Walnut husk-maggot
By: by Fred E. Brooks
Series: Bulletin / United States Department of Agriculture -- no. 992; Bulletin of the U.S. Department of Agriculture -- no. 992.
Publisher: U.S. Dept. of Agriculture
Published: 1921
Place of publication: Washington, D.C
Language: eng
Subjects: Walnut; Diseases and pests
Other titles: Walnut husk maggot.
Notes: Caption title.

"November 4, 1921."