Cabaleiro, C., & Segura, A. 1997 Field transmission of grapevine leafroll associated Virus 3 (GLRa V-3) by the mealybug Planococcus citri.. Plant Disease 81: 283-287.

Notes: Analysis of spatial distributions of grapefine leafroll in nine vineyards in the Galician wine-growing regions of northwestern Spain; in five, significant aggregations of diseased plants and/or disease gradients toward one of the borders of the plots constituted indirect evidence of vector transmission by a nonflying vector; P. citri associated with the infected plants; other mealybugs mentioned as vectors are Pseudococcus longispinus, P. affinis and Planococcus ficus; Pulvinaria vitis also mentioned as possible vector.