Biorational and Organic Disease Control Materials (Table 24)

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. 

Most of these materials are broadly labeled for vegetable crops, unless otherwise noted. As always, read the label before use and apply only to labeled crops.

Use on vegetable crops in greenhouses and high tunnels is allowed unless noted in Comments section.

ACTIVE INGREDIENT(S)TRADE NAME(S)TARGET PESTSMATERIAL TYPE/COMMENTS
acibenzolar-S-methylAcigard 50 WGBacterial diseases, downy mildews, rustsSynthetic. Plant defense activator. Greenhouse use in summer squash only.
basic copper sulfateBasic Copper 53OGMany bacterial and fungal diseasesMineral. Not for use in greenhouse crops. Registered for use in MA only. Other non-OMRI-listed basic copper sulfate materials are registered in other NE states.
copper hydroxideChamp WGOGAnthracnose, bacterial blight, black rot, Botrytis, downy mildew, late blight, leaf spots, Phomopsis, powdery mildewMineral
cuprous oxideNordox 75 WGOGAnthracnose, bacterial blight, black rot, Botrytis, downy mildew, late blight, leaf spots, Phomopsis, powdery mildewMineral. Greenhouse use in eggplant, pepper, and tomato only.
hydrogen dioxideOxiDate 2.0OGAlternaria, anthracnose, bacterial blight, Botrytis, Fusarium wilt, Phytophthora, powdery mildews, Pythium, Rhizoctonia, rusts, SclerotiniaSynthetic. Contact activity only.
kaolinSurround WPOGPowdery mildews, sunburn, and heat stressMineral
neem oilTrilogyOG, Triact 70OGAnthracnose, Botrytis, downy mildews, leaf spots and blights, powdery mildews, rusts, scabsBotanical
oils, petroleum basedJMS Stylet-OilOG, Suffoil-XOGAlternaria, gummy stem blight, powdery mildews, rustsSynthetic and natural oils
potassium bicarbonateKaligreenOG, MilStopOGAlternaria, anthracnose, Botrytis, downy mildews, Fusarium, leaf spots, Phytophthora, powdery mildewsSynthetic. Contact activity only.
potassium phosphiteHelena ProPhytDowny mildews, Phytophthora, PythiumMineral. Systemic. Drench at transplant.
mono- and dibasic sodium, potassium, and ammonium phosphitesPhostrolDowny mildews, Phytophthora, PythiumSynthetic. Use caution when using in a tank mix.
monopotassium phosphateNutrolPowdery mildewsSynthetic. Greenhouse use in cucurbits, tomato, and pepper only.
potassium silicateSil-MATRIXPowdery mildewsMineral
Reynoutria sachaliensis extractRegaliaOGBacterial spot, speck, and canker, Botrytis, leaf spots, powdery mildewsBotanical. Plant defense activator. Use caution in tank mix.
rosemary, clove, thyme, and peppermint oilsSporan ECBacterial spot, downy mildews, early blight, gray mold, late blight, powdery mildewsBotanical. Registered for use in CT only.
streptomycin sulfateAgri-Mycin 50Bacterial diseasesBiological antibiotic. Labeled for celery, peppers, potato, and tomato only. Greenhouse use for pepper and tomato only.
sodium carbonate peroxyhydratePerCarbOGAngular leaf spot, anthracnose, Alternaria, bacterial leaf blight, bacterial spot and speck, black rot, Botrytis, downy mildews, early blight, gummy stem blight, late blight, powdery mildews,rust, white rotSynthetic
sulfurMicrothiol DisperssOGPowdery mildews, leaf spotsMineral
tea tree oilTimorex ActOGAnthracnose, Alternaria, bacterial spot, speck, and canker, Botrytis, downy mildews, gummy stem blight, leaf mold, leaf spots and blights, powdery mildews, white rotBotanical. Greenhouse use for fruiting vegetables, leafy vegetables, and cucurbits only.
thyme oilThymox ControlOGFungal diseasesBotanical. Registered for use in MA only.
Integrated Pest Management
Diagnostics for Plant Problems
Pesticide Safety
Protecting Groundwater and Surface Waters
Pesticide Mixing & Application
Pesticide Equipment Calibration
Biorational and Organic Pesticides
Biorational and Selective Insecticides and Miticides (Table 22)
Biological Controls for Insect Pests (Table 23)
Biorational and Organic Disease Control Materials (Table 24)
Microbial Disease Control Products (Table 25)
Disease Management
Fungicides and Bactericides Alphabetically Listed by Trade Name
Information about Fungicides and Bactericides by A.I. (Table 26)
Soil Fumigation Outdoors
Insect Management
Protecting Honeybees and Native Pollinators
Insecticides Alphabetically Listed by Trade Name
Insecticides and Miticides by A.I. (Table 27)
Weed Management
Physical Weed Management
Cultural Weed Management
About Herbicides
Herbicides Alphabetically Listed by Trade Name (Table 28)
Herbicides Alphabetically Listed by A.I. (Table 29)
Crops Labeled for Each Herbicide Trade Name (Table 30)
Select Weeds Controlled by Herbicide Active Ingredients According to Labels (Table 31)
Vertebrate Pest Management

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New England Vegetable Management Guide