Roses HELPPPPPPP!!!
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I don't grow roses myself, but I thought maybe this link might help... sounds like it could be a fungus. 
http://www.rosemagazine.com/articles02/ ... ckspot.asp |
| Sounds like blight..... I would take some of the leaves to your local garden store (Agway etc) they should be able to help. Minature roses are quite difficult!!! |
| Nope- that is the infamous fungal disease BLACK SPOT! It's a famous defoliater here in MN, and in other parts of the country too.
Unfortunately, there is no way to "save" a leaf once it has contracted the disease. All you can do is keep it from spreading. Go to your garden senter, and buy a spray that specifally says on the back that it targets black spot. Spray the top and undersides of all the leaves with the spray on a calm day (when there is no rain in the forecast). Continue to spray once every 3-4 weeks. Make sure you pick up and throw away or burn any diseased foliage that the plant drops... this is one of the ways it spreads. As for prevention, there is not a ton you can do. The average advice I've gotten is plant your roses is open areas, uncrowded by other plants so they get plenty of air circulation. Keep any dead leaves picked up, spray regularly, if you choose not to spray, try to plant bushes that are less disease prone in your area. My roses tend to get BS later in the season, but by then it is not a big deal if they defoliate a little, as they've grown all they need to! Thsi early int he season though, I'd spray and clean up your bushes as well as you can. As for any bushes that have totally defoliated... here is a little trick that always worked for my minis: IF (and that is a big if) you canes are still green, clip them back alittle with your pruners to just above a leaf node- about 1/3 down on each cane is a good length. Your plants have basically oput themselves into dormancy, loosing all their leaves, but if your lightly prune back good live cane, and keep them watered (not soggy though!) they should wake back up! they still have plenty of time to put on growth for the season, and you'll get your roses back. THEN SPRAY!!!! when you see the baby leaves starting to unfurl, spray them with your fungicide, and keep at it once a month. this should help keep the black spot at aby, while they get healthy again. Luckily, the fungus lives in the leaves, not the stems, so any baby leaves will be perfectly healthy, and you can protect them right away! AAHHHH PHEW!!! hope i didn't overwhelm you! Feel free to ask questions  |
OH thank you thank you Iriskmj. I was thinking I would have to get rid of the rest of them. I'll keep you updated. We have a great greenhouse here "Ashcombes" I'll take some leaves there and get the right stuff!!!! They were so beautiful last year   |
| Probably is black spot or anthracnose. Fungicides prevent spreading, they don't cure.
Another thought is spider mites. Granted the black spots scream Black Spot, but sometimes spider mites can cause similar discoloring.........and minis are very prone to spider mites. |
| OOOHHHH NOOOOO not Black spot!!!! |
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