The directions on the bottle will tell you. That being said, I just looked at the directions again last night and its zero days to harvest for tomatoes.

Daconil is very low-toxicity, and isn't absorbed into the plant at all. It plasters itself to the skin of the plant as a physical barrier, preventing spores from getting a foothold, as it were.

Since it isn't absorbed, washing the fruit gets rid of it pretty much totally. Even if you don't wash, though, it takes a heck of a lot of chlorothalonil to affect a mammal in any way (and by a heck of a lot, I mean guzzling the sprayer bottle). So wash, eat, and be merry. :)

--Alison