Topdressing phosphorus, potassium and calcium fertilizers will benefit Mei Jia, thus avoiding the use of incomplete decomposed soil miscellaneous fertilizers. Spraying prochloraz (450g/L emulsion in water) 2000 times, carbendazim 600 times and streptomycin sulfate for prevention and control, once every 1 day, 2-3 times.
The seedlings are sprayed with chemicals first, after 3-4 days, the branches are picked, and the nursery is sprayed with Bordeaux solution, and the chemicals are sprayed every 10- 15 days, ***2-3 times.