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C. W. Minott, I. T. Guild, Some Results of the Defoliation of trees, Journal of Economic Entomology, Volume 18, Issue 2, 1 April 1925, Pages 345–348, https://doi.org/10.1093/jee/18.2.345
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Abstract
Aside from killing of trees by defoliation there is a loss in growth of those that survive. This has been measured accurately for many New England species defoliated by the gipsy moth Porthetria dispar. Observations extending over ten years arc summarized and indicate that loss in growth is roughly proportional to the degree of defoliation. In the period nearly one-half of the oaks died and the survivors lost on the average more than one-third of their foliage and growth annually.
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© 1925 Entomological Society of America
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