Some Principles of Fungicide Resistance (PPFS-MISC-02)
Fungicides are important tools in modern crop production. Unfortunately, one of the risks of using these products is that fungi sometimes develop resistance to them. Resistance development is a concern because the products may become less effective—or even useless—for controlling resistant pathogens and pests. This is a concern for all pesticides, including fungicides, insecticides, and herbicides. This fact sheet is intended to help pesticide applicators better understand this process. Some discussion points include: the basics of resistance development, factors that enhance the risk of resistance, adaptability of plant pathogens, and FRAC codes.
Some Principles of Fungicide Resistance (PPFS-MISC-02) is available online.
For additional publications on plant diseases and related topics, visit the UK Plant Pathology Extension Publications webpage.
By Paul Vincelli, Extension Plant Pathologist