I have been unable to apply my usual fungicide sprays for most of the past three weeks. I did get in one copper spray that got to stay on almost 24 hours before the downpours started back. I use the diluted bleach spray when frequent rains are a problem to lessen the disease problems. It can be used frequently and applied between rains even with just a few minutes to work it helps.
http://tomatoville.com/showthread.ph...t=bleach+spray
Bill