chart comparison

Organic Disease Comparison Charts

A comparison chart of organic fungicides and disease controls and the plant diseases each product is labeled to help manage.
By Hensley’s Seed Co.
Late blight-infected tomato plant: leaves, stem, and fruit all affected

Organic Disease Control Comparison Chart

Pictured: late blight on a field tomato. Photo © Edward Sikora, Auburn University, Bugwood.org

Always read and follow the product label for use directions and rates.

Organic fungicides and disease controls
key Legend ★= a frequently favored choice for that disease. Where a disease shows more than one ★, rotate among those products to slow the buildup of tolerance.
Problem Actinovate® MilStop® SP Liquid Copper Fungicide OxiDate® RootShield® Plus SaniDate®
Algae ✔
Early blight(Alternaria) ★ ✔ ★
Anthracnose ★ ✔ ★
Black rot ✔ ✔
Black spot ✔ ✔ ✔
Botrytis (gray mold) ★ ★ ✔ ★
Downy mildew ★ ✔ ✔ ✔
Fusarium ✔ ✔ ✔ ✔
Late blight ✔ ✔ ★
Leaf spots ✔ ✔ ✔ ✔
Phytophthora ✔ ✔ ✔ ✔ ✔
Powdery mildew ✔ ✔ ✔ ✔
Pythium ✔ ✔ ✔
Rhizoctonia ✔ ✔ ✔ ✔
Rusts ✔ ✔ ✔ ✔
Sclerotinia (white mold) ✔ ✔ ✔
Salmonella (surface sanitizing) ✔
Scab ✔
Staphylococcus (surface sanitizing) ✔


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Migrated library resource. Original named people, organizations, research, and factual provenance are retained.