00000nam 2200000za 4500 9.800840 CaOODSP 20250303104651 cr ||||||||||| 150521s1952 oncabo||o f000 0 eng d CaOODSP eng n-cn--- A43-867/1952E-PDF Balch, R. E. (Reginald Ernest), 1894-1994. Studies of the balsam woolly aphid Adelges Piceae (Ratz.) and its effects on balsam fir, Abies Balsamea (L.) Mill. [electronic resource] / by R.E. Balch. Studies of the balsam woolly aphid Adelges Piceae (Ratz.) (Homoptera : Phylloxeridae) and its effects on balsam fir, Abies Balsamea (L.) Mill. Ottawa : Department of Agriculture, 1952. 76 p. : ill., photographs, tables. "January, 1952". Historical publication digitized by Agriculture and Agri-Food Canada. "Science Service, Division of Forest Biology, Dominion Entomological Laboratory, Fredericton, N.B." Bliographical references: p.75-76. gccst Trees gccst Pests Canada. Department of Agriculture. PDF 8.39 MB https://publications.gc.ca/collections/collection_2015/aac-aafc/A43-867-1952-eng.pdf Publication 867