Biopesticides are derived from natural materials such as animals, plants, bacteria, and certain minerals. Bacteria like Bacillus thuringiensis (Bt) are widely used to control insect pests. Fungi, such as Beauveria bassiana and Metarhizium anisopliae, are also effective against various insect species. Additionally, some flowering plants produce compounds that can act as natural pesticides, for example, neem and pyrethrum.