Drake, C.J., & Guthrie, H.E. 1931 . Some important scale insects of Iowa. Iowa Dept of Agriculture 31st Yearbook of Agriculture. Iowa, U.S.A. 27 pp.
Notes: Biology; hosts; distribution; control for 16 species in 11 genera.
Drake, C.J., & Guthrie, H.E. 1931 . Some important scale insects of Iowa. Iowa Dept of Agriculture 31st Yearbook of Agriculture. Iowa, U.S.A. 27 pp.
Notes: Biology; hosts; distribution; control for 16 species in 11 genera.