Little is known about the acarofauna associated with wood-boring beetles in
Canada, including long-horned beetles (Coleoptera: Cerambycidae). Herein, we
assessed the prevalence, abundance, diversity, phenology, and attachment
location of mesostigmatic mites (Acari: Mesostigmata) associated with
Monochamus scutellatus (Say), and tested whether the
abundance and prevalence of mites differed between male and female beetles.
A total of 176 beetles were collected in two sites in eastern Ontario in
2008 and 2009 using Lindgren funnel traps baited with α-pinene and ethanol
lures, and 71% of hosts had mesostigmatic mites. A total of 2486 mites were
collected, representing eight species, four genera, and three families
(Digamasellidae, Trematuridae, and Melicharidae). Average prevalence was
variable across mite species, and the number of mites per infested beetle
also varied across species. Many of the mite species collected in this study
have been reported from other cerambycid species, as well as from other
wood-boring beetles, such as bark beetles. There was no significant sex bias
in the abundance or prevalence of mites between male and female M.
scutellatus, which suggests that there is no selective advantage
for mites to disperse on females. This study represents the first
quantitative investigation of the mites associated with M.
scutellatus in Canada.