|I have some rose bushes that before the rose bud fully open up, they turn black. What can I do and what is causeing this?
|Answer from NGA
July 2, 2010
|There are two possible reasons for your rose buds to turn black. One is the rose midge that causes the buds to blacken and die. the other is a fungal disease called Botrytis Blight. The disease causes flower buds to droop and remain closed. Buds turn brown and decay. Sometimes partially opened buds are attacked, and even an entire flower may be covered by gray fungus. Either problem can be controlled with a neem oil based product such as Rose Defense. Before spraying prune to remove the damaged flower buds. Then apply according to label directions. Hope this helps.
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