, or imidacloprid (lice aphid, aphid lice net, great hero, Yichuanjing) should be sprayed alternately according to the dosage per mu.