Blackspot on tree rose

15 years ago

Hi I have 2 rose trees called "Cinderella Tree Rose". They are in pots. They both have blackspot. I have been spraying them 3x a week for the past 3 weeks to control it. I have been removing leaves and blooms as the fungus spreads. I have been careful to remove infected petals and leaves from the surrounding soil. Now I am left with 1 bloom on one bush and 5 on the other that haven't opened yet. I see new leaves forming on the branches already. Is there anything else I can do to prevent the fungus from coming back and spreading to the new growth?

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Comments (4)

rosetom
15 years ago
You didn't state what you've been using as a spray. That's got to be the problem, because there is ample availability of sprays these days that can stop BS in its tracks.
rosetom
15 years ago
BTW, it's been proven in tests that removing infected leaves has no effect on the spread of BS. Or, to be more specific, "splashing" up from contagion on the ground has no effect. BS is airborne and that is the primary mode of infection.
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Naturalchick27
Original Author
15 years ago
Hi thank you for your reply. I have been spraying Bayer Advanced Natria Disease Control. Do you have suggestions for a better product?
rosetom
15 years ago
I'm sorry, I guess I'll get flamed out of the forum on this one, but Natria is politically-correct junk.

You should be using Bayer Advanced Disease Control (active ingredients = Tebuconazole).