Selvaraj VinodkumarDepartment of Plant Pathology, Tamil Nadu Agricultural UniversityCoimbatore, Tamil Nadu, IndiaEmail: email@example.com
Host: Symphyotrichum novi-belgii (L.) G.L. Nesom (New York aster)Disease name: Powdery mildewPathogen name: Erysiphe cichoracearum (DC)
Symptoms occur as white, powdery patches on upper surfaces of the leaves. The patches coalesce and cover the entire surface, resulting in drying of the leaf. The fungus produces characteristic chasmothecia in dried leaves. The primary source of infection is ascospores (sexual spores), and the secondary source of infection is conidia (asexual spores).
Picture your photograph as the APSnet Featured ImageClick here to find out more
License to Copy. This notice hereby grants permission to APSnet users to copy the image featured for noncommercial, personal use. All components of APSnet are copyrighted and may not be reproduced or distributed except by express permission of APS. Copyright is not claimed for material provided by United States government employees as part of their work. APSnet copyright extends to images, text, graphics, photographs, illustrations, audio, video, computer software, and all other elements of the site.Instructions to Copy. For PC, position your mouse cursor on the featured image, click the right mouse button, and choose "Save Picture As..." or "Save this Image as..." whichever is the case. For Mac, click the only mouse button and follow the same steps. Users may want to set up a specific directory and file naming scheme for storing images; otherwise, they will be saved using your system defaults. Images may be used in any software application that supports JPEG file format or viewed in an Internet browser as local files.