Abiotic Diseases of Sunflower in Nebraska (EC3028)

The environment plays a major role in the process of infection and disease development in sunflower plants by providing the weather conditions
necessary for pathogens to cause disease. However, other environmental factors, such as wind, water, temperature, or genetic abnormalities and animal interactions, also may induce damage to plants that is distinct from the more traditional pathogenic organisms. These types of problems are often referred to as abiotic diseases or disorders, but in many situations may mimic biotic diseases. The purpose of this publication is to identify and distinguish some of the common stresses in sunflowers that may be confused with those caused by pathogenic agents. Accurate recognition of the problem is critical for making proper management decisions later.