Bug of the week: Pterostichus melanarius

bugaweekpterostichus.png

This common ground beetle is widely distributed. It is a voracious predator with a varied diet which includes: springtails, earthworms, aphids, slugs, and flies. This species comes in two forms: a short-winged flightless (brachypterous), and long-winged flying (macropterous). Long-winged individuals play an important role in helping this species colonise novel habitats.

During my undergraduate years, I researched the ability of P. melanarius to control  blueberry maggot infestations. Blueberry maggots develop within a single berry, leaving the berry to pupate within the soil. It is this stage when the pest is most most vulnerable to predation. In laboratory experiments, we found that addition of a single beetle was able to reduce the number of pupae between 40-80% relative to a control.

References:

Bourassa, S., Spence, J. R., Hartley, D. J., & Lee, S. I. 2011. Wing-dimorphism and population expansion of Pterostichus melanarius (Illiger, 1798) at small and large scales in central Alberta, Canada (Coleoptera, Carabidae, Pterostichini). ZooKeys 147: 545.

Renkema, J.M., Manning,  P., Cutler, G.C. 2013. Predation of lowbush blueberry insect pests by ground beetles (Coleoptera: Carabidae) in the laboratory. Journal of pest science 86: 525-532.

 

 

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s