Serum-diagnostic discrimination in the Pseudococcidae (Homoptera: Coccoidea). II. Planococcus citri (Ris.) and Planococcus ficus (Sign.).
Differentiation or comparison between species of Pseudococcidae that are morphologically similar by means of serum-diagnostic techniques [see RAE/A 64, 6445] was continued with Planococcus citri (Risso) and P. ficus (Sign.). The data obtained by immunodiffusion and immunoelectophoretic methods that are described indicated that the 2 species were closely related immunologically, differing only in a few protein components. The existence of a genetic discontinuity, resulting from behavioural and olfactory isolation, [see 64, 6484], was also confirmed by the results of the investigation.