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Initial post
25 JUN 22 by
Mihnea
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I have this 3 years old Wollerton Old Hall. This year I have noticed this discoloration on some of the leaves - perhaps 5% of all the leaves are affected, no more, clustered on only 2 or 3 of the main canes. I cannot be sure if this is the very first time the discoloration has appeared, but, if it did appear in past years, it must have done so on even fewer leaves.
I did search for possible issues and to me it seems that the only good fit would be Rose Mosaic Virus.
Please give me your opinions.
Also, I have found what seem to be reliable sources claiming Mosaic does not spread from one rose to the next, and equally reliable sources claiming the opposite. Would love your thoughts on this too.
Cheers!
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I won't claim to be an expert, but in my opinion that is not rose mosaic virus. It could be from some insect or mite damage (like sawfly larvae) or a slight nutrient imbalance in your soil (calcium, sulfur and magnesium not in the proper balance?).
Rose mosaic virus cannot spread to another plant like blackspot and other fungal diseases. If it's a virus, it WOULD spread to other plants via reproduction. Assuming it is a virus, if you root cuttings from the virused plant then they too will have the virus. If you take a bud eye from the virus plant and bud it to a rootstock that new plant would also have the virus. But the virus cannot spread to other roses in your garden, I am quite sure on that.
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I was told by a horticulture PhD student that mosaic virus can be transmitted from the roots of a rose to those of one immediately adjacent to them. I have trouble believing it but it's not my field of expertise.
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That's defintiely true Margaret. The virus is transferred via root grafting.
I've seen this happen under field conditions.
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So I was right to pull out the roses next to an affected one - it hurt at the time.
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Initial post
24 JUN 22 by
Mihnea
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I planted two Darlow's Enigma last August and they have been developing well in my alkaline soil, in full sun. There's scent and they do bloom continuously.
And given all the good that's being reported about this rose, I have a mind to allow my pair to develop freely aside from fertilizing and mulching them in spring. I would want to avoid even deadheading them, to allow them to set hips.
Would be great to have your opinions however, especially if anyone regretted not giving their DE bush a structure by pruning it at least in the first few years.
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Initial post
11 JUN 22 by
Mihnea
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Thank you for following-up year after year! Your photos helped me make up my mind and last year I planted two Darlow’s Enigma of my own.
I have a mind to allow them to develop freely aside from fertilizing and mulching them in spring. I would want to avoid even deadheading them. Do you prune your gorgeous DE at all?
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