Brown spot is caused by the infection of grape pseudocystis. It mainly damages the leaves of the grape. When the leaves are infected, the leaves show brown spots. The later leaves cause dead leaves and fallen leaves. Recently, a grower in Weinan, Shaanxi Province consulted for the prevention and control of brown spot disease in grapes. For this reason, the reporter interviewed Zhang Zongqin, an associate professor at the College of Forestry of Northwest Agriculture and Forestry University. Strengthen management, rational application of fertilizers to increase organic fertilizers, increase application of multi-element compound fertilizers, increase tree vigor, and increase tree disease resistance. Science pruning, timely picking, thinning, fruit thinning, keeping the orchard ventilated and clear, removing litter to reduce the source of the disease, concentrated burning, spray 3 to 5 degrees lime sulfur before germination to reduce the original bacteria. In areas with severe disease control and spraying combined with other disease prevention and control, one can spray 200 times Bordeaux mixture in equal quantity in June, and spray 40% triadimefon carbendazim wet powder in 1000-1500 times from July to September. 600 to 800 times the chlorothalonil or 800 to 1000 times 70% thiophanate used alternately every 10 to 15 days to spray 1 drug. 65% of mancozeb has phytotoxicity on certain grape fruits, more obvious in the north, and the use concentration should be 1000-1200 times. Steroids Oil,Test E,Test C,Test P Shaanxi Hongbaiyi Biotech Co., Ltd. , https://www.sxhongbaiyi.com