Felt, E.P. 1929 Protection of trees from insects.. Report of the Quebec Society for the Protection of Plants 43-48.

Notes: Scale species mentioned include Aspidiotus perniciosus, Gossyparia spuria, Lepidosaphes ulmi, Asterolecanium zariolosum (variolosum?), Pulvinarisa (Pulvinaria?) vitis and Toumeyella liriodendri.