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Many things found in nature can be used to control pests. Many pesticides that are based on natural substances are allowed for use in organic agriculture. The US Environmental Protection Agency (EPA) evaluates some of them as 'biopesticides.' There is also a small list of 'minimum risk pesticides' that are exempt from EPA review. Click around within the image above to learn more.

• No matter how natural, all pesticides should be used with care.
• Always follow the label instructions, and take steps to minimize exposure to people, animals, and the environment.
• Plant oils can be harmful to the eyes, and people may be allergic to them.
• Metallic substances like zinc and sulfur can contaminate surface water and damage your equipment if not used properly.
• Your risk depends on the toxicity of the substance, and the amount of exposure.

Additional Resources

• Minimum Risk Pesticides - US Environmental Protection Agency (EPA)
• Regulating Biopesticides - US Environmental Protection Agency (EPA)
• National Organic Program - US Department of Agriculture (USDA)
• Active Ingredients Eligible for Minimum Risk Pesticide Use - New York State Integrated Pest Management
• Directory of Least-Toxic Pest Control Products - Bio-Integral Resource Center
• Know Your Active Ingredients - Our Water, Our World
• Product Toxicity Ratings - Texas A&M AgriLife Extension
• Alternative Pesticide Options for The Home Gardener - University of Arizona Cooperative Extension (This publication is not a recommendation and provides examples only)

If you have questions about this, or any pesticide-related topic, please call NPIC at 800-858-7378 (8:00am - 12:00pm PST), or email us at npic@ace.orst.edu.