Leaves show irregular purple blotches on Downy mildew disease. Older leaves show regularly shaped black Black spot disease. Young leaves covered in grey white felt. Buds, pruning cuts developed furry grey Botrytis infection. All leaves show orange or black Rust disease.
Older leaves show white spots and Red spider mite.
Small pink or green insects clustered on buds. Younger leaves and shoots become Iron Chlorosis, reduce completely yellow. Young shoots become yellowish bronze, Manganese toxicity - growth restricted. Leaves show scorched brown margins. Either soil toxicity or atmospheric pollution from sulphur or other gasses, ammonia fumes from use of a mulch of fresh horse or fowl manure.