Salisbury, A., & Malumphy, C.P. 2017 Changes in Status and Distribution of Hydrangea Scale, Pulvinaria hydrangeae (Hemiptera: Coccomorpha: Coccidae) in Britain. British Journal of Entomology and Natural History 30:145-153
Notes: Hydrangea scale Pulvinaria hydrangeae Steinweden, became established in Britain in the late 1980's and has since become widespread in England and has scattered distribution in Scotland and Wales. The distribution, identification, life cycle, host range and plant damage this insect causes in Britain are discussed.