TThe bollworm or corn earwormThe bollworm or corn earwormde F. C. BishoppMateriasHelicoverpa armigeraControlEdiciones (1)The bollworm or corn earworm (1917)U.S. Dept. of Agriculture · inglésMás obras de F. C. BishoppFFlytraps and Their OperationFlytraps and Their OperationFFleas and their controlFleas and their controlSScrew-worms and other maggots affecting animalsScrew-worms and other maggots affecting animals
TThe fowl tick and how premises may be freed from itThe fowl tick and how premises may be freed from it