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  • Pale green weevil : Polydrusus impressifrons Gyllenhal (Coleoptera: Curculionidae: Entiminae) 

    Niedbala, John C., Jr., 1967-; Rodstrom, Robert A., 1977-; Brown, John J. (Pullman, Washington : Washington State University Extension, 2017-06)
    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: ...