I’ve got two different varieties of viburnum growing in my garden. Viburnum opulus (often referred to as a Snowball viburnum) and Viburnum plicatum (sometimes called a Japanese snowball). Unfortunately, one is not the right plant for the right place.
My 2020 garden mantra is “Do No Harm”. That can mean a lot of things. To me, it means looking out for the critters that live in our garden and providing the safest environment possible. I don’t want to spray harsh chemicals that can kill beneficial insects or negatively impact the water supply. Basically, if I need to wear protective gear when I use it, it’s not the right product for our garden.
The garden presented its first challenge to upholding the “Do No Harm” mantra this spring. My Viburnum opulus has viburnum leaf beetle, Pyrrhalta viburni 1/ This pest is native to Europe. They start as larvae that grow into beetles. They are an incredibly destructive pest, and they are not easy to control using organic methods.
According to the University of Wisconsin website, the Viburnum leaf beetle came to Canada in 1947. It’s now scattered throughout the United States, including my backyard.
“When selecting viburnum plants for the landscape, DO NOT use arrowwood viburnum (Viburnum dentatum), European cranberrybush viburnum (Viburnum opulus), or American cranberry bush viburnum (Viburnum opulus var. americanum) as these types of viburnums are strongly preferred by VLB. Instead use resistant viburnums such as doublefile viburnum (Viburnum plicatum f. tomentosum), Judd viburnum (Viburnum x juddii), or Korean spice viburnum (Viburnum carlesii).”
University of Wisconsin advice to deal with Viburnum leaf beetle
My Viburnum plicatum isn’t bothered by this pest. Clearly, this is the better viburnum for my garden. It’s important to select the right plant for the right place. I shouldn’t need to spray and tend to plants non-stop in order for them to survive.
I will continue to try to control this pest organically during this growing season. If I can’t, the Viburnum opulus will be removed and replaced with something else. Perhaps another ‘Forest Pansy’ redbud tree will take its place.
I’ll be tracking my progress to save the Viburnum opulus on my Instagram stories. Wish me luck. Happy gardening!
1/ University of Wisconsin Madison horticulture department article.