Downy mildew on jack-o-lantern pumpkin was reported for the region. Downy mildew has also been reported on summer squash in New Jersey and watermelon on Long Island, NY. These hosts are primarily affected by clade 1 isolates of cucurbit downy mildew. Before this, downy mildew has primarily been affecting cucumber and cantaloupe, which are largely affected by clade 2 isolates.
Penn State Extension
Watch out for fungal diseases on melons | PennState Extension
I’ve seen alternaria and anthracnose on melons so far this season, and have also had some calls with a concern about gummy stem blight. Here’s what to look for to tell the different diseases apart. Continue Reading
Vegetable Disease Updates from Extension at PSU
Reports of Downy Mildew are Increasing: Downy mildew was confirmed on cucumber and/or cantaloupe in northeast Ohio (Wayne Co.), Essex, ON (southeastern most tip of Ontario, Canada), southeast Michigan in Monroe Co., and southern New Jersey in Salem Co. Disease pressure is also continuing to build in North and South Carolina on cucumber and cantaloupe […]
