Recognizing Signs and Symptoms
Common signs- observation of the actual pathogen or part of the pathogen on or in the host plant.
* click on the links for pictures of the signs and symptoms
Common Symptoms-visual or
otherwise detectable (chemical means) reactions of a plant to infection by
a pathogen. Manifestations of the pathogen within or on a host plant.
1. Abnormal coloration: chlorosis (yellowing) / Reddening / Vascular discoloration / necrosis (brown tissue)
2. Wilting of host-leaves
5. Replacement of host tissue