Collection: Organic Disease Control

Organic Disease Control for Garden Plants

Manage common plant diseases with fungicides, biological controls, horticultural oils, and other products suited to organic and sustainable growing programs. Product eligibility and restrictions vary, so always review the individual product label and current organic-input listing before use.

Types of Disease-Control Products

• Neem Oil-Based Products
  Neem oil products can help manage certain fungal diseases and insect pests when used according to their labels. Check the individual product for approved crops, diseases, rates, and precautions.
• Mineral-Based Fungicides
  Products containing sulfur or copper can provide control of labeled plant diseases. Follow all application limits and precautions, including restrictions intended to minimize environmental accumulation or plant injury.
• Biological Fungicides
  Biological products use microorganisms or their byproducts to help suppress labeled plant pathogens and can be incorporated into an integrated disease-management program.
• Botanical and Oil-Based Sprays
  Botanical extracts and horticultural oils offer additional options for labeled diseases and pests. Follow label directions, including timing and precautions for pollinators, beneficial insects, temperature, and sensitive plants.

Common Plant Diseases

Products in this collection may be labeled for diseases such as:

• Powdery mildew
• Leaf spots and molds
• Rust and blight
• Fire blight and peach leaf curl
• Root and soil-borne diseases

Selected products are OMRI Listed or otherwise registered for use in organic production. Eligibility, approved uses, and restrictions are product-specific; confirm the current listing and follow the product label.

Application Tips

• Identify the disease before selecting a product
• Apply preventively or at the first labeled stage
• Cover plant surfaces as directed on the label
• Reapply only at labeled intervals
• Use required personal protective equipment
• Avoid applications during prohibited weather or temperature conditions

Build an Integrated Disease-Management Program

Combine appropriate products with sanitation, resistant varieties, irrigation management, pruning, airflow, crop rotation, and regular monitoring. This reduces disease pressure and helps you select the least-disruptive effective treatment.

For products focused on soil-borne molds and diseases, visit our Mold Control Treatments Collection.