Type of Document Master's Thesis Author Egan, Peter Joseph John URN etd-10032008-063027 Title The effect of the white-pine weevil (Pissodes strobi Peck) on white pine (Pinus strobus L) in southwestern Virginia Degree Master of Science Department Entomology Advisory Committee
Advisor Name Title Heikkenen, Herman John. Committee Chair Grayson, James McD. Committee Co-Chair Weidhaas, John A. Jr. Committee Member Keywords
- white-pine weevil infestation
Date of Defense 1973-06-15 Availability restricted Abstract
Thirteen white pine plots, ranging from 15-26 years of age and one tenth acre in size, were sampled in six counties of southwestern Virginia. The number of trees attacked by the white-pine weevil ranged from 3.5 percent to 98.6 percent with an average of 40.0 percent. The incidence of forking was found to be 4.1 percent of the trees weevi1ed. Enough trees in the dominant and co-dominant crOvffi categories were either free of weevil attacks or only attacked once that 250 to 300 trees are available for final harvest. Most of the weevil attacks occurred between 5 to 12 years of age.
Analysis of Covariance for non-weevi1ed terminals and lateral lengths developed the following relationship for three age classes of terminals and laterals.
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