Black spots; spreading fast!

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newbiblumen Grandview, TX Jul 31, 2007

I have 3 seedless mulberry trees and some rose bushes which all have black spots on their leaves. These spots seem to be spreading throughout my inner yard. All three of my trees look as though it is fall, as they have lost most of thier leaves.
I am hoping that someone can advise me as to save my trees and roses!
Please help,
Crystal

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ecrane3 Dublin, CA(Zone 9a) Jul 31, 2007

It's probably black spot, I don't think it usually kills the things that get it--at my old house I had a crabapple that got it every year, and I know some roses are prone to getting it every year as well. The trick is to make sure and clean up all the diseased leaves off the ground when they fall, otherwise they will re-infect the plants next year. And then next year spray with fungicide before you start to see spots--once the spots are there I don't think the fungicide really does much.

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vickijackson55 Vancouver, WA(Zone 8a) Jul 31, 2007

I have a rose bush, Dr Huey, prone to black spot and live in the Pacific NW. When I moved into this house the rose bush was in horrible condition. I pulled every leaf and bud off that had any black spot on them, was careful not to drop any on the ground, and sterilized the tools I used. That left me with 4 leaves. It was ugly for a short time, but worth the trouble. I do a regular maintenance with a fungicide, because we are so damp here, it is a regular problem, with some species more than others.

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planolinda Plano, TX Jul 31, 2007

newbiblumen--i also live in texas and i think the problem is because of our wet season--at one time our red tip photinias all had the black spots and lost leaves--it was because they got too much water--the next year they were fine again--i read or heard somewhere that the fungicide is not needed and i think that is because in texas we will get very hot and dry again --i guess the fungicide would be used more in damp climates--

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carrieebryan Midland, WA(Zone 8a) Jul 31, 2007

If you don't want the mess of removing black spotted leaves from the roses and not letting them overwinter in the soil and discarding them in landfill instead of compost heap and all that, look into getting roses that are resistant to it. Rules of thumb: roses with China ancestry are susceptible. Roses with any yellow coloring in the petals are susceptible. Roses that bloom all summer long are susceptible. Of course there are exceptions. We're having an unusually damp and cool year and of my 3 rose bushes, the 2 with yellow in the petals have black spot. My pink rose, 'Applejack', is a Rosa eglanteria hybrid with no China rose ancestry whatsoever. It has no black spot whatsoever, even though 'Dr. Eckener', a rugosa hybrid (& theoretically resistant) entwined with it, is full of it.

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