For soft-bodied pests like aphids, spider mites, and whiteflies, the oil smothers the insects and their eggs upon contact. The best time to spray is in the early morning or late evening, when temperatures are cooler and the sun is not at its peak.
Safe Neem Oil Use Practices and Application Tips
For severe infestations, you may need to increase the concentration slightly, but always err on the side of caution to avoid damaging sensitive plants. For personal topical applications, ensure the product is labeled for cosmetic use and is free from synthetic additives or fragrances.
When you are ready, thoroughly coat the leaves, including the undersides where pests like to reside, until the solution begins to drip. This ensures the highest concentration of active ingredients, primarily azadirachtin, which is responsible for its potent pesticidal and antifungal properties.
Safe Neem Oil Application Practices for Plants and Personal Use
Before spraying the entire plant, it is wise to test a small area first and wait 24 hours to check for any signs of phytotoxicity, such as leaf burn. A common and effective emulsifier is mild liquid soap (like Castile soap) or horticultural oil soap.
More About How to apply neem oil
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