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I bought Shropshire Lad from David Austin Roses 3 (going on 4) years ago. It has always been reliable & healthy. Recently, it has succumbed to black spot which I have been spraying with suitable substance, but today I noticed that it seemed to be sprouting red stems from the root and also further up the main stem. I have taken off all these stems as they were unlike the normal stems on this rose. Now I have just discovered one leaf folded over quite tightly - I unfurled it and found white grubs? that look like tiny flecks of paper and also 2 flies with orange/yellow bodies and brown/black wings - never seen their like before.
Anyone had a similar experience/any advice please?
The folded leaf is a way that butterfly and moth caterpillars have to prevent birds finding them and eating them. They do a bit of damage but a mature rose is able to withstand that sort of thing.
The flies might be a type of hoverfly or a type of drone fly - it's almost impossible to say without a photo and a description of their size. If they are hoverflies or drone flies they are goodies.
..I'm afraid you've most likely cut off good flowering wood by removing those red stems... they are usually different from the main growth until they mature...and blend in....
...I saw a Princess Alexandra of Kent planted at a garden centre border today, covered in black spot.... obviously a bad year for this for some people...
Thanks everyone for your help and advice. I have bought Roseclear 4 which seems to be the fungicide of choice for the blackspot. Hopefully, it will recover - it is a strong plant and I shall be more vigilant in future.
Sylvia, do the following, remove all the affected leaves and any on the ground and any detritus. Spray the whole plant with fungicide including any flowers, also spray the ground around the rose. Mulch heavily, feed and water well. It may look a bit bare in places, but this method does work, any affected regrowth remove and spray again.
It's been a bad year for black spot as we had little or no frost and even the disease resistant roses have been affected.