Pickett, A.D., & Patterson, N.A. 1953 The influence of spray programs on the fauna of apple orchards in Nova Scotia. IV. A review.. Canadian Entomologist 85: 472-478.

Notes: Lepidosaphes ulmi is mentioned as one of the pests of major importance in the apple orchards of Nova Scotia. Chemical insecticides were reviewed in terms of the population increases or decreases which may result.