Abstract
Abstract Impact of the pales weevil (Hylobius pales (Herbst)) and the pitcheating weevil (Pachylobius picivorus (Germar)) was assessed during the 1979 growing season on 15 newly established loblolly pine (Pinus taeda L.) plantations in southeast Oklahoma. Early-season seedling mortality was directly related to total-season seedling mortality attributed to weevils. A linear regression model, ML = 4.04 + 1.44 M20, is used to predict cumulative late-season (late October) seedling mortality (ML) as a function of mortality accumulated by the twentieth calendar week (mid-May) (M20). This model has been used in southeast Oklahoma to establish threshold levels of weevil impact on which to base decisions regarding remedial chemical treatments.
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