Triazole Fungicides

Farmers and agronomists value triazole fungicides for their broad-spectrum activity and "curative" properties. While preventative application is ideal, triazoles are unique in their ability to stop an infection that has already begun to develop within the plant tissue. This makes them a critical tool during disease outbreaks, particularly for controlling complex diseases like Septoria leaf blotch in wheat, rusts in cereals, and powdery mildew in various crops.

| Feature | Triazoles (FRAC 3) | QoIs (Strobilurins, FRAC 11) | SDHIs (FRAC 7) | |---------|--------------------|-------------------------------|----------------| | Mode | Ergosterol inhibition | Respiration (complex III) | Respiration (complex II) | | Movement | Xylem systemic | Local/systemic | Xylem systemic | | Resistance risk | High | High | Medium-High | | Growth regulation | Yes | No | Slight | | Best used | Early-mid season | Preventative | Curative/Protectant | triazole fungicides