Efficacy of Biochemical Biopesticides that may be used in Organic Farming

Organic Agriculture November 15, 2013 Print Friendly and PDF

eOrganic authors:

Chunxue Cao, The Ohio State University - OARDC

Gary Vallad, University of Florida - IFAS

Meg McGrath, Cornell University

Brian McSpadden Gardener, The Ohio State University - OARDC

This article summarizes publicly available data on efficacy of commercially available, EPA-registered biochemical biopesticides for plant disease control. For a more detailed introduction see the related eOrganic article Biopesticides for Plant Disease Management in Organic Farming. At the time of writing, these products were allowed for use on organic farms. However, products and their status for use on organic farms change, so before using any of these products, be sure to (1) read the label to assure that the product is labeled for the crop you intend to apply it to and the disease you intend to control, (2) read and understand the safety precautions and application restrictions, and (3) make sure that the brand name product is listed in your Organic System Plan , approved by your certifier AND registered for legal use in your state.  For more information on how to determine whether a disease management product can be used on your farm, see the eOrganic article Can I Use this Product for Disease Management on my Organic Farm?

The efficacy ratings presented here are based on the results of one-year field studies published between 2000 and 2009 in the Plant Disease Management Reports (PDMR) (http://www.plantmanagementnetwork.org/). The ratings are based on a comparison between untreated controls and the application of each product independently. These studies were not, in general, conducted on organic farms or on organically-managed land.

Efficacy ratings are scaled as follows:

  • (+) – evidence for disease control and/or yield increase
  • (±) – evidence for disease control is mixed with some reports showing positive results and others not
  • (0) – no obvious response to treatment in one or more published reports
  • (n.d.) – no data available in the selected PDMR publications
Table 1. Biochemical biopesticide products labeled for plant disease control
Trade Name Ingredient Manufacturer Target Crop Target Disease Efficacy
Garlic Barrier® Garlic Oil Garlic Research Labs, Inc Cucurbit crops, forage crops, fruiting vegetables, herbs, kiwi, leafy vegetables, legume vegetables, nut trees, ornamentals,peanuts, pome fruit trees, root and tuber vegetables, small friuts and berries, stone fruit trees,sugarcane, sunflowers, tropical fruits, turfgrass Brown spot, insect infestation Tomato/ early blight (0)
Green Light® Neem Concentrate Neem Oil Green Light Company Vegetables, fruits, nuts and spices Powdery mildew, rust, anthracnose, leaf spot and other diseases Crapemyrtle /cercospora leaf spot (0)
dogwood/powdery mildew (+)
dogwood/spot anthracnose (0)
dogwood/cercospora leaf spot (±)
Trilogy® Neem Oil Certis USA Citrus, tree fruits, cucurbits, bulb, cole and leafy vegetables, legume and fruiting vegetables, root and tuber vegetables, small fruits and berries , herbs and spices, cereal and grains, nuts, corn , alfalfa, cotton Alternaria, anthracnose, early blight, leaf blight, botrytis, greasy spot, leaf spot, post bloom fruit drop, powdery mildew, molds, scabs, rusts, shothole Tomato/early blight (0)
bean, snap/white mold, gray mold (±)
grape/ powdery mildew (0)
pumpkin/ powdery mildew ( ±)
almond/ brown rot (+)
almond/ scab ( 0)
sweet cherry/ powdery mildew (±)
Triact® 70EC Neem Oil Certis USA Citrus, tree fruits, cucurbits, bulb, cole and leafy vegetables, legume and fruiting vegetables, root and tuber vegetables, small fruits and berries , herbs and spices, cereal and grains, nuts, corn , alfalfa, cotton Alternaria, anthracnose, early blight, leaf blight, botrytis, greasy spot, leaf spot, post bloom fruit drop, powdery mildew, molds, scabs, rusts, shothole Poinsettia/powdery mildew (+)
Actino Iron® Iron Actino Iron®  Food and fiber crops, ornamentals, landscape plants, tree seedlings for transplanting to the forest Soil borne plant root rot and damping-off disease Snapdragon/root rot (+)
ECO E-RASE® Jojoba Oil IJO Products, LLC Garden and commercial vegetables and crops Powdery Mildew and whitefly Pumpkin/ powdery mildew (±)
SeaCide®

Cottonseed oil

Omega Protein, Inc  Field crops, orchards, vineyards, and greenhouse Black spot, powdery mildew and greasy spot Tomato/late blight, bacterial spot (0)
tomato/early blight (+)
summer squash/powdery mildew (±)
Heads Up® Plant Protectant Extract of Chenopodium quinoa saponins Heads Up Plant Protectants Soybeans, potato, tomato, peas, beans, and wheat Soil borne plant root rot and damping-off disease Peas/ root rot (+)
tomato/ early blight (+)
Promax™ Thyme Oil Bio Huma Nectics, Inc Crops, ornamental plants, and turf  Fungal disease Pumpkin/
phytophthora blight (±)
squash/ phytophthora blight (±)
Proud 3™ Thyme Oil Bio Huma Netics, Inc Crops, ornamental plants, and turf Fungal disease Turnip greens/bacterial leaf spot (0)
pumpkin/phytophthora blight (±)
squash/phytophthora blight (±)
Organic JMS Stylet-Oil® Paraffinic Oil JMS Flower Farms, Inc Grape, tree fruit, grass seed, and vegetable crops Powdery mildew and botrytis bunch rot Pumpkin/powdery mildew (+)
tomato/powdery mildew septoria leaf spot ( 0)
strawberry/leaf spot (0)
phomopsis/leaf blight (0)
black burrant/white pine blister rust (+)
PureSpray™ Green Petroleum Oil Petro-Canada Apples and pears, almonds, apricots, cherries, nectarines, peaches, pistachio, plums, prunes, avocados, citrus, grapes, olives, tropical fruit, ornamental fruits, vegetable crops Powdery mildew Grape/powdery mildew (0)
Saf-T-Side® Petroleum Oil Brandt Consolidated Apples and pears, almonds, apricots, cherries, nectarines, peaches, pistachio, plums, prunes, avocados, citrus, grapes, olives, tropical fruit, ornamental fruits, vegetable crops Powdery mildew, black spot, and rust Cucumber/downy mildew (±)
apple/powdery mildew (±)
almond/brown rot (+)
almond/scab (+)

 References and Citations

This is an eOrganic article and was reviewed for compliance with National Organic Program regulations by members of the eOrganic community. Always check with your organic certification agency before adopting new practices or using new materials. For more information, refer to eOrganic's articles on organic certification.

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This work is supported by the USDA National Institute of Food and Agriculture, New Technologies for Ag Extension project.