I suggest scouting often for the *very first* sign of the disease and
then keeping potato/tomato protected with weekly sprays. Familiarize
your workers with the disease so they can be on the lookout, too. Hot
dry weather is good for reducing disease spread; if we head into wet
cooler period then spraying preventatively even before seeing the
disease makes more sense to me.
Again here are Meg McGrath's excellent sites from Cornell Cooperative
Extension with many images of the disease:
Lat blight is nearby but has not yet been reported in VT. Please be sure
to send any suspicious sample up to Ann at the UVM Plant Diagnostic
Clinic for a positive identification. That will help us all be aware if
it arrives. http://pss.uvm.edu/pd/pdc/
Copper is the material of choice to protect healthy foliage for organic
growers. The two copper fungicides that are OMRI listed and registered
in VT are Champ WG and NuCop 50WP.
Conventional growers can use several fungicide groups, and should rotate
among them, see the NE Vegetable management guide:
Please let me know if any questions.
On 6/17/2012 11:34 AM, Radical Roots Farm wrote:
> Like many of you I am sure, we received an email saying that late blight
> has been found in 7 states (NY, PA, NJ, VA, NC, FL and CA) and that
> preventive action is now recommended. BUT this notice came from a company
> selling fungicide?!?
> Vern do you have any updates and/or recommendations?