The present invention provide pesticidal compositions containing a pesticidal natural oil and/or a pesticidal botanical extract and/or a pesticidal natural fungal entomopathogen, that can be used to control pests by killing the pests, preventing or reducing feeding, preventing or reducing eclosion of their eggs, or the like. These composition exhibits effective or more rapid knockdown pesticidal activity, and synergistic pesticidal activity. Some embodiments can be used to control pests including insects and/or arachnids, including arthropods such as whiteflies. The pesticidal natural oil is neem oil, the pesticidal botanical extract is refined pyrethrum extract and the pesticidal natural fungal entomopathogen is Beauveria bassiana strain GHA.
