2015-08-18

Drought makes B.C. timber vulnerable to hungry bark beetles

A B.C. government entomologist in Kamloops says the current drought across most of the southern half of the province is stressing timber across the Interior.

Lorraine Maclauchlan says photosynthesis drops when water is scarce, making trees more vulnerable to damaging attacks from insects such as bark beetles.

The beetles bore through bark and munch on the nutrient-carrying layer just underneath, so Maclauchlan says trees use resin as a defence, pumping out the sticky fluid in order to flush away attacking insects.