Roses forum: New deformed leaves

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Name: Rosemary
Sacramento, CA (Zone 9b)
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reh0622
Feb 26, 2020 12:25 PM CST
Hi--Does anyone know what causes new leaves to stick together and not want to open and when they do, they are deformed? I don't see any bugs anywhere. This condition is present on two of my roses. The new leaves are mostly green, and not red like some new leaves. Anything I can do to stop or prevent this? is it serious? I've never really noticed this before. Thank you!
[Last edited by reh0622 - Feb 26, 2020 12:26 PM (+)]
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Name: seil
St Clair Shores, MI (Zone 6a)
Roses Garden Photography Region: Michigan
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seilMI
Feb 26, 2020 12:50 PM CST
Pictures would be really helpful, Rosemary
Name: Rosemary
Sacramento, CA (Zone 9b)
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reh0622
Feb 26, 2020 1:25 PM CST
Seil, as they say, a picture is worth a thousand words! A couple more mature leaves have some white raised bumps on them. Thank You!
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Name: Carol
Alberta, Canada (Zone 3b)
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Canadian_Rose
Feb 26, 2020 2:19 PM CST
Hmmmmm....could you retake the first picture? It's pretty blurry.
Zone 9, Sunset Zone 9 (Zone 9b)
Roses
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Mustbnuts
Feb 26, 2020 2:32 PM CST
Especially those white bumps which could be scale. A close up would be great. Have you recently sprayed anything?
Name: Rosemary
Sacramento, CA (Zone 9b)
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reh0622
Feb 26, 2020 7:02 PM CST
No,, Mustbnuts, but it looks like maybe I should have.
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Hopefully, these will be less blurry.
SoCal (Zone 10a)
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SoCalGardenNut
Feb 26, 2020 8:36 PM CST
Maybe chilli thrips.
Name: Rema
Montreal (Zone 5b)
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Rema
Feb 27, 2020 8:55 AM CST
Reh0622
Rose is sitting in a pot. I think it's disadvantage MINERAL ! (not organic) nutrition. Make a rose shower with mineral fertilizer. in low concentration, because there are not a lot of leaves on it. Is it possible to plant it in the soil? Then you can use organic.
You have zone 9. Is it warm at nights in California now? I have such deformed upper leaves appear after cold nights (+ 3 + 5´C) It's passes by itself when normal summer temperatures are set.
It can be added that deformation of the upper leaves and such color spots can be the first signs of downy mildew which arises again due to cold nights.
[Last edited by Rema - Feb 27, 2020 9:08 AM (+)]
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Name: Rema
Montreal (Zone 5b)
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Rema
Feb 27, 2020 8:57 AM CST
Guys !!!!! I am sorry if there are a lot of mistakes in my text. I don't speak English and I write through a translator but I really love roses and the people who grow them.
Name: Rema
Montreal (Zone 5b)
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Rema
Feb 27, 2020 9:06 AM CST
Summer will come in Montreal also !!!

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[Last edited by Rema - Feb 27, 2020 9:58 AM (+)]
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Name: Rosemary
Sacramento, CA (Zone 9b)
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reh0622
Feb 27, 2020 9:43 AM CST
Thank you, Rema. I am open to all suggestions. The deformed leaves are on two rose plants--a 'Peace" tree rose, in ground, on which I have never noticed such a condition before, and as you noted, in a pot, "Smooth Lady" which I purchased from Russian River Rose Company in Healdsburg, last fall. Both had normal-looking leaves and flowers last fall, and so far none of the other of rose leaves on my other plants show that deformity. BTW, you do well for English not being your native language! I know most Quebecois are pretty much bi-lingual. When I lived in Montreal and attempted to practice my French I was studying with people I met there, they always answered me in English! Adding extra minerals is no problem as I have both rock phosphate powder and azomite on hand which I have used in vegetable gardening and with my fruit trees.

SoCal--Chili Thrips?!? I guess I'm going to have to pay more attention to the recent threads on that. I have seen the damage in pics of what they can do to the roses in bud, and I suspect them on Elina at the garden where I volunteer, but their foliage looks normal that's starting to leaf out, so guess I will have to investigate more.



Name: Rosemary
Sacramento, CA (Zone 9b)
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reh0622
Feb 28, 2020 12:36 PM CST
Noticed more on a couple other roses bushes today in the process of leafing out.. It almost reminds me of peach leaf curl, and it seems to be getting worse on new leaves emerging on the Peace Tree Rose. I tried taking a pic before, but it was too blurry to post. So it seems like it might be spreading, whatever it is.
Zone 9, Sunset Zone 9 (Zone 9b)
Roses
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Mustbnuts
Mar 1, 2020 7:21 AM CST
Rosemary, I don't know if there is going to be one answer for you. Several things can cause leaf curling. One is powdery mildew which can also cause white spots on the leaves. Another is an early attack of aphids which given our warm weather, could also be another culprit. Rose Midge can also cause curling but I don't know if you have that where you live. There is also a Rose-Leaf Curl virus which is not deadly, just unsightly. Do you see any black dots on your leaves? Thrips can also cause leaf curl and can leave black spots. Do you have any raspberry plants or other berry plants nearby? Raspberry Horntails can also cause this type of damage.

It also looks like in picture #1 that there is something green hanging off the underside of the leaf on the upper right area of the picture. Looks like a small caterpillar/worm to me? Hard to tell.

Given the small white spots and leaf curling, I might go with the powdery mildew especially given how our weather has been this past month. You may just have to wait and see what further develops. Sorry I can't give you a straight answer.
Name: Rosemary
Sacramento, CA (Zone 9b)
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reh0622
Mar 1, 2020 10:10 AM CST
Mustbnuts, thank you for your thoughts! It is more than I could find looking in my rose books or googling rose diseases, even from a UC site.

So far, I'm inclined to think that it's not powdery mildew-- my roses rarely have that, and if they do (on a few TJ miniatures only), there's no curling.

Every day, I'm seeing another bush with new leaves with it. Still haven't seen any sign of bugs, but I know some can be microscopic. Brand new growth emerging is becoming most deformed. I don't remember it in the past, but maybe I just wasn't paying attention.

I usually have aphids in April. I haven't seen any yet in our warmer than usual winter.

Name: Rosemary
Sacramento, CA (Zone 9b)
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reh0622
Mar 1, 2020 5:30 PM CST
Wonder what kind of insect makes perfectly round holes on rose leaves? And here is one of those leaf-footed plant bugs hanging out on my Iceberg tree rose! Yes, where I live, there are a lots of bugs!
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This one is Princess Anne. Sighing! Since a few other leaves have the curled and nibbled on the edge look, I wonder if it is the same cause, or something different. Thumbs down
[Last edited by reh0622 - Mar 1, 2020 5:32 PM (+)]
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Name: Porkpal
Richmond, TX
Charter ATP Member Dog Lover Cat Lover Keeper of Poultry Keeps Horses I was one of the first 300 contributors to the plant database!
Garden Ideas: Level 2 Plant Identifier Raises cows Roses Farmer Celebrating Gardening: 2015
porkpal
Mar 1, 2020 6:07 PM CST
Leaf cutter bees make round holes, but I've never seen them make one in the dead center of a leaf.
Porkpal
Name: Rosemary
Sacramento, CA (Zone 9b)
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reh0622
Mar 6, 2020 12:44 PM CST
Something definitely ravaged this leaf! I have found more with a hole, and had to remove some aphids yesterday from tender growth using water from the garden hose.
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SW Ohio River Valley (Zone 6b)
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vaporvac
Mar 6, 2020 1:42 PM CST
Ha! Rosemary and Rema, what a small world. I also studies and worked in Montreal for years! Your snow pic actually makes me a bit nostalgic! I miss it so much. I moved there from Belgium and had a hard time adjusting to the accent, but my Franco-American Aunt helped me out. Such great memories! I only wish I had paid more attention to the rose culture at the Montreal Botanic Garden. Rema, you are doing great and I totally understand the points you make so don't worry. People will ask if they're confused.
Name: Kat
Magnolia, Tx (Zone 9a)
Region: Texas Herbs Moon Gardener Enjoys or suffers hot summers Heirlooms
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kittriana
Mar 6, 2020 2:22 PM CST
Snails leave holes in the middle of leaves, chuckl. You CAN slow them with a very light sprinkle of self rising flour around the rose in a dry spot- the flour is the candy they love, and the yeast is the poison. I am 9a in Houston, our humidity is rough on fighting snails and slugs.
So many roads to take, choices to make, and laughs to share!
Name: Rosemary
Sacramento, CA (Zone 9b)
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reh0622
Mar 6, 2020 3:53 PM CST
Thanks Kat for your input and solution! So far I haven't seen any snails or slugs around my roses. Succulents is a different story, or even the leaves on my lemon and orange trees which get nibbled (along with the ripe Meyer lemons).

Never lived in Montreal in the winter, but I still got a dose of Canadian winters when I lived in Quebec near the Ontario border, .and in Wisconsin. Brrr, and slippery slide on the sidewalks and roads! I don't miss that kind of excitement!
[Last edited by reh0622 - Mar 6, 2020 4:55 PM (+)]
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