Skorkin, L.A. 1938 [Importance of fruits as a possible means of carriage of San José scale.].. [Works of Quarantine Laboratories]. Sel'khozgiz Leningrad 272 pp.

Notes: This paper records investigations carried out on apples. Field observations showed a direct correlation between the infestation of a tree and its fruit, so that the presence or severity of an infestation could be determined by the occurrence or abundance on apples of red stains caused by feeding of the scale.