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| Hey all,
New gardener here! Just moved into a new home and now that spring is here I'm getting acquainted with my garden! I have about 5 different types of roses back there that I'd love to learn to care for. (I just posted some pics of the roses in my new backyard if anyone is interested in helping me ID them.) My father in law did prune them down in November or something but I have no idea how great of a job he did.
So far, the roses have had lovely growth all on their own, which is surprising considering that the garden has been pretty much abandoned for about a year. I'm seeing this now though, and I'm assuming this is rust? What do I do? Do I pick off the affected foliage? Do I have to start spraying? As you can see, these particular roses are planted under a grape vine (not sure how great of an idea that was) and have woodland strawberries growing at the base, so I hesitate to spray chemicals.
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Follow-Up Postings:
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- Posted by jacqueline3 9CA (My Page) on Wed, May 9, 12 at 17:55
| Can't tell from these pics. Actually, I don't see much wrong at all. However, if you have rust it is unmistakable. On the BACK of the leaves you would see lots of little rust colored spots - all over the leaf. When disturbed, the rust turns into rust dust and floats on the air - the better to spread! If you ever do have rust, the normal way to deal with it is to carefully pick off the affected leaves (I hold a grocery bag under them to catch the rust dust, and immediately put the leaves in the bag). Then, you could spray with a fungicide if you want. That only works on uninfected growth, however. Here in No Cal this is usually a problem only in the Spring. The hot & dry weather later on gets rid of it. Jackie |
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| There appear to be a few yellowing leaves with dark spots. If you pick these off and take a sharp picture on a flat surface, we may be able to give you a diagnosis. But it doesn't look like a significant problem. In California, spot diseases as well as rust tend to go away during the dry summers. |
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| Darn, I don't want to be my usual contrary self, but. Here, just about 30 miles north of where I think Jackie gardens, I get rust only at the very end of the summer season when it is the hottest and the dryest.... Go figger.... I have to agree that the rose you pictures looks very healthy and happy. If you want to see rust, check out this picture By the way, in the following season and now in yet another, this rose is healthy and thriving. |
Here is a link that might be useful: Rust on Everest Double Fragrance
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| Downy Mildew, I think. Rust looks like the stuff that gets on your fingers if you eat Nacho Cheese Doritos. |
Here is a link that might be useful: downy mildew images
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- Posted by melissa_thefarm NItaly (My Page) on Fri, May 11, 12 at 15:31
| Those spots don't look like anything to worry about to me (though I would listen to people who garden in your zone, which I don't). A lot of roses get a bit of fungal disease on old leaves that are about to die anyway. About maintenance, an inch or two of organic mulch, not touching the canes of the roses, is always good. Make sure water can penetrate it. Not everybody sprays their roses; I don't. If the varieties look basically happy, there's no need for chemical intervention. In my own garden I've had the (mildly mortifying) experience of seeing roses I did nothing to growing better than roses I had rather fussed over; keep in mind the possibility that your roses actually benefited from a period of neglect. Obviously this is the minimalist approach to growing roses. But it can work quite well. Good luck! Melissa |
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- Posted by DandyLioness none (My Page) on Wed, May 16, 12 at 18:25
| So just an update... the affected area has spread to other areas of the plant and there is a "doritos" type orange powder on the back. So, what do I do?? Should I cut off the affected leaves? Will the rust spread to the nearby grape vine and wild strawberries below? Does rust only live one season? |
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| If it is 'Doritos Orange' it is rust. Remove affected leaves. If the spots are DARK, you may have some blackspot or downy mildew, but we would have to SEE the leaves to tell. Do you have a flatbed scanner? If you do, put the leaves in there, and scan them, and save as jpgs. Rust is a fungal disease which can be a problem in California. Some roses will rust here in ALL seasons, tho getting additional water MAY help. Any rose that rusts right through the season, I remove, because it is not worth the hassle. That said, this has been a very bad spring, and fungal diseases of all sorts are on the rise. I came home from three weeks of travel to find that I have an unusual amount of blackspot. That will go away here when, inevitably, the weather becomes warmer and drier. When I say this has been an unusually bad spring, I am saying that I would not panic and remove a rose that has not rusted in the past. But if a rose CONTINUES to rust, to the point of requiring regular spraying, I would not keep it. There are too many GOOD roses, that do NOT rust, to waste time and effort on those that do. Jeri |
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| You mentioned fertilizing and I've had quite good results with alfalfa meal. I don't use any chemicals at all, although I've had rust, mild and blackspot to a greater degree than ever before this spring. It seems to be abating now that it's warmer, though. For my climate some of the older roses really do best, and grow into big, handsome bushes with lots of bloom. The roses I have most of are tea roses (not hybrid teas) and they're wonderful. Of the moderate roses I prefer the David Austin roses because they also have those lovely, old fashioned blooms and will grow into large shrubs. Ingrid |
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- Posted by hosenemesis SoCal Sunset 19 USDA (My Page) on Thu, May 17, 12 at 3:01
| I just pick off the rusty leaves and rake up under the bushes. Then I put a new layer of compost down. If it keeps spreading to new leaves, you can use a fungicide like Immunox, but that will only protect the healthy leaves. Renee |
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