Thank you for writing. It is upsetting to have such beautiful shrubs destroyed. 

First, if you haven’t already done so, please contact the Great Lakes Early Detection Network to help monitor the spread of viburnum leaf beetle and other invasive species. You can download the app at https://apps.bugwood.org/apps/gledn/ .

According to Cornell University you can compost the affected branches, although burning them is preferred. Other universities suggested burning or burying.

Systemic pesticides can be applied to kill VLB. Wait until after the shrub has flowered before applying to protect the pollinators. Once applied, it will take time for the chemicals to be absorbed depending upon the amount of water available to the shrubs. Depending upon the chemical you use, it may remain in the shrub for as long as a year. Read the label on the product you select to get more information.

There is one more possibility in addition to using sprays or systemic pesticides. Researchers have found that VLB larvae crawl down the shrub to enter the ground to pupate. While it hasn’t been proven, it’s a very good possibility that if you use a sticky substance such as Tanglefoot tree pest barrier around the base of the shrub you might be able to keep the larvae from reaching the soil to pupate.

For more information you might find the following websites useful: https://ohioline.osu.edu/factsheet/anr-39 and http://www.hort.cornell.edu/vlb/manfaq.html