Autumn beans need to prevent rust
Autumn bean planting grows at high ambient temperatures, with high rainfall, and large bacterial sources (Sporisorium spp.) in the field. Therefore, rust is prone to occur in autumn bean peas, and farmers should conduct comprehensive prevention and treatment as soon as possible. First, the main symptoms: beans throughout the growth period can be infected with the disease, but during the first flower to the result of resistance weakened, increased susceptibility. The disease is dominated by invading leaves. The chlorotic yellowish-white spots appear below the leaves at the beginning of the disease. The spots gradually increase until the entire leaf is covered. On the corresponding back surface of the lesions, the harps spores, which are slightly yellowish-brown, are generated. The uredia spores burst after the rupture of the uredia spores, and black teliospores are sometimes formed on the old leaves of the late growth stage. Leaves yellow and fall off, the plants are short, the pods are small and small, the growth period is shortened, and finally it is dead and dead. Second, the pathogen: basidiomycotina, single cell rust. The source of the infection is the scutellaria spp. in the residue of the spring bean planting pods or in the field. The spores germinate in the spring to produce germ tubes that invade the host with stomata. At 18-25°C, when the humidity of the air is high or the dew is heavy, the water droplets on the surface of the host are most likely to invade the host. The diseased plants are transmitted through the air stream, insects, humans and animals in the field between the plants and the summer spores. Caused by frequent re-infection, the resulting teliospore reactor has become the primary infestation source for leguminous crops grown in spring. Third, the prevention and control methods: to strengthen the management of soil fertilizer and water-based, timely spraying control supplemented by comprehensive prevention and control measures. 1, remove the body of the disease, reduce the source of infection: After the spring bean bean harvest, the stubble seedlings were collected and burned to reduce the source of infection. 2, selection and selection: 1 Select planting: selection of disease-resistant varieties, planting and cultivation, should be double-row planting or single-line planting, so easy to remove water and dredging ventilation is not conducive to the landing and invasion of summer spores. 2 Selection of land: It is best to choose the former crop as a field for planting grasses, and not to choose the former crop as a field for planting legumes or peanuts. This can avoid direct invasion of rust. 3, rational fertilization: Shizujifei, early application of top dressing, increased phosphorus, potassium fertilizer, so that enhanced root nodule activity, plant growth thick, thick green thick leaves, disease resistance increased. 4, timely application of the prevention and treatment: in the early onset of the application of pesticide control. The agent can be sprayed with 50% triadimefon 600-800 times or 50% sulfur suspension 500-600 times or 70% thiophanate-methyl 800-1000 times. Spray once every 8 to 10 days and spray 2 to 3 times. Compact Air Hose Reel,Retractable Air Hose Reel,Retractable Air Compressor Hose,Small Retractable Air Hose Reel NINGBO QIKAI ENVIRONMENTAL TECHNOLOGY CO.,LTD , https://www.hosereelqikai.com