Trimble, F.M. 1925 Scale insects injurious in Pennsylvania.. Bulletin of the Pennsylvania Department of Agriculture 8: 1-21.
Notes: Notes on 24 species in 16 genera; hosts; control.
Trimble, F.M. 1925 Scale insects injurious in Pennsylvania.. Bulletin of the Pennsylvania Department of Agriculture 8: 1-21.
Notes: Notes on 24 species in 16 genera; hosts; control.