[loulac]

There are so many variables in that field of thought that no general rule can be given. Climates and people are different. Gardening can just be a pleasant pastime, when professionals must make a living and can’t afford losing their production before the first frosts.
I must say I’m surprised to notice a widespread use of Daconil. Reading the directions for use written by the different companies selling it makes me shudder ! I would never spray that stuff in my garden. Besides as I’m not a professional farmer no store would accept to sell it to me.

Copper of course is different, but when I know it will still be there in 50 years I try to use it reasonably.
Bleach has a short period of activity but doesn’t pollute the soil at all. My preferred fungicide.

Of course reading all b54red’s posts is a must. I particularly insist on the importance of post 164 on thread http://www.tomatoville.com/showthrea...090#post586090
It made me understand that hitting Late Blight is not a fight, it’s a war !