How to treat the new leaves of mango when they grow like this?

Hello! Mango anthracnose, I suggest you give priority to prevention! After the occurrence, 30ml of 40% benzalkonium chloride prochloraz, or10ml of 22.5% picoxystrobin, or 5g of 75% tebuconazole oxime, or 20g of 42% biguanide prochloraz, or15ml of 20% pyraclostrobin dicyanoanthraquinone, etc. It should be sprayed alternately for prevention and control! Add brassinolide, once every 5-7 days, twice in a row, the effect is better!