The root-application by pellet and hydroponic medium of azadirachtin A as a systemic plant protection product

This study investigates how azadirachtin A—a natural insect deterrent derived from neem—can be applied to plant roots, either via soil-pelleted formulations or through hydroponic systems, to act as a systemic pest control agent. The research demonstrates that the compound is taken up by bean and cabbage plants, providing protection over a period of two to three weeks: aphids (Myzus persicae and Aphis fabae) were eradicated, Pieris brassicae larvae were killed within 72 hours, and Heliothis armigera feeding was inhibited. Additionally, soil-applied pellets deterred egg-laying by Delia radicum, suggesting this method offers effective, sustained protection through systemic action.