Naegele, R.P., Cousins, P., & Daane, K.M. 2020 Identification of Vitis Cultivars, Rootstocks, and Species Expressing Resistance to a Planococcus Mealybug. Insects 11, 86; doi:10.3390/insects11020086

Keywords:

  • GLRV
  • ant association
  • economic importance

    • Notes: To develop novel management tools, host resistance to Planococcus ficus, which has not previously been identified for any grape cultivars, was studied. Ten grape lines (species, cultivars, and rootstocks) were evaluated for P. ficus resistance across two separate potted plant assays. Significant differences were detected among cultivars and rootstocks in the recorded number of P. ficus juveniles, adults, and egg sacs. Cabernet Sauvignon and Chardonnay were two of the most favorable grape cultivars for mealybug population growth, whereas rootstocks IAC 572, 10-17A, and RS-3 all demonstrated some level of resistance. Southern fire ant (Solenopsis xyloni) was positively associated with mealybug populations, but did not have a negative e ect on the observed presence of other arthropod species including potential predators.