Lecanicillium

Definition

A genus of entomopathogenic fungi in the family Cordycipitaceae (order Hypocreales), comprising approximately 21 described species that infect and kill arthropods. Formerly classified under Verticillium, species in this genus are characterized by producing conidia from verticillate or solitary phialides and are widely studied for biological control of insect pests and mites. The type species, Lecanicillium lecanii, was historically a dominant commercial biocontrol agent against aphids, whiteflies, and scale insects.

Etymology

From Greek lekane (basin, bowl) + Latin -cillium (diminutive suffix), referring to the cup-shaped or basin-like conidiogenous structures.

Example

Lecanicillium muscarium and L. longisporum are deployed as microbial insecticides in greenhouse systems to manage aphid outbreaks on cucumber and tomato crops, where the fungus invades through the cuticle and produces toxins that kill the host within 3–5 days.

Synonyms

• Verticillium lecanii (historical)

Related Terms

• entomopathogenic fungus
• Cordycipitaceae
• Biological control
• mycoinsecticide
• conidium
• phialide
• Beauveria
• Metarhizium
• aphid biocontrol

Usage Notes

The genus was segregated from Verticillium by Zare & Gams in 2001 based on molecular phylogenetics and morphological criteria; many literature references to 'Verticillium lecanii' prior to 2001 actually refer to Lecanicillium species. Some species show host specificity (e.g., L. araneicola on spiders), while others have broad arthropod ranges. Not all Cordycipitaceae are entomopathogenic—some are saprotrophs or plant endophytes—so host association should be verified per species.