Synthetic Fungicides: Common Names and Uses

Listed alphabetically by common name (active ingredient). Trade names in parentheses. Chlorothalonil dissipates over time; others are systemic (absorbed by foliage/roots to prevent/cure infection from within). Systemic fungicides must never be used on food crops. Always read instructions, wear protective clothing, goggles, and breathing mask.

• Chlorothalonil (Daconil): Multipurpose for lawns, fruits, vegetables, ornamentals.
• Thiophanate-methyl: Systemic. Effective against powdery mildew, black spot.
• Triadimefon (Bayleton): Systemic. Prevention/eradication of powdery mildew, rust, some lawn diseases.
• Triforine (Funginex): Systemic. Prevention/eradication of powdery mildew, rust, black spot, other diseases.