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Title: Gypsy moth egg-mass density and subsequent defoliation
Author: Campbell, Robert W.;
Source: Research Note NE-44. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 1-6
Publication Series: Research Note (RN)
Description: The relationship between insect density and subsequent defoliation is usually important among the many factors involved in deciding if, when, and where to take control action against a defoliator such as the gypsy moth. Unfortunately, the proportion of the foliage that will be removed by a defoliator in any given place and year depends not only upon the number of insects that are present, but also upon a number of other variables. Thus a particular insect density does not determine a particular defoliation level. Rather, an array of defoliation levels may result from that density; and all that one can say, unless he has quantified these other determining variables, is that each particular defoliation level within this array will have a particular probability of occurrence.
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Campbell, Robert W. 1966. Gypsy moth egg-mass density and subsequent defoliation. Research Note NE-44. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 1-6
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