Ram SampangiSouthwest Idaho R&E Center, University of Idaho, Parma 83660Email: email@example.com
Host: Sphaeralcea coccinea (Nutt.) Rydb.(Scarlet globemallow)Disease name: Powdery mildew Pathogen name: Leveillula taurica (Lév.) G. Arnaud
Leveillula taurica causing powdery mildew on Sphaeralcea coccinea.
Recently, powdery mildew was observed on globemallows (Sphaeralcea grossulariifolia, S. coccinea, and S. parvifolia). Symptoms appear as a sparse, white, powdery coating over leaves (especially on upper surfaces) that quickly develops into discrete, bright, irregular white spots, at times coalescing to cover a large area of the leaf surface. Yellowing and premature leaf fall were observed along with production of minute, reddish to black (matured) chasmothecia.
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