New plant-extracted insecticides for integrated control of whiteflies in vegetable protected crops

Abstract: Plant-extracted insecticides, often referred to as botanical insecticides, are natural
compounds derived from plants showing insecticidal properties. These substances are gaining attention as environmentally friendly alternatives to synthetic chemical pesticides, and their use is growing in greenhouse vegetable production, where IPM is crucial to maintain high yields and safeguard the quality of the produce Their use in protected horticulture is supported by ecological (e. g., fast degradation, selectivity) and technical (e. g., slower resistance, organic compatibility) benefits. Integrating them with biological and cultural controls enhances effectiveness. To prevent resistance, different botanical products must be rotated, underscoring the importance of a diverse portfolio. A joint research initiative in Belgium, Germany, Italy, and Spain evaluated several KU Leuven-developed formulations against Bemisia tabaci. Overall results from these tests show good efficacy of the new botanical insecticides on the target pest (especially against adults and nymphs), similar to biological reference treatments and, in some cases, even to synthetic insecticides, as well as their selectivity to beneficial insects.