Observations on the biology and control of the treehopper Heliria praealta (Fowler) in orchards of the Pacific Northwest
By: by M.A. Yothers and Paul B. Allen, Jr
Contributors: Allen, Paul B.
Series: Circular / United States Department of Agriculture -- no. 606; Circular (United States. Dept. of Agriculture) -- no. 606.
Publisher: U.S. Dept. of Agriculture
Published: 1941
Place of publication: Washington, D.C
Language: eng
Number of pages: 12
Subjects: Treehoppers
Notes: Caption title.

"Contribution from Bureau of Entomology and Plant Quarantine."

Bibliography: p. 12.