Active botanical constituents and multi-faceted mode of action
Cold-pressed neem seed oil contains over a hundred bio-active triterpenoids that deter insect feeding through multiple biological pathways.
- Azadirachtin content: Ranges from commercial concentrations of 300 ppm, 1500 ppm, 3000 ppm, 10,000 ppm, up to 50,000 ppm (5% EC).
- Anti-feedant and repellent property: Bitter triterpenoids prevent insect pests from consuming treated plant leaves.
- Insect Growth Regulator (IGR): Disrupts ecdysone steroid hormone balance, preventing insect nymphs from molting into adult stages.
- Oviposition deterrence: Discourages female insects and adult moths from laying eggs on sprayed crop foliage.
Target pest spectrum and organic farming applications
Neem formulations are approved for certified organic farming systems and IPM programmes across India.
- Sap-sucking insects: Effectively manages whiteflies, aphids, jassids, mealybugs, and thrips.
- Foliar mites: Suppresses yellow mites and two-spotted red spider mites in chilli, tea, and vegetables.
- Lepidopteran larvae: Deters young caterpillars of diamondback moth, armyworm, and bollworms.
- Fungicidal suppression: Mildly suppresses powdery mildew and rust spore germination on foliage.
Preparation, emulsification, and foliar spray practices
When preparing pure cold-pressed neem oil, farmers must thoroughly mix it with a mild liquid soap or agricultural emulsifier before adding water, ensuring a milky, uniform emulsion without floating oil slicks. Commercial neem formulations labelled as EC already contain built-in emulsifiers and dilute directly in water. Spray during early morning or late evening hours to avoid intense UV degradation of active azadirachtin.
Official source
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National Centre of Organic and Natural Farming ↗Related on KisanPe
Common questions
What is the primary active insect-control component in agricultural neem oil?
Azadirachtin is the principal active liminoid responsible for anti-feedant, growth-regulating, and repellent effects.
How does neem oil prevent pest infestations without synthetic chemicals?
Neem oil makes foliage unpalatable to insects, disrupts nymph molting hormones, and stops adult pests from laying eggs.
Why is an emulsifier or soap needed when spraying raw neem oil?
Raw neem oil does not naturally dissolve in water; adding a mild liquid soap breaks surface tension to create a stable, sprayable emulsion.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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