Hessian fly:
Gallun, R.L.
Hessian fly: how to control it - Washington, DC (USA) : U.S. Department of Agriculture, 1965 - 8 pages - Printed - Leaflet -Department of Agriculture ; No. 533 .
English
Hessian fly: how to control it - Washington, DC (USA) : U.S. Department of Agriculture, 1965 - 8 pages - Printed - Leaflet -Department of Agriculture ; No. 533 .
English