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White Pine Blister Rust Attracts Rodents

When a white pine has been infected with white pine blister rust (a fungus), cankers appear on the branches and sometimes the trunk of the tree.  A large amount of sap-like ooze flows from the cankered areas, sometime drying and resembling a sugary-looking crust or film.  These areas are, in fact, high in sugar content, and rodents frequently chew them.  It’s likely that a red squirrel visited and sampled the infected white pine in the photograph, leaving a freshly-gnawed patch in the bark.

2 responses

  1. Ingemarie Richardson

    Is this white pine blister rust picked up from currents?

    February 23, 2012 at 4:52 am

    • I’m not sure what you mean by currents — can you explain?

      February 23, 2012 at 1:25 pm

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