Healthy impatiens. Photo by Connie Oswald Stofko by Connie Oswald Stofko Here are updates on three diseases and one pest: downy mildew on impatiens, tar spot on maple leaves, late blight on tomatoes and potatoes, and the brown marmorated stink bug. Maybe you’ve been dealing with these issues for years, or you might be noticing one of these for the first time. John Farfaglia, extension educator with Cornell Cooperative Extension in Niagara County, gives us updates. Impatiens There’s good news…
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