Tree Fruit Pathology Lab at Virginia Tech
Sooty Blotch and Flyspeck (SBFS) of apple are caused by a large group of fungi which grow superficially on waxy cuticle of apple fruit. Usually, flyspeck caused by Zygophiala jamaicensis shows first and then the sooty blotch appears, which is caused by a complex of …
All the major apple fungal diseases in the Shenandoah Valley are visible in 2023 growing season: apple scab (Figs 1, 2), powdery mildew (previous post from 8 May), and rust (Fig. 4). On 16 May, I found first fresh scab infections on ‘Gala’ leaves (Fig. …
1. If any young trees planted late are in bloom, or any cider cultivars are maybe in bloom in Northern VA, fire blight infection reported by NEWA EIP model on 8 May should have been controlled by streptomycin application in mix with Regulaid or Li700 …
1. On 29th April, first blossom blight symptoms were found by Bill Mackintosh (Figs 1, 2). Most likely these infections of flowers have established either on the 5th or 6th April or 16 or 17 April, with the latter being the more likely scenario as …