corn disease Plant disease is defined as any physiological abnormality or significant disruption in the “normal” health of a plant. Diseases generally result from the continuous irritation by a pathogenic agent or environmental factor, which leads to the development of “symptom.” Thus, disease can be caused by living (biotic) agents, including fungi, bacteria, nematode, phytoplasma, virus and viroids or by environmental (abiotic) factors such as nutrient deficiency, drought, lack of oxygen, excessive temperature, ultraviolet radiation or pollution.

Plant disease can cause significant economic losses to yield, quality and aesthetic values in a production system. For that reason, plant diseases should be diagnosed as quickly as possible in order for the grower to take corrective measures (disease management or control tactics) to minimize losses on existing plants or future planting.

Fact sheets on common plant diseases:
Additional resources:

Disease Identification Service

WVU Extension provides disease identification service. You can download the WVU Plant Diagnostic Clinic Form (PDF) to submit a disease related sample for identification.

WVU Extension Faculty Assistance

Questions regarding plant disease issues should be directed to Dr. Mahfuz Rahman at the WVU Plant Diagnostic Clinic.