Both the Vine mealybug (Planococcus ficus) and Grape mealybug (Pseudococcus maritimus) are small, cryptic insects that infest all parts of the vine and produce large amounts of honeydew (clear, sugary excretions) that damage the fruit and foliage, resulting in unmarketable grapes. The mealybugs also cause the grapevine to decline in vigour and production, as well as transmitting grapevine viruses.
Mealybugs – general information – Vitinotes
Managing Mealybugs – Vitinotes
Monitoring for Mealybugs – Vitinotes
Mealybug fact sheet – Plant Health Australia
Mealybug fact sheet, extensive
Biology and Management of Mealybugs in Vineyards (scientific paper)