Abstract
AbstractHeight growth and number of side branches developing the first growth season after chemical suppression of the European pine shoot moth, Rhyacionia buoliana (Schiff.), were measured on 40 treated and nontreated plots of red pine, Pinus resinosa Ait., in Michigan. Some plots had been treated during the summer-treatment period and some during the spring-treatment period. Summer treatment increased the height growth and number of side branches over no treatment; the degree of chemical suppression was useful in estimating tree growth during the following growing season. In contrast, spring suppression had no effect on height growth and number of side branches.
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