The insect-pathogenic fungus Metarhizium anisopliae attacks larvae of the black vine weevil, Otiorhywhus sulcatus, an important pest of soft fruit and ornamental plants. In trials on strawberries and potted ornamental plants growing outdoors, a strain of this fungus has given promising results for control of the pest. Further work is required to determine the most effective dose rates, methods and timing of application.