Disease Terminology

Cells under microscope

Disclaimer - It is important to recognize that the level of resistance of a variety to pests or pathogens is influenced by factors such as host age, pathogen virulence and adverse environmental conditions. New and/or atypical pest or pathogen biotypes, races, or strains may overcome resistance, sometimes completely. A susceptible variety may escape pathogen or pest attack because prevailing environmental conditions are not conducive to disease development or pest activity.

Immunity – not subject to attack or infection by a specified pest or pathogen. Seminis makes NO claims of immunity in product lines.

Resistance – the ability of a plant variety to highly restrict the growth and development of a specified pest or pathogen and/or the damage they cause when compared to susceptible plant varieties under similar environmental conditions and pest or pathogen pressure. Resistant varieties may exhibit some disease symptoms or damage under heavy pest or pathogen pressure.

Intermediate resistance – the ability of a plant variety to restrict the growth and development of the specified pest or pathogen, but may exhibit a greater range of symptoms compared to resistant varieties. Intermediate resistant plant varieties will still show less severe symptoms or damage than susceptible plant varieties when grown under similar environmental conditions and/or pest or pathogen pressure.

Susceptibility – the inability of a plant variety to restrict the growth and development of a specified pest or pathogen.

Tolerance – the ability of a plant variety to endure abiotic stress without serious consequences for growth, appearance and yield. Seminis makes NO claims of tolerance to diseases or disorders caused by pests.