Kidney bean rust is the most serious disease of cowpea, and it often causes damage in summer and autumn and rainy seasons. In serious cases, the yield loss reaches about 50%. Symptoms mainly affect the leaves, petioles, stalks and pods sometimes also develop. In the early stage, many small yellow-white spots were formed on the back of the leaves, and the micro-uplifts expanded into red-brown sores, which was called the uredia spores heap. With a halo, a reddish-brown powder is scattered after the plaque has ruptured, and a green spot appears on the front of the leaf at the lesion. The urediaspores of the veins and stems are strips or subrounded. Late-stage plant growth produces black sores in the diseased area, which is a teliospore heap containing black powder. Control methods 1 Strengthen the cultivation and management to implement crop rotation, rational distribution, isolation of spring and autumn cowpea, tightening varieties and sowing date, so that the harvest season avoids the rainy season, and after the harvest, clean the garden and other measures can reduce the incidence. 2 In the early stage of the disease prevention and control, the following agents are sprayed: 25% Triadimefon 2000-3000 times, 50% Versatrol EC 800-1000 times, 2.5% enemy demulsifier 4000 times, 50% Carbendazim Wet powder 500 times, 40% rivasone ketone wettable powder 4000 times, 50% sulfur suspension 200-300 times. The spray is usually sprayed for 7-10 days, in which the dosage of triadimefon, amizodone, and enemy force is delayed to 15 days. Portable 3 Ply Disposable Masks Non-woven Face Mask With Elastic Earloops Disposable Surgical Face Mask Dongguan Anmeixuan Electronic Technology Co., Ltd , https://www.hyashine.com