Managing Fungicide

Understanding Protectant Fungicides (FRAC groups M01– M12) in 2024

Plant & Pest Advisory- May 12, 2024- Andy Wyenandt

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Protectant (contact) fungicides, such as the in organics (copper, FRAC group M01) and sulfur (FRAC code M02); the dithiocarbamates (mancozeb, M03), phthalimides (Captan, M04), and chloronitriles (chlorothalonil, M05) are fungicides which have a low chance for fungicide resistance to develop. Protectant fungicides typically offer broad spectrum control for many different pathogens.Why wouldn’t fungi develop resistance […]

Theories on Managing Fungicide Resistance Development by Tank Mixing or Rotating Fungicides

Andy Wyenandt, Rutgers Cooperative Extension

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The question of whether to tank mix high-risk (HR) fungicides with low-risk (LR) protectantfungicides or the rotation of HR fungicides with LR fungicides remains an open debate. The tankmixing or alternation of fungicides has been widely advocated as a means to delay or minimize the risks of resistance development (Genet et al., 2006; McGrath 2011; […]