Pale green weevil : Polydrusus impressifrons Gyllenhal (Coleoptera: Curculionidae: Entiminae)
Niedbala, John C., Jr., 1967-
Rodstrom, Robert A., 1977-
Brown, John J.
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Hybrid poplars (Populus spp.) are propagated by inserting 12–15 inch cuttings next to each water emitter in a denuded 160 or 271 acre (65 or 110 hectare) field. The number of stems/hectare depends upon the final product: 500 for sawlogs, 1,750 for pulp, and 2,750–5,500 for biomass. Adult pale green weevils are strong fliers. They immigrate into these newly planted areas from adjacent mature stands where they are not considered serious pests to mature trees. Adult pale green weevils are considered reestablishment pests, damage is more likely when propagation follows a harvest of an earlier rotation of trees. Our objectives are (1) to alert growers that the pale green weevil is a potential reestablishment problem for propagation using cuttings, and (2) to suggest how to protect these new plantings from weevil attack.