If you have rose bushes, fungal diseases such as black spot and mildew can be prevented, but not cured. Spray a fungicide every 7 to 10 days as a preventative measure.
By Terri H.
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Listerine works great for this...buy the generic for more frugal solution..get original flavor.
I have also heard it is very important to remove any leaves from beneath the rosebushes, that may have fallen in autumn etc, to stop the fungus from going through the bushes that way.
Diamondee, Do you use full strength "listerine" or do you dilute it?
I have also heard that tea tree oil works well for fungus on plants. I'm not sure about the quantities, but dilute maybe twenty drops per gallon of water, put in a spray bottle, shake well, and spray away. Doing the same with citronella oil also works for many plant pests. A combo of the two oils might be a good overall cure and even preventive measure (spraying once a week in warm months) for problem plants, both indoors and out.
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