I sprayed last night with copper spray as a preventive measure, we had fungus problems last year in our garden. I used the maximum strength which was 2 tbs per 1/2 gallon. I realize I should have went with the weakest now. Is there anything I can do at this point to save them? I used lawn chairs to cover them today, it seemed as the day went on, the sun was making them wilt more and more. Any ideas or suggestions would be appreciated.