"Natural" pesticides (25b exempt) aren't required to prove efficacy. Some work (citrus oil for weeds), but many are untested. EPA doesn't regulate efficacy for non-health claims. Consumer caution advised.
citrus oil has worked well for me, to kill small weeds
Simple Homemade Pesticide for Herb Gardens: Hot Sauce and Vinegar Spray
Natural Landscaping: Beauty That Belongs
Essential Gardening Products: From Basic Tools to Seasonal Specialties
Safe, Natural Alternatives for a Healthier Home and Yard
Homemade Organic Pesticides: Recipes, Risks, and Best Practices
Vegetable Garden Weed Control: Why "Weed and Feed" Doesn't Exist for Edibles
Tomato Aphid Control: From Hand-Picking to Chemicals
Moss on Tree Stumps and Branches: Dry It Out
Pesticide Effects on Plants: Science Fair Guide
Accidental Roundup on Dormant Bermudagrass: Recovery Expectations
Organic Pest Management for a First-Time Vegetable Garden
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