Jones, T.J., & Nita, M. 2016 Spatio-temporal association of GLRaV-3-infected grapevines,and effect of insecticidal treatments on mealybug populations in Virginia vineyards. European Journal of Plant Pathology 145: 885–900
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Notes: A series of investigations were conducted to understand spatio-temporal patterns of GLRaV-3 and mealybugs, and to examine management strategies of mealybugs under the environmental conditions of Virginia, USA. Results from a field experiment in 2009–2011 showed the effect of a delayed dormant application of acetamiprid (Assail, 0.182 L/ha) to be not significantly differing in mealybug abundance from the unsprayed check in 2010 and 2011. Moreover, an application of the contact insecticide beta-cyfluthrin (Baythroid XL, 0.219 L/ha) resulted in significantly higher numbers of mealybugs counted in 2011. Results from another insecticide trial conducted in 2010–2011 demonstrated that both dinotefuran (Scorpion, 0.292 L/ha) and spirotetramat (Movento, 0.439 L/ha) treatments significantly reduced mealybug counts when mealybug populations were high, but only spirotetramat significantly reduced mealybug counts when mealybug populations were low.
