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Officials Prepare for Possible Spruce Budworm Outbreak
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Targeting the spruce budworm population
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Understanding the impact of a Spruce Budworm outbreak
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(Budworms vs. the forest) Ludwig et al. (1978) proposed a model for the effects of spruce budworm on the balsam fir forest. In Section 3.7, we considered the dynamics of the budworm population; now we turn to the dynamics of the forest. The condition of the forest is assumed to be characterized by S(t), the average size of the trees, and E(t), the "energy reserve" (a generalized measure of the forest's health). In the presence of a constant budworm population B, the forest dynamics are given by
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