Perruso, J.C., & Cassino, P.C.R. 1997 Presence-absence sampling plan for Selenaspidus articulatus (Morg.) (Homoptera: Diaspididae) on citrus.. Anais da Sociedade Entomologica do Brasil 26: 321-326.

Notes: The efficiency of a binomial sampling (presence-absence) technique for Selenaspidus articulatus (Morg.) in citrus orchards was evaluated. The spatial distribution of scales was aggregated, according to Taylor's law power coefficients (b = 1,636; a = 5,772). Regression analysis between the estimated proportion of infected leaves, resulted in a high determination coefficient, explaining 85,4% of the model. The number of sample unities (leaves) required to estimate infestation density was low, allowing practical application of this metodology to monitor S. articulatus populations.