Keys to the parasites of the Hessian fly based on remains left in the host puparium
- Source:
- Technical bulletin (United States. Dept. of Agriculture) ; no. 715 1940
- Year:
- 1940
- Subject:
- Hessian flies and Parasitic insects
- Format:
- 24 p., 5 leaves of plates : ill. ; 23 cm.
- Publisher:
- U.S. Dept. of Agriculture
- Collection:
- Organic Roots Collection