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By Snape

United Kingdom Gb

I have a jostaberry in its second year. Some leaves have a brown powdery in appearance thread like discoloration (not powder as it does not rub off) and a lesser number have lumps



the jostaberry is supposed to be resistant to most of the common blackcurrant diseases but this sounds a little as if it could be blackcurrant leaf spot or a gall mite. As the Josta berry is so vigorous I'd be surprised if it can't overcome whatever is affected it. If it's just a few leaves, I'd remove them and burn them to dispose of whatever pest is there. Is the plant well fed and on good soil?

21 Jun, 2010


Many thanks for your help. Soil pretty good and has been fed.

22 Jun, 2010

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