Sasscer, E.R., & Weigel, C.A. 1923 Further data on fumigation with hydrocyanic acid gas in greenhouses on a commercial basis.. Journal of Economic Entomology 16: 84-87.

Notes: Evaluation of chemical control on Hemichionaspis aspidistrae, Saissetia hemisphaerica, Pseudaonidia duplex, Chrysomphalus aonidum, C. dictyospermi, Saissetia nigra, Pseudococcus nipae, Cerataphis lataniae and Parlatoria theae viridis.