Table 23: Biorational and Organic Disease Control Materials

 The products in this table are botanical, mineral, and synthetic biorational pesticides labeled for disease control in vegetable crops. The symbol OG indicates a product is listed by the Organic Materials Review Institute (OMRI) as approved for use in organic production. 

Active Ingredient and Trade Name Target Pests Labeled Crops Comments/material type
Acibenzolar-S-methyl (Actigard 50 WG) Downy mildews, bacterial diseases, rusts Crucifers, tomato, spinach Synthetic, Plant defense activator.
Cottonseed Oil, Corn Oil, Garlic Oil (Mildew CureOG) Powdery mildew Most crops Botanical

Copper sulfate (Basic Copper 53OG)

Many bacterial and fungal diseases

Most crops

Mineral

Copper hydroxide (Champ WGOG) Bacterial blight, black rot (Xanthomonas), downy mildew, powdery mildew, Anthracnose, Phompsis, late blight, Botrytis, leaf spots Most crops Mineral
Cuprous oxide (Nordox 75 WGOG) Bacterial blight, black rot (Xanthomonas), downy mildew, powdery mildew, Anthracnose, Phomopsis, late blight, Botrytis, leaf spots Most crops Mineral
Hydrogen dioxide  (OxiDate 2.0OG) Alternaria, Phytophthora, Pythium, Rhizoctonia, Fusarium Wilt, Sclerotinia, Anthracnose, bacterial blight, Botrytis, powdery mildew, rust Beans, cucurbits, celery, crucifers, leafy vegetables tomato, pepper, onions, potato, herbs, root crops Synthetic. Contact activity only
Kaolin (Surround WPOG) Powdery mildew, sunburn and heat stress. All crops Mineral.
Neem Oil (TrilogyOG, Triact 70OG) Anthracnose, Botrytis, downy mildew, powdery mildew, scabs, rusts, leaf spots and blights Most crops Botanical

Oils, Petroleum based (JMS Stylet-OilOG, CivitasOG,& Suffoil-XOG)

Alternaria, Gummy Stem blight, Powdery mildew, Rust

Most crops

Synthetic and natural oils

Potassium Bicarbonate (KaligreenOG, MilStopOG) Alternaria, Anthracnose, Botrytis, downy mildew, Fusarium, Leaf spots, Phytophthora, powdery mildew Beans, crucifers, cucurbits, eggplant, lettuce, peppers, potato, tomato, spinach, wheat Synthetic, Biopesticide, Armicarb 100 is not OMRI listed, but MilStop and Kaligreen are.
Potassium Phosphite (Helena ProPhyt) Downy mildews, Phytophthora species, Pythium species Cucurbits, crucifers, onion, potato, tomato, lettuce, spinach Mineral, Systemic. Drench at transplant.
Mono- and dibasic sodium, potassium, and ammonium phosphites (Phostrol) Downy mildews, Phytophthora species, Pythium species Most crops Synthetic, Use caution when using in a tank mix
Monopotassium phosphate (Nutrol) Powdery Mildew Cucurbits, peppers, and tomatoes Synthetic, Can be used in greenhouse on some crops

Potassium silicate (Sil-MATRIX)

Powdery Mildew, Leaf spots

Most crops

Mineral, Broad spectrum preventive fungicide

Reynoutria sachaliensis Extract (RegaliaOG)

Powdery Mildew, Botrytis,  Leaf spots, Bacterial spot, speck, and canker

Cucurbits, peppers, lettuce, tomato, strawberry, grapes

Botanical, Plant defense activator. Use caution in tank mix.OMRI listed.

Rosemary and Clove Oils (Phyta-Guard EC) Powdery Mildews, bacterial spot Most crops Botanical

Rosemary, Clove, and Thyme Oils (Sporan EC)

Bacterial Spot, Early Blight, Gray Mold, Late Blight, Powdery mildew, Downy mildew

Most crops

Botanical

Rosemary, Thyme, and Clove Oil (SporatecOG) Anthracnose, Botrytis, downy mildew, powdery mildew, leaf spots, rusts, bacterial spot Most crops Botanical

Streptomycin Sulfate (Agri-Mycin 17)

Bacterial diseases Celery, peppers, tomato, potato Biological anti-biotic

Sesame Oil (OrganocideOG)

Powdery Mildew, Leaf spots

Most crops

Botanical
Sulfur (Micro SulfOG, Microthiol DisperssOG, Kumulus DFOG) Powdery mildew, leaf spots Most crops Mineral