Re: Rosa glamis castle
Kathy N
Hi, Georgiana,
From what you described, it sounds like your rose has bud blight caused by the fungus Botrytis cinerea. Cut out and destroy all infected parts. Prune the plant so it has good ventilation and air circulation. Apply a preventative spray next spring. If you also notice black spots on the leaves, this is a separate disease - rose black spot. In that case, remove and destroy all infected leaves, including those on the ground. After this you can apply a preventative treatment - either sulfur dust, a chemical fungicide (the most toxic option) or you can make a baking soda spray - 1 tablespoon of baking soda with a few drops of washing up liquid in a gallon of water. Spray this one the leaves once a week. It changes the ph on the surface of the leaf making it difficult for the fungus to grow.
Good luck and let me know how you get on.
Kathy C.
Replied: Tuesday 25th of May 2010 10:31 PM
