Witch’s Broom on Raspberry

Any ideas for what is causing the Witch’s Brooming on this Raspbery cane. Only a small number of plants affected. The brooming is very uniform along the cane suggesting to me a systemic type of infection.

One comment

  1. Mike:

    What sort of raspberry is this (red or black)?

    Based on brooming and the scattered nature of the affected plants, this looks like a phytoplasma disease. There is such a disease called Rubus stunt that occurs on raspberries. I am finding conflicting reports (based on a VERY cursory lit. search) about whether this disease has been reported in the US. You may want to submit a sample for confirmation.

    Brian (:))

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