Rust not only harms the leaves of the kidney bean, but also harms the stems and pods. After the pods are affected, the yield and quality of the pods are affected. The peasants must be treated as early as possible. Early onset, generated on the blade pale small raised spots, then to brown, bumps into packets, and gradually increased to about 2 mm, and finally sporulating lesions skin breakdown stack, emitting a red-brown powder. Later on the petiole, stem and pods grew dark brown rust-like stripe, the epidermis ruptured, emitting dark brown germ spores. Severe stems and leaves die prematurely, resulting in severe reductions in yield. The disease is a fungal disease. The pathogens are transmitted by airflow. The water droplets on the plants are the main conditions for the germination and invasion of the bacteria. The relative humidity in the shed, excessive planting, and poor ventilation all contribute to the occurrence of rust. Control methods: 1. Agricultural control. Reasonably dense planting, rotation down. Timely ventilation, sub-film irrigation, reduce indoor air humidity. When watering, it is necessary to pour small water and prevent flooding. 2. Chemical control. In the early onset of the disease, timely spraying control, prevention, can be used 15% triadimefon WP 2000-3000 times, 50% rustin WP 800 times, 40% ozazonone WP 4000 times, 25% The enemy demulsification oil 3000 times or 12.5% Kn95 Fold Flat 3D Mask,Kn95 5 Layers Face Mask,Kn95 Fold Flat Respirator,Kn95 Filters Cup Face Mask Jiangmen anjian biotechnology co. LTD , https://www.jmanjianmask.com