Fungi are the most common cause of cereal diseases. These pathogens can infect various parts of the plant, including leaves, stems, roots, and grains. MATERIALS AND INSTRUMENT IN PLAT PATHOLOGY Factors contributing to post-harvest diseases: Common Problems Addressed by Plant Protection Clinics: Biological Control: A Natural Approach to Pest Management New Microsoft Office PowerPoint Presentation.ppt MG Plant Diseases 2006 3.ppt pesticide_20100208_080741.ppt