Excuse me, what specific medicine is used to prevent watermelon? Thank you for your answers! Leaf blight, angular leaf spot and anthracnose!

Watermelon leaf blight. Use 800 times 80% mancozeb or 600 times 70% propineb or 1000 times 30% tebuconazole carbendazim or 800 times 77% Keith Downing or 600 times 66% Tong Jia or 1:2:200 times bordeaux mixture for control, and foliate every 7~ 10 days. Watermelon anthracnose. Use difenoconazole, copper thiamethoxam, copper thiamethoxam, prochloraz, pyraclostrobin, zineb or propineb for control. Watermelon angular leaf spot is a disease caused by bacterial infection. It is treated with Zhongshengmycin, ethylicin, polyoxin, agricultural streptomycin or octyl acetate, or chlorobromoisocyanuric acid, or cuprammonium chlorate, or cuprclothianidin, or cuprTai Sen, or cuprquinoline, or copper hydroxide, or cuproxychloride, or metalaxyl, or cuprammonium, or cuprrosin.