Tea cake disease mainly harms the buds, leaves and stems of tea trees. Light green or light yellow round or oval transparent spots appear after the young leaves are damaged, and the back of the leaves protrudes like a cake, which is easy to distinguish. The protruding part of the back of the leaf is covered with a layer of white powder. The control can be selected from tebuconazole-propineb compound or triadimefon-myclobutanil compound or difenoconazole-bromothalonil compound or difenoconazole-oxime ester compound. However, people who have been infected with tea cake disease cannot be cured, and the formation of "white spots" cannot be eliminated. The purpose of spraying medicine is to protect those who are not infected and new shoots.