Fungal Plant Pathogen Control

Fungal plant pathogens cause billions of dollars in crop losses each year, and fungicides remain the primary tool for keeping diseases like gray mold, caused by *Botrytis cinerea*, from devastating harvests. When fungi are exposed to the same chemical classes repeatedly — strobilurins, succinate dehydrogenase inhibitors, phenylamides — they evolve resistance through targeted molecular changes, such as mutations in the mitochondrial proteins these compounds are designed to block, often within just a few growing seasons. Researchers are working to understand how these resistance mechanisms arise and spread through pathogen populations, and how rotation strategies, mixture treatments, and newer compounds can slow the process. Central open questions include how standing genetic variation in pathogen populations predicts the pace of resistance evolution, and whether ecological dynamics in agricultural landscapes can be managed to meaningfully extend the useful life of existing fungicide chemistries.

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Keywords

Fungicide ResistancePlant PathogensEvolutionManagementMolecular MechanismsPhenylamide Fungicides