& Integrated Pest Management
While the use of natural insecticides may present less risk than conventional formulations, there can be a downside in cost and efficacy. Many natural insecticides act only as a repellant or deterrent and their effect is slow. UV light, rain and excess moisture can rapidly degrade products, significantly reducing their residual properties. Odors from natural extract oils may be unpleasant and long lasting. In many applications, botanicals do not work as well as synthetic formulas controlling pests. Not all plant insecticides are less toxic to certain animals than synthetic insecticides. Botanical treatments are typically needed more frequently than conventional treatments resulting in a higher annual cost.
Examples of botanical extracts include peppermint, garlic, thyme, rosemary, clove, lemongrass, cinnamon as well as other organic chemicals, alcohols and oils.