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I got better pics!

16 years ago

Here are the sharper pictures. The easy elegance rose has actually deteriorated throughout the day (many more leaves yellowed).

Depending on the diagnosis should I prune out infected foilage? Should I just spray and remove foilage once it drops?

Easy Elegance - Blackspot?

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Flower Carpet - Blackspot?

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Comments (12)

  • 16 years ago

    The second photo is blackspot. The first photo is blackspot and maybe something else. Blackspot doesn't usually create those holes like you have in picture one, at least not in my Florida blackspot heaven garden.

  • 16 years ago

    The first pic looks like something I had a few weeks ago on one of my roses, I never seen anything like it before and it threw me off a bit, everyone here helped me when I posted some pics and I sprayed with Bayer Adv. Diseased Control and it seem to get it under control, also it was in a pot so I was able to move it to a spot with more sun and that also helped. The second pic looks like blackspot for sure.
    That is such a shame, are not these roses suppose to be diseased free?

  • 16 years ago

    Could be blackspot. I would remove all the affected leaves and use a fungicide.

  • 16 years ago

    Is your problem frost damage?

  • 16 years ago

    You tell me, lol.

    I doubt it, shrub roses are fairly tolerant of frost.

    When I read remove the leaves, does that mean pick the leaves or prune out the stems with the effected foilage?

    What if I just spray and remove leaves as they drop?

    Hoping to act fast as today was a wet and cloudy day...yesterday maybe 1/8 of the leaves were yellow, now 1/3 of the leaves are yellow.

    Here is a link that might be useful: I have this product that I can apply in the morning

  • 16 years ago

    When I am being good and not lazy I pick off every spotted leaf and leave the canes. If you let the leaves drop they may sit on the ground for a while and spread nasty spores. Also they are kinda hard to pick off the ground once they turn brown and dry.

  • 16 years ago

    I'll probably pick the yellow leaves then as I know those are ready to fall. Remember I have 6 bushes with 100's of leaves that are infected.

    So leave the canes then??

    Also come late fall should I cut the roses back, clean them up and use a dormant spray? This is not typical for my area as we prune back in late winter/early spring.

    All the roses that the rabbits ate over winter don't have leaf diseases but all of them had black canes at some point that I cut back in spring/now.

  • 16 years ago

    Here is what I do (understand I'm in a different zone). As soon as there is a hard frost, I top my roses. That means I cut down any really long canes to about 3-4 feet. This serves two purposes, it prevents these long canes from blowing around in winter storms and possible breaking off, and it neatens up the yard since there will be no more leaves/blooms.

    Then sometime in January/Feb I do a dormant spray of lime sulphur.

    Then in early spring, I do the full pruning. Remove all dead canes and bring most down to about 2 feet. I would also remove any remaining leaves at this point since they would be from last year and would be more susceptible to disease.

    Then as soon as the roses leaf out with new leaves, I begin my regular spraying cycle, every 2 weeks with the Bayer Advanced disease control.

  • 16 years ago

    That much yellow--is there a drainage problem? Leaves already weakened by too much water might very well be more susceptible to various diseases and problems.

    Just a thought.

    Kate

  • 16 years ago

    Clip off the spotted leaves and spray with the chlorothalonil product. Repeat in a week. Be sure the plants are hydrated before spraying in the morning.

    A lot of that is spot anthracnose and some of it is probably blackspot, but the picture is still not very clear. If you do an image search for rose black-spot (include the hyphen) you will see what I mean by fringy, sometimes notchy, borders on the spots. There are different degrees of fringiness, but it is diagnostic.

    If this problem recurs, you might want to switch out either to something more resistant in your climate or to a more interesting rose.

  • 16 years ago

    I guess I'll trim, pick and spray. The drainage should be ok...I offically found the same thing on my White Meidiland roses as well.

    Seriously? How can all these roses in different spots get this disease?

    Not a good start for my second year with roses, lol.

  • 16 years ago

    I can see the fringed margins, so there is BS, but there are other things. On the first picture I believe these thransparent spots are the the rose slugs damage.
    Easy Elegance does get BS here, so there is nothing to be surprised. BS resistant doesn't mean immune. When conditions are right, you will get BS.
    You can use Bayer fungicide and spray. I don't think leaves removal will make much difference. At least it never made a difference for me. Rose slugs should be mostly gone by now.
    Olga

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