Drake, C.J. 1935 Report of the State Entomologist.. Thirty-sixth Annual Year Book (Iowa) Part 4: 83-91.

Notes: Aspidiotus perniciosus, Chionaspis pinifoliae, Gossyparia ulmi, G. spuria, A. forbesi, A. encylus, A. juglans-regiae, A. fernaldi, Toumeyella numismaticum, A. abietus, Lepidosaphes ulmi, Aulacaspis rosae, Pulvinaria vitis, Eriosoma lanigera and Pseudococcus citri recorded in the state during the year; notes on hosts and control measures.