fungal plant disease powdery mildew on peas pisum sativum. white powdery plaque and spots appear on leaves and stems.

agents agriculture appear biology botanic caused closeup control damage danger design disease diseases displays dried dries erysiphe farming filaments flower fungal fungus garden gardening green grow hyphae infected infection leaf leave leaves macro mildew nature outdoor packaging pathogen pathology pea peas pest pisi pisum plant plaque powdery problem protect protection sativum shrub sick spot spots stems summer turns white whitish wrong yellow