Marlorena is our mb rose expert. I'd hedge my bets she is right. Even if it dosent look obvious. I've had both common and rose sawfly and my roses didn't look like yours. However I've been gardening for less than 15 years and less than 10 with roses. I would always go with the expert advice
Jason, thanks for your input. I appreciate everything that has been said, but I am inclined to go with the advice of dovefromabove in this instance. He is bang on when he says we have a sheltered garden, and that the heat in May would have burned any young foliage, which is exactly what it looks like; the leave look like someone has taken a blowtorch to them. We also live in an area that is very open to the wind across the Wessex Downs and that could also have led to the leaves drying out as they have. On the roses that have not been badly affected, we keep checking for sawfly and as yet we haven't found any at all. However, we will keep checking and if we find sawfly then I will come back on this forum and say so and happily eat humble pie.
Sorry.. that is not wind damage.. I live in Fenland, I doubt you get anything like the wind I get here... neither is it sun damage, we did not get any 'heat' in May, heat for roses which can cause problems with blooms and foliage is in the region of 95-100F and above... 70-75F is not heat...it's just mild... we did have a semi-drought though, in my area at least, with no rain for 2 months...
As far as I know, neither myself nor anyone else here is a plant pathologist, so we can only make a calculated guess from personal experience of growing roses, or what we see online and from the photos you supply and information you give... the RHS used to do a service that if you sent them material, they could investigate it for you, but that probably isn't available at the moment..
As far as I'm concerned you've had a severe infestation of rose slug damage, but if you think it's something else, then of course you are welcome to run with whatever advice you choose but I doubt you will be satisfied with a definitive answer... so let's hope your roses improve in due course, and you get some more lovely blooms as the season progresses.. pollen beetles are all over mine at the moment..
Marlorena, many thanks for the detailed information. I have to say that the roses are continuing to bloom, and where we are getting new growth the leaves seem okay so far. It will be interesting to see how they cope over the coming days, with temperatures here expected to hit 32-33C. As for the wind, well we sit just below the Ridgeway on the fringes of the Wessex Downs, and the wind is a constant factor here, along with the chalk dust that is carried by the wind. The only other factor I can think of is that we sit on a development to abuts a large agricultural farm and I am not sure if the farmer has been spraying his crops recently -- he has certainly been using a fertilizer of sorts, the smell is testament to that!
I know what you mean, I also live next to agricultural land, and every year I lose something to spraying... however in your case I would expect other plants to be affected close by.. yours seems quite localised... I have to admit I've never seen damage quite as bad on a rose as what you have there... a few leaves here and there can be expected sometimes.. The Ridgeway is such a beautiful area, lovely for walking... been that way many times.. you're very lucky to live so close.. do update later as to how well your roses recover..
As far as I know, neither myself nor anyone else here is a plant
pathologist, so we can only make a calculated guess from personal
experience of growing roses, or what we see online and from the photos
you supply and information you give... the RHS used to do a service
that if you sent them material, they could investigate it for you, but
that probably isn't available at the moment..
I respect your comment.
I am a plant pathologist. Not practicing. I'm retired.
As far as I am aware, having been a Fell/Member since the 1960's. Yes the RHS do accept samples etc and will give a response.
In retrospect. Consultations, help and advice etc. Even in the wider world. Consultants, and GP's ofeten get things wrong. So who are we, in the humble world of amateure gardeners to to take it upon ourselves to postulate.
IMO. I consider Dovefromabove as having given a substantially good reply.
Even the best of photos don't always provide the best evidence.
Yes I am not ashamed to admit. I also have missed the mark. Perhaps, when dealing with other members of the fraternity. We might, pause. Take a breath and think.
It probably wasn’t that warm in Fenland Norfolk in May ... the winds there blow straight from the Urals ... however in a sheltered garden south-west of Norwich we recorded 28.4C (83.2F) in the shade on a day in May ... goodness knows what the temp in the sun was ... enough to scorch newly unfurled young leaves which had not developed a protective pellicle/cuticle layer I’m sure. It certainly frazzled my nasturtiums’ newest leaves.
😊
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
As someone from continental Europe originally, I don't see 28 in May as high. May is often the first hot month and high temperatures can come quickly... lower tens one week and lower thirties a week after. Sometimes even snow of night frost in late April/early May and then high temperatures. I have never seen this type of damage from these temperature swings.
I have only been growing roses here in Northern Spain for 4 years, temps can be mid 30s in May, frost at night, southerly hot winds blow up from the Sahara, cold ones from the Pyrenees or Siberia, monsoon rain, you name it. My climate is unpredictable in the extreme. I had lots of new growth on newly planted out roses from early May, but, like edhelka, never seen any such weather damage. I do however, have a major invasion of rose slugs (the tiny green ones that feed from underneath) but it looked nothing like your damage, just lots of obvious holes and papery membranes. Pesticide damage looks feasible, but why are the surrounding plants so green and healthy?
Im sorry your roses are so decimated/desiccated. Its a real mystery, please let us know if you get to the bottom of it!
Mountainous Northern Catalunya, Spain. Hot summers, cold winters.
If I may. Perhaps generally speaking. If and when shall we say, a gardening problem arises. We so often tend to, as it were. Tot up the recent days, period of whatever kind of weather conditions we have experienced. And aportion our answers to that.
Weather conditions do play an important part, but it's upto us individuals to, as it were. Come clean. Self scrutiny. Is this down to the weathe etc. or, now head held low. Might I have been a wee bit too generous with thw chemical feeding etc?
Please. If I may. First reading this thread. What struck me was, as the photo provided evidence. A whole. total clump was exhibiting identical signs. Mow. Please bare with me. Vital and bacterial infections are proven to be. Hit and miss. Reports often show that a plant, shrub has been attacked on one side only. point worth noting. Then I see. ( using my former police detective powers. This total stand of plants is identcally affected. Hence my deduction. This is chemical problem.
Posts
Marlorena is our mb rose expert. I'd hedge my bets she is right. Even if it dosent look obvious. I've had both common and rose sawfly and my roses didn't look like yours. However I've been gardening for less than 15 years and less than 10 with roses. I would always go with the expert advice
As far as I know, neither myself nor anyone else here is a plant pathologist, so we can only make a calculated guess from personal experience of growing roses, or what we see online and from the photos you supply and information you give... the RHS used to do a service that if you sent them material, they could investigate it for you, but that probably isn't available at the moment..
As far as I'm concerned you've had a severe infestation of rose slug damage, but if you think it's something else, then of course you are welcome to run with whatever advice you choose but I doubt you will be satisfied with a definitive answer... so let's hope your roses improve in due course, and you get some more lovely blooms as the season progresses.. pollen beetles are all over mine at the moment..
The Ridgeway is such a beautiful area, lovely for walking... been that way many times.. you're very lucky to live so close.. do update later as to how well your roses recover..
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.