Important ornamental pests that are susceptible to this fungus include whiteflies, thrips, aphids, spider mites, and Japanese beetles. Infection usually occurs through the insect's skin. Fungal spores contact the target pest and secrete enzymes which attack and dissolve the cuticle. These spores then grow into the insect's body and use it as a nutrient source.
Mortality results from a combination of desiccation and nutrient loss.
However, because this is an insect pathogen, it will take some time to suppress the pest population. Naturalis-O, a contact mycoinsecticide from Troy Biosciences Inc., was recently registered by the EPA for use in greenhouses, outdoor ornamental plantings, and plantscapes. The product is formulated in a manner that allows the fungus to withstand ultra-violet light, temperature, and humidity extremes commonly encountered in greenhouses and field conditions. Thorough spray coverage is essential because fungal spores must contact the insect for infection to occur. Generally 3-5 applications are necessary before pests are adequately controlled.