Rate of multiplication of the Hessian fly
By: by W.R. McConnell
Series: Bulletin / United States Department of Agriculture -- no. 1008; Bulletin of the U.S. Department of Agriculture -- no. 1008.
Publisher: U.S. Dept. of Agriculture
Published: 1921
Place of publication: Washington, D.C
Language: eng
Subjects: Hessian flies; Reproduction
Notes: Caption title.

"November 15, 1921"

"Professional paper"