What is this bug on my wisteria, please?
Bug on Wisteria
Certified GKH Gardening Expert
It appears to be one of the many types of wisteria borer. You can spray with neem oil, rosemary oil, mint oil, lavender oil, and garlic extract. Just mix a few drops of any or all of these together into warm water with a little coconut oil, and spray the plant down as often as you need.
Here is an article with more information: https://www.gardeningknowhow.com/ornamental/vines/wisteria/wisteria-borer-control.htm