Blight question

tgplp · March 3, 2011

Hi! Do frosts kill late blight spores and help prevent blight next year? (there's gotta be something frost is good for!)

Thanks!
Taryn

RayR · March 4, 2011

For Late Blight, in the north the long cold winters kill off the spores, but not if the spores are underground overwintering on infected Potato tubers.

**carolyn137** · March 5, 2011

Quote:

Originally Posted by RayR

For Late Blight, in the north the long cold winters kill off the spores, but not if the spores are underground overwintering on infected Potato tubers.

The problem is that Taryn is in Washington State where the two mating types of Late Blight are present so they can form sexual spores that can over winter. The two mating types, A and B are present in several areas of the PNW and I think some places in the mid-west but I'd have to confirm that by Googling and I just don't have the time right now.

Here in the East we have only the type A so yes, the spores of those are killed as you descibed.

tgplp · March 5, 2011

Carolyn- oh, darn.

I hope I don't get late blight again this year! And I have a tiny garden so it's hard to do crop rotation! I have an 8 by 8 foot hoophouse, and a 9 by 9 foot raised bed. Is there any possible way to not get blight without using chemicals?

Thank you!
Taryn

amideutch · March 6, 2011

Taryn, use a mixture of Biota Max and Actinovate as a dip when planting out your seedlings and use Actinovate and EXEL LG as a foliar during the course of the season. Exel LG is a Bio-Friendly product. If you have a problem with Exel LG use Actinovate alone. Ami

tgplp · March 6, 2011

Ami,
Thanks! I will try to do that this year.

Taryn

March 3, 2011	#1
tgplp Tomatovillian™ Join Date: Jan 2011 Location: Pacific North West, zone 8a Posts: 510	Blight question Hi! Do frosts kill late blight spores and help prevent blight next year? (there's gotta be something frost is good for!) Thanks! Taryn

March 6, 2011	#5
amideutch Tomatovillian™ Join Date: Feb 2006 Location: Germany 49°26"N 07°36"E Posts: 5,041	Taryn, use a mixture of Biota Max and Actinovate as a dip when planting out your seedlings and use Actinovate and EXEL LG as a foliar during the course of the season. Exel LG is a Bio-Friendly product. If you have a problem with Exel LG use Actinovate alone. Ami __________________ Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways, totally worn out, shouting ‘...Holy Crap .....What a ride!'

March 4, 2011	#2
RayR Tomatovillian™ Join Date: Jun 2010 Location: Cheektowaga, NY Posts: 2,466	For Late Blight, in the north the long cold winters kill off the spores, but not if the spores are underground overwintering on infected Potato tubers.

March 5, 2011	#4
tgplp Tomatovillian™ Join Date: Jan 2011 Location: Pacific North West, zone 8a Posts: 510	Carolyn- oh, darn. I hope I don't get late blight again this year! And I have a tiny garden so it's hard to do crop rotation! I have an 8 by 8 foot hoophouse, and a 9 by 9 foot raised bed. Is there any possible way to not get blight without using chemicals? Thank you! Taryn