Table 24: Microbial Disease Control Products

The materials listed in this table are formulated from living microorganisms and/or their byproducts. The symbol OG  indicates a product is listed by the Organic Materials Review Institute (OMRI) as approved for use in organic production. 

Trade name Active ingredient Target Diseases Labeled crops Comments
Actinovate AGOG Streptomyces lydicus Downy mildew, powdery mildew, Botrytis, Sclerotinia spp., Pythium, Phytophthora, Fusarium, Rhizoctonia Greenhouse use only for vegetable crops Seed and soil treatment (drench/in-furrow), greenhouse foliar sprays
Bio-Save 10 LPOG Pseudomonas syringae Strain ESC-10 Fusarium and Helminthosporium storage rots Potato Post-harvest application

Trichoderma asperellum & Trichoderma gamsii

 Fusarium. Rhizoctonia, Pythium, Phytophthora, Sclerotinia, Sclerotium, Verticillium Corn, cole crops, fruiting vegetables, cucurbits, leafy vegetables, legumes, root, tuber, and corm vegetables, herbs, onions

Soil treatment


Companion Liquid (& WP) Biological FungicideOG

Bacillus subtilis GB03

Anthracnose, Botrytis, bacterial diseases,  Powdery mildew, Phytophthora, Pythium, Rhizoctonia, Leaf spots

All crops

Soil treatment, hydroponics, seed treatment


Bacillus subtilis QST 713 strain

Rhizoctonia, Pythium, Phytophthora, Fusarium

Most crops

Soil drench, greenhouse use


Contans WGOG Coniothyrium minitans Strain CON/M/91-08 Sclerotinia sclerotiorum
Sclerotinia minor
Most crops (Bayer formula NOT labeled for tomato) Soil treatment
DiTera DFOG Myrothecium verrucaria Strain AARC-0255 Nematodes Celery, lettuce, spinach, crucifers  
Double NickelOG Bacillus amyloliquefaciens Botrytis, Alternaria, fungal leaf spots & blights, powdery mildew, downy mildew, soilborne pathogens: Rhizoctonia, Pythium, Fusarium, Sclerotinia, (suppression only: rust, late blight, early blight),
Cucurbits, fruiting and leafy vegetables, brassicas, asparagus, bulbs, legumes/beans, sweet corn & popcorn, herbs  
MycostopOG Streptomyces griseoviridis Strain K61 Fusarium, Alternaria, Phomopsis, Botrytis, Pythium, Phytophthora, Rhizoctonia Beans, lettuce, carrots, crucifers, onions, spinach, tomato, root crops, herbs Seed or soil treatment

Trichoderma asperellum ICC 012

Trichoderma gamsii ICC 080

Fusarium, Phytophthora, Pythium, Rhizoctonia, Sclerotinia Cucurbits, leafy vegetables, fruiting vegetables, herbs  

Prestop WPOG


Gliocladium catenulatum Strain Ji1446

Pythium, Phytophthora, Rhizoctonia, Fusarium, Verticillium, Botrytis

Most crops. See label for crops registered for incorporated or drench treatment only.


RhapsodyOG Bacillus subtilis QST 713 Alternaria, bacterial blight(Xanthomonas), downy mildew, powdery mildew, Sclerotinia spp., Botrytis, rust, Pytophthora infestans Broccoli, carrot, lettuce, onion, pepper, tomato, herbs

Greenhouse Use.

RootShieldOG Trichoderma harzianum Rifai Strain KRL-AG2 Pythium, Rhizoctonia, Fusarium, Cylindrocladium, Thielaviopsis Eggplant, pepper, tomato, lettuce, crucifers, cucurbits, herbs, bulb crops

In-furrow treatment, greenhouse use

RootShield PlusOG Trichoderma harzianum Rifai Strain T-22 & T. viriens Strain G-41 Pythium, Rhizoctonia, Fusarium, Cylindrocladium, Thielaviopsis Eggplant, pepper, tomato, lettuce, crucifers, cucurbits, herbs, bulb crops soilborne diseases, greenhouse use

Serenade OptiOG, Serenade ASOOG

Bacillus subtilis QST 713 Alternaria, Anthracnose, Botrytis, downy mildew, powdery mildew, rust, Helminthosporium diseases, Didymella, Phoma, Bacterial diseases Most crops

Can also be used for postharvest disease protection

SonataOG Bacillus pumilis QST 2808 Alternaria, Downy mildew, Powdery mildew, Rust Most crops  
StargusOG Bacillus amyloliquefaciens F727 Fusarium, Phytophthora, Pythium, Rhizoctonia, Sclerotinia, downy mildew, Botrytis Most crops  
Subtilex NG Bacillus subtilis MBI 600 Rhizoctonia, Fusarium, Pythium, Powdery mildew Pepper, tomato, eggplant, cucurbits For greenhouse use only.

Taegro 2OG

Bacillus amyloliquefaciens FZB24 Rhizoctonia, Fusarium, Sclerotinia, Pythium, Phytophthora, leaf spots, Powdery mildew Fruiting vegetables, cucurbits, leafy vegetables In-furrow, transplant drench, basal spray for primarily soilborne diseases. 
Triathlon BAOG Bacillus amyloliquefaciens D747 Botrytis, Rhizoctonia, Fusarium, Sclerotinia, Pythium, Phytophthora, leaf spots, powdery mildew, downy mildew Most crops