Do white spores have to be visible for it to be late blight?

ObliqueAngles · July 24, 2011

Despite spraying fairly regularly, I've been seeing a lot of septoria and, to a lesser degree, gray mold this year. Septoria got a foothold early and it was rather difficult to tame this year for some reason. Usually it appears early in the planting season then seems to stop, but not this year.

On the other hand, haven't seen any early blight yet so I guess it's a trade-off.

The late blight epidemic that hit a couple of years ago always seemed to start somewhere in the middle of the leaves, not around the edges. If it was late blight it would show up on the stems within a day or so. If it hasn't spread to the stems (and fruits) and your plants don't look like the walking dead after two or three days, it's probably safe to assume it's not late blight. Late blight spreads and kills pretty quickly.

July 24, 2011	#18
ObliqueAngles Tomatovillian™ Join Date: Jun 2010 Location: New Scotland, NY Posts: 20	Despite spraying fairly regularly, I've been seeing a lot of septoria and, to a lesser degree, gray mold this year. Septoria got a foothold early and it was rather difficult to tame this year for some reason. Usually it appears early in the planting season then seems to stop, but not this year. On the other hand, haven't seen any early blight yet so I guess it's a trade-off. The late blight epidemic that hit a couple of years ago always seemed to start somewhere in the middle of the leaves, not around the edges. If it was late blight it would show up on the stems within a day or so. If it hasn't spread to the stems (and fruits) and your plants don't look like the walking dead after two or three days, it's probably safe to assume it's not late blight. Late blight spreads and kills pretty quickly.