Disease Control

Leaf Spots and Blights (Alternaria, Cercospora, and Powdery Mildew)

Select resistant cultivars when available. Use cultural practices that minimize periods of leaf wetness such as increased plant spacing, planting in the direction of prevailing winds, and avoiding overhead irrigation. Promptly incorporate plant debris after harvest to speed decomposition.

FRAC Group 3:

• propiconazole (Tilt): 3 to 4 fl oz/A; PHI 21d beets, 14d chard; REI 24h. For Cercospora on beets and Swiss chard and powdery mildew on beets only. 

FRAC Group 7: 

• fluopyram (Velum Prime): 3 to 6.84 fl oz/acre; PHI 0d, REI 12h. For powdery mildew on Swiss chard only.
• fluxapyroxad + pyraclostrobin (Merivon Xemium): 4 to 5.5 fl oz/A beets, 4 to 11 fl oz/A chard; PHI 7d beets, 1d chard; REI 12h. Groups 7 & 11. 
• fluopyram + trifloxystrobin (Luna Sensation): 5 to 5.8 fl oz/A beets, 7.6 fl oz/A chard; PHI 7d beets, 0d chard, REI 12h, Groups 7 and 11.
• pydiflumetofen + fludioxonil (Miravis Prime): 6.8 fl oz/A beets, 9.2 to 13.4 fl oz/A chard; PHI 7d beets, 0d chard; REI 12h, Groups 7 & 12. Not for Cercospora on Swiss chard.

FRAC Group 9:

• cyprodinil + fludioxonil (Switch 62.5WG): 11 to 14 fl oz/A, PHI 7d beets, 0d chard; REI 12h, Groups 9 & 12. Not for Cercospora.

FRAC Group 11:

• azoxystrobin (Quadris F): 6 to 15.5 fl oz/A; PHI 0d, REI 4h. Applications of Quadris to leafy vegetables may cause phytotoxicity; proceed with caution with regards to tank mixes and adjuvants. Rates vary depending on crop and disease. Do not alternate with other Group 11 fungicides.
• fluxapyroxad + pyraclostrobin (Merivon Xemium): 4 to 5.5 fl oz/A beets, 4 to 11 fl oz/A chard; PHI 7d beets, 1d chard, REI 12h. Groups 7 & 11. 
• fluopyram + trifloxystrobin (Luna Sensation): 5 to 5.8 fl oz/A beets, 7.6 fl oz/A chard; PHI 7d beets, 0d chard, REI 12h, Groups 7 and 11.
• pyraclostrobin (Cabrio EG): 8.0 to 12.0 oz/A beets, 12.0 to 16.0 oz/A chard; PHI 0d, REI 12h. Do not alternate with other Group 11 fungicides.
• trifloxystrobin (Flint): 2 to 3 oz/A; PHI 7d, REI 12h. Do not alternate with other Group 11 fungicides.

FRAC Group 12:

• cyprodinil + fludioxonil (Switch 62.5WG): 11 to 14 fl oz/A, PHI 7d beets, 0d chard, REI 12h, Groups 9 & 12. Not for Cercospora.
• pydiflumetofen + fludioxonil (Miravis Prime): 6.8 fl oz/A beets, 9.2 to 13.4 fl oz/A chard; PHI 7d beets, 0d chard; REI 12h, Groups 7 & 12. Not for Cercospora on Swiss chard.

FRAC Group BM01:

• Swinglea glutinosa extract (EcoSwing ^OG): 1.5 to 2 pts/A; PHI 0d, REI 4h. Beets only. Labeled for Alternaria leaf spot and powdery mildew.
• thyme oil (Guarda): 1 gal/29–159 gal water (0.625%–3.3% v/v); PHI 0d, REI 0h.

FRAC Group BM02:

• Bacillus amyloliquefaciens strain D747 (Convergence ^OG): 0.5 to 1 pt/A; PHI 0d, REI 4h. Beet only. 

FRAC Group M01:

• copper hydroxide (Kocide 3000): 0.75 to 2 lb/A. PHI 0d, REI 24h. Beet only. Do not apply in a spray solution having a pH less than 6.5 or tank mix with Aliette. An OMRI-listed formulation is available (Kocide 3000-O^OG).

FRAC Group P04:

• laminarin (Vacciplant): 14.0 to 22 fl oz/A; PHI 0d, REI 4h. 

FRAC Group P05:

• Reynoutria sachalinensis extract (Regalia^OG): 0.5 to 4 qt/A for beet, 1 to 4 qt/A for chard; PHI 0d, REI 4h. Apply to ensure thorough coverage. 

Downy Mildew (Peronospora farinosa f. sp. betae)

More commonly affects spinach but may also infect beets and Swiss chard. Appears as chlorotic patches on the upper surfaces of leaves and fuzzy grayish sporulation on the undersides. Use cultural practices that minimize periods of leaf wetness such as increasing plant spacing, planting in the direction of prevailing winds, and avoiding overhead irrigation. Promptly incorporate plant debris after harvest to speed decomposition. 

FRAC Group 7:

• fluxapyroxad + pyraclostrobin (Merivon Xemium): 6 to 11 fl oz/A; PHI 1d, REI 12h. Groups 7 & 11. Disease suppression on Swiss chard only.
• fluopyram + trifloxystrobin (Luna Sensation): 7.6 fl oz/A; PHI 0d, REI 12h, Groups 7 & 11. Disease suppression on Swiss chard only.

FRAC Group 11:

• azoxystrobin (Quadris F): 12 to 15.5 fl oz/A; PHI 0d, REI 4h. Do not alternate with other Group 11 fungicides. Swiss chard only.
• fluxapyroxad + pyraclostrobin (Merivon Xemium): 6 to 11 fl oz/A; PHI 1d, REI 12h. Groups 7 & 11. Disease suppression on Swiss chard only.
• fluopyram + trifloxystrobin (Luna Sensation): 5 to 7.6 fl oz/A; 0d (chard), REI 12h, Groups 7 & 11. Disease suppression on Swiss chard only.
• pyraclostrobin (Cabrio EG): 12 to 16 oz/A; PHI 0d, REI 12h. Do not alternate with Quadris or Flint. Swiss chard only.

FRAC Group 40:

• ametoctradin + dimethomorph (Zampro): 14 fl oz/A; PHI 0d, REI 12 h, Groups 45 & 40. Swiss chard only.

FRAC Group 43:

• fluopicolide (Presidio): 3 to 4 fl oz/A; PHI 7d for beets, 2d for chard, REI 12h. Must be tank-mixed with a fungicide with a different mode of action. Swiss chard only.

FRAC Group 45:

• ametoctradin + dimethomorph (Zampro): 14 fl oz/A; PHI 0d, REI 12h, Groups 45 & 40. Swiss chard only.

FRAC Group 49:

• oxathiapiprolin (Orondis Gold 200): 1.2 to 2.4 fl oz/A; PHI 0d, REI 4h. Begin foliar application prior to disease development. Swiss chard only. 

FRAC Group BM01:

• thyme oil (Guarda): 1 gal/29–159 gal water (0.625%–3.3% v/v); PHI 0d, REI 0h. 

FRAC Group BM02:

• Bacillus amyloliquefaciens Strain F727 (Stargus^OG): 0.5 to 4 qt/A; PHI 0d, REI 4h. Apply preventatively.

FRAC Group P05:

• Reynoutria sachalinensis extract (Regalia^OG): 0.5 to 4 qt/A; PHI 0d, REI 4h. Swiss chard only.

FRAC Group P07:

• potassium salts of phosphorous acid (Fosphite): 1 to 3 qt/A; PHI 0d, REI 4h. Do not apply to plants that are heat- or moisture-stressed. Do not apply directly to plants treated with copper within a 20-day interval to avoid plant injury.

Seed Decay

Plant on well-drained soil. Buy treated seeds. Do not use treated seed for food, feed or oil purposes.

FRAC Group 4:

• mefenoxam (Apron XL): 0.085 to 0.64 fl oz/100 lb seed; REI 48h. For Pythium damping-off protection. 

FRAC Group 12:

• fludioxonil (Maxim 4FS): 0.08 to 0.16 oz/100 lb seed; REI 12h. For protection against seed-borne and soil-borne true fungi. Does not control Pythium and Phytophthora.

FRAC Group M03:

• thiram (Thiram 42 S): 8 fl oz/100 lb seed; REI 24h. For use by professional applicators only.