Coquillett, D.W. 1888 Report on various methods for destroying scale-insects.. Report of the Entomologist, Annual Report of the United States Department of Agriculture pp. 123-133.
Notes: Control of the California red scale with Hydrocyanic gas.
Coquillett, D.W. 1888 Report on various methods for destroying scale-insects.. Report of the Entomologist, Annual Report of the United States Department of Agriculture pp. 123-133.
Notes: Control of the California red scale with Hydrocyanic gas.