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The Combined Effects of Defoliation and Modified Timber Stand Improvement on Hardwoods in the Tug Hill Region of New York

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A 2×2 factorial analysis of variance was used to assess the combined effects of defoliation by forest tent caterpillar, Malacosoma disstria (Hub.), that occurred from 1991 through 1993 and concurrent modified timber stand improvement (TSI) treatments on sugar maple [Acer saccharum (Marsh.)] and black cherry [Prunus serotina (Erhr.)] in the Tug Hill region of New York state. Defoliation significantly reduced growth of both overstory sugar maple and black cherry. Defoliation significantly increased both mortality and crown dieback of overstory sugar maple. TSI treatments made during the outbreak significantly increased mortality and crown dieback of suppressed sugar maple. Defoliated stands where TSI occurred had lower mortality of overstory sugar maple, and residual overstory sugar maple recovered more rapidly from defoliation compared with untreated defoliated stands. For the first time, red maple (Acer rubrum L.) is reported as a host for forest tent caterpillar.

Keywords: Acer rubrum; Acer saccharum; Malacosoma disstria; Prunus serotina; forest defoliator-growth impact; insect defoliation-silviculture; insect-tree interactions

Document Type: Research Article

Publication date: March 1, 2007

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  • Each regional journal of applied forestry focuses on research, practice, and techniques targeted to foresters and allied professionals in specific regions of the United States and Canada. The Northern Journal of Applied Forestry covers northeastern, midwestern, and boreal forests in the United States and Canada.
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