Marionberry canes turn black and die
Hello, I have two established Marionberry canes that produced well for 6-7 years, but the last 2 years as the new canes are growing they will start to get dark spots and then will die. What's going on? Thanks!
Multnomah County Oregon
Caneberries such as Marionberries can be affected by disease and/or pest issues. Cultural problems are sometimes at fault, such as when a previously sunny spot becomes shaded by adjacent tree growth.
A new pest is the rose-stem girdler. Long-time problem is verticillium wilt. Follow your plants closely this spring-summer and send photos of damage as it happens. The Master Gardener Clinic volunteers at the county Extension office are another resource. https://extension.oregonstate.edu/news/late-winter-early-spring-care-will-help-caneberries-thrive