Forest Landscape Effects on Dispersal of Spruce Budworm <i>Choristoneura fumiferana</i> (Clemens, 1865) (Lepidoptera, Tortricidae) and Forest Tent Caterpillar <i>Malacosoma disstria</i> Hübner, 1820 (Lepidoptera, Lasiocampidae) Female Moths in Alberta, Canada.

The correlation between E/M and forest cover in 1994 switched from weakly positive at the shortest distance class (53 m) to weakly negative at the largest distance class (1700 m), consistent with the interpretation of a weak trend toward adult females moving out of the central part of the more heavily forested part of the landscape where the outbreak was centred, and radially outward, toward the eastern and western edges where the landscape was more fragmented ( Figure 4 ).

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