Karanja oil (from Pongamia pinnata seeds) works as a botanical pesticide. Main benefits:
• Insect growth regulation: Contains compounds (karanjin, pongamol) that disrupt molting, feeding, and reproduction of pests.
• Repellent action: Repels chewing and sucking insects like aphids, whiteflies, thrips, caterpillars.
• Fungal suppression: Shows antifungal activity against soil and foliar pathogens.
• Biodegradability: Breaks down quickly in soil and water, leaving low residue.
• Synergy with neem oil: Often used in combination with neem for stronger pest control.
• Selective safety: Generally less harmful to beneficial insects compared to synthetic pesticides.
It is not a broad-spectrum killer. Best applied as part of an Integrated Pest Management (IPM) system.