Aaghhh!! Late blight.

[beeman]

What a bummer of a season for tomatoes in my area!!
First I had Fusarium, which effectively downed all my production crop. Had to buy Toms for processing!!
Now I find Late Blight on some heirlooms I have been testing to see if we like them. I did check with Cornell and it's definite, pulled them all, about to spray everything with brewed Biotamax, in the hope I can quash any future problems.
This raises a question. Is late blight transmitted by the seed, or is it strictly air bourne?

[RayR]

The spores are wind-dispersed, the pathogen can only survive on living host plant tissue, not seeds. The pathogen cannot survive cold northern winters unless there are infected potato tubers that are left underground over winter.

Late Blight: A Serious Disease of Potatoes and Tomatoes

[novel grower]

Originally Posted by RayR

The spores are wind-dispersed, the pathogen can only survive on living host plant tissue, not seeds. The pathogen cannot survive cold northern winters unless there are infected potato tubers that are left underground over winter.

Late Blight: A Serious Disease of Potatoes and Tomatoes

Well thanks for posting that informative article! Wish I had read about it earlier I had a complete loss of all my tomatoes this year. Really hope too do better in the future!!

[KarenO]

Where are you in Canada Beeman? It's a big place.
KarenO

[beeman]

Originally Posted by KarenO

Where are you in Canada Beeman? It's a big place.
KarenO

Just above Lake Simcoe, Southern Ontario.