Fungicide for Gray Mold?

[b54red]

Does anyone know if a copper fungicide or any other for that matter will work as a preventative for Gray Mold? It appears to be a disease that really likes to attack black tomatoes and I have been growing more and more of them and seeing Gray Mold much more frequently. I have found out over the last two years that Daconil just doesn't cut it down here when it comes to Gray Mold. It works great for preventing most other foliage diseases but really has come up short on this one. I bought some copper fungicide the other day and was thinking about applying it as a preventative soon. Our weather is no longer cool and the humidity is off the charts so Gray Mold will start showing up soon. The only treatment I have found that is effective is a bleach solution but it is more a stop the disease once it gets going treatment and not much of a preventative so a week or two later it comes back even though I keep the plants sprayed with Daconil.

Bill