The biology and management of bark beetles in old growth pine forests of Itasca State Park
| Executive summary part II: Nutritional suitability of pine trees for bark beetles |
| Downed trees of red pine, white pine, and jack pine can all provide excellent habitat for bark beetles. Increases in population size of up to 10-fold per generation are possible (Fig. 1.2). Thus, a local population of 1000 I. pini could increase to 1,000,000 I. pini over three generations from May to October. A single downed tree could produce as many as 80,000 bark beetles. These data substantiate the concern that blowdowns can lead to rapid dramatic increases in the abundance of bark beetles. |
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