that has maneb, mancozeb, chlorothalonil, or fixed copper as an active ingredient AND has tomato and potato late blight on the label. Of these fungicides, only some of the fixed copper products are approved for organic production. Contact your Cornell...
or were forced to emigrate. Entire potato crops rotted in the field or in storage because of late blight infection. Late blight is caused by an oomycete pathogen that survives from one season to the next in infected potato tubers. This organism is well...