Walnut husk-maggot [Rhagoletis suavis Loew]
By: By Fred E. Brooks.
Series: U. S.  Dept. of agriculture -- Bulletin no. 992
Publisher: [Govt. print. off.]
Published: 1921
Place of publication: Washington
Language: eng
Subjects: Walnut -- Diseases and pests.; Walnut hust-maggot. [from old catalog]