Walnut husk-maggot Brooks, Fred E. (Fred Ernest), 1868-1933 creator text book Washington, D.C U.S. Dept. of Agriculture 1921 1921
print
ENG Caption title. "November 4, 1921." Diseases and pests Walnut Walnut husk maggot Bulletin of the U.S. Department of Agriculture, no. 992 https://www.biodiversitylibrary.org/bibliography/109238 16654798890420 10.5962/bhl.title.109238 RQF