Soria, S.J., & Braghini, L.C. 1999a [Chemical control of Eurhizococcus brasiliensis (Hempel in Wille, 1922) (Homoptera: Margarodidae) 2. Evaluation of the bioefficiency of vamidothion in vineyards.]. Entomología y Vectores 6(5): 555-561.

Notes: [Original title: Controle quimico da perola-da-terra Eurhizococcus brasiliensis (Hempel in Wille, 1922) (Homoptera: Margarodidae) 2. Avaliaçao da bioeficacia de vamidotiom na cultura da videira.] A field experiment was carried out in order to assess the bioefficacy of vamidothion in the control of the Brazilian ground pearl Eurhizococcus brasiliensis (Hempel in Wille, 1922) (Homoptera: Margarodidae) in a vineyard, Rio Grande do Sul, Brazil. Significant population suppression was observed in treated plots compared with the control. No significant differences were found among treatments.