Teacher, good afternoon! The main diseases and pests of carrots are black rot, fungus nuclei, morbid rot, carrot piping, phoenix butterflies and ground pests. Black corruption: before being kept, damaged and sick carrots are removed and the rest are to be dried and preserved. Carrot damage is avoided during harvesting and transport. Bacillus nuclei: in the early stages of the disease, 50% of the fungic acid, 1,500 times the fluid, was sprayed at intervals of 7-10 days and 2-3 times. Soft decomposition: in the early stages of the disease, drugs such as new methacin 4,000 times more are sprayed. First, the main diseases of carrots1 and carrots are black, fungi, and soft. (1) black decomposition1 primarily endangers the root of the flesh and forms an irregular or circular, dimpled disease with a black mold. It's dark and rotting. 2 method of prevention and treatment: to remove the physical root of the disease before storage and to store it in the sun. Protection against damage during harvesting and shipment. (2) the disease of fungi nuclei1 is primarily harmful to the roots of the flesh, partially softened and decayed, and has white cotton filaments and black rat faeces. In the early stages of the disease, 40 per cent of the bacterial net wettable powder was sprayed 1,000 times lessreluent, or 50 per cent of the hygienist humid powder 1,500 times lessreluent, or 50 per cent of the agrolygic humid powder 1,500 times lessreluent, once for 7-10 days and 2-3 successive times. (3) soft decomposition 1 endangers the roots of the flesh, partially softened and rotting, spills of juice and stinks. It should be done in a timely manner, by removing the posterior cavity and filling it with lime, and with care to combat pests. At the beginning of the disease, 72 per cent of the cyanide or cyanide copper was injected with 1000-1200-fold diluent or 4,000-fold dilution of new cocin. 2. Carrot pests include, inter alia, carrots and veggies. In time, treatment is provided with hcb or chloromethamphetamine+2. 5% pyrethrin emulsion, or 20% of pyrethrin emulsifiable cream, or 3000 - 4000 times diluent spray, respectively. Second, why there are many wormholes1 and many worm holes on the surface of carrots may have been attacked by underground pests such as thorium, a pest that lives underground, and that mainly feeds on the roots of plants. Underground pests, such as thorium, thorium and golden needle worms, eat carrots and when they are harvested, they are found to be full of worms, which seriously affect their production and commerciality. For ground pests such as thorium, the method of control is the application of 3 kg of phenylamphetamine granules and 3 kg of thiophosphorus granules per acre at the time of thawing; after planting, 1 kg of thorium cream per acre, 1 kg of high-efficiency chlorocypermethrin per acre and 1 kg of subsurface pests after seeding
