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  1. Management of balsam twig aphids in Christmas trees /
    By: Cowles, Richard Steven. - Connecticut Agricultural Experiment Station.
    Publication info: New Haven :Connecticut Agricultural Experiment Station,[2003]
    Contributed by: University of Connecticut Libraries (archive.org)
    Subjects: Aphids  Balsam twig aphid  Christmas tree industry  Control  Diseases and pests  Economic aspects  Fir  United States  
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