Questions, Answers and Comments by Category
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Several leaves of my "City of york" look strange. In spite of this the plant looks healthy. Nevertheless i'm afraid it is a bad sign, maybe the mosaic virus?
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It could be either a rhabdovirus or herbicide damage. If you have leaves with interveinal chorosis as well, that might suggest a nutrient deficiency.
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Many thanks for the answer. Herbicide damage cannot be because I don't use anyone. What is very strange is that the veines are yellow and not the interveinal regions as with chlorosis. I will have to wait and see.
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This site has good information on the effects of various nutrient deficiencies on rose leaves. We all know what an iron deficiency (the interveinal chlorosis) looks like -- this site shows some of the other ones.
http://www.bhg.com/gardening/flowers/roses/solving-rose-nutrient-problems/
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