Internal and external mycoflora of the American dog tick, Dermacentor variabilis (Acari: Ixodidae), and its ecological implications.

Scopulariopsis brevicaulis, the anamorph of Microascus brevicaulis (Microascaceae, Ascomycota), has been identified in the body contents of the tick Dermacentor variabilis. After topical application of the fungal inoculum, tick mortality was marked. This is the first account describing the internal mycoflora of D.

Identification of 2,4-dichlorophenol in females of the American dog tick, Dermacentor variabilis (Acari: Ixodidae), and its possible role as a component of the attractant sex pheromone.

Presence of 2,4-dichlorophenol (2,4-DCP) in extracts of fed and nonfed adult female Dermacentor variabilis (Say) by gas chromatography and mass spectroscopy (GC/MS) is reported. 2,4-DCP was detected as part of a mixture with 2,6-dichlorophenol, which is the attractant sex pheromone in this species in a 1:9 ratio, respectively. Extracts did not contain the monochlorinated phenols, 2-chlorophenol and 4-chlorophenol.