Disease Control

NOTE: For the disease control products listed below, one product trade name and formulation is provided for each active ingredient (common name) as an example of rates, preharvest interval (PHI), restricted entry interval (REI), and special instructions. In many cases, there are other products available with the same active ingredient. Please see Table 25 and Fungicides and Bactericides Alphabetical Listing by Trade Name for more information on products with the same active ingredients.

The symbol OG   indicates a product is listed by the Organic Materials Review Institute (OMRI) as approved for use in organic production. See Organic Certification section for more details.

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

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

azoxystrobin (Quadris): 9.0 to 15.5 fl oz/A; PHI 0d, REI 4h, Group 11. Applications of Quadris to leafy vegetables may cause phytotoxicity; proceed with caution with regards to tank mixes and adjuvants.

copper hydroxide (Kocide 3000): 0.75 to 2.0 lb/A. Beet only; PHI 0d, REI 48h, Group M1. Do not apply in a spray solution having a pH less than 6.5 or tank mix with Aliette.

penthiopyrad (Fontelis): 14.0 to 24.0 fl oz/A; PHI 3d, REI 12h, Group 7.

propiconazole (Tilt): 4.0 fl oz/A; PHI 14d, REI 12h, Group 3.

pyraclostrobin (Cabrio): 12 to 16 oz/A; PHI 0d, REI 12h, Group 11. Do not alternate with Quadris or Flint.

Swinglea glutinosa extract (EcoSwingOG): 1.5 to 2 pts/A; PHI 0d, REI 4h. Labeled for Alternaria leaf spot and powdery mildew.

trifloxystrobin (Flint): 2 to 3 oz/A; PHI 7d, REI 12h, Group 11. Do not alternate with other Group 11 fungicides.

Downy Mildew (Peronospora farinosa f. sp. betae)

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

ametoctradin plus dimethomorph (Zampro): 14.0 fl oz/A; PHI 0d, REI 12 h, Groups 45 and 40. Not for beets.

Bacillus amyloliquefaciens F727 (StargusOG): 2 to 4 qt/A; PHI 0d, REI 4h, Group 44. Apply preventatively in a minimum of 50 gallons of water/A.

fluopicolide (Presidio): 3.0 to 4.0 fl oz/A; PHI 2d, REI 12h, Group 43. Must be tank mixed with a fungicide with a different mode of action. Not for beets.

oxathiapiprolin (Orondis Ultra A): 2.0-4.8 fl.oz/A; PHI 0d, REI 4h, Group 49. Begin foliar application prior to disease development. Not for beets.

phosphorous acid  (Fosphite): 1.0 to 3.0 qt/100 gal; PHI 0d, REI 4h, Group 33. Do not apply to plants that heat or moisture stressed. Do not apply directly to copper treated plants within 20-day interval to avoid plant injury.

pyraclostrobin (Cabrio): 12 to 16 oz/A; PHI 0d, REI 12h, Group 11. Do not alternate with Quadris or Flint. Not for beets.

Seed Decay

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

fludioxonil (Maxim 4FS): 0.08 to 0.16 oz/00 lb seed; REI 12h, Group 12. For protection against seed-borne and soil-borne fungi. Does not control Pythium and Phytophthora.

mefenoxam (Apron XL): 0.085 to 0.64 fl oz/100 lb seed; REI 48h, Group 4. For Pythium damping-off protection.

thiram (Thiram 42 S): 8.0 lb/100 lb seed; REI 12h, Group M3. Not for Swiss chard.