Degree of Resistance Among Pear Species to the Woolly Pear Aphid, Eriosoma pyricola1

Authors:
M. N. Westwood Oregon State University, Corvallis

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P. H. Westigard Oregon State University, Corvallis

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M. N. Westwood Oregon State University, Corvallis

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P. H. Westigard Oregon State University, Corvallis

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Contributor Notes

Received for publication September 23, 1968. Oregon Agr. Exp. Sta. Tech. Paper No. 2546.

Department of Horticulture.

Department of Entomology.

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