Roses

Where Can I Purchase Banner Maxx or Honor Guard


ibissonette added on March 19, 2012 | Answered

I want to use Banner Maxx or Honor Guard to prevent black spot on rose bushes.


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ANSWERS
Nikki
Certified GKH Gardening Expert
Answered on March 20, 2012

For black spot on roses, our rose expert here recommends a product called Mancozeb, which is available at http://www.rosemania.com, It will leave a yellowish powdery residue on the foliage for a while, but that is part of how it works. You may need to spray again in 7 to 10 days to be sure you get the black spot stopped, as the black spots never really go away but the fungus is dead. New foliage will grow back once the black spot is under control. Here is more information: https://www.gardeningknowhow.com/ornamental/flowers/roses/black-spot-roses.htm

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