Forum home› Problem solving
This Forum will close on Wednesday 27 March, 2024. Please refer to the announcement on the Discussions page for further detail.

Mahonia winter sun problems black spot

a1154a1154 Posts: 1,108
in Problem solving

Hi my new batch of plants arrived including several mahonias. I noticed just one has quite extensive black spots on the leaves.  Is this a rust and I should remove infected leaves?  I think this would be all of them.  Should i keep it away from other plants?  As ive got several im OK with binning this one if its going to cause problems. 

Posts

  • a1154a1154 Posts: 1,108

    Hello ? Any ideas? 

  • Tropical SamTropical Sam Posts: 1,488

    Can you remove the black spots with a finger or is it in the leaf itself?

  • a1154a1154 Posts: 1,108

    Hi, doesnt rub off, no. 

  • Tropical SamTropical Sam Posts: 1,488

    It does sound like Mahonia Rust - use Rose Clear, which is a fungicide and widely available, to treat it.

  • a1154a1154 Posts: 1,108

    So it could spread to other plants including roses i take it? 

  • Tropical SamTropical Sam Posts: 1,488

    Yes it is the same fungus so could spread. It is treatable with that spray: to be safe spray all the nearby plants with the Rose Clear as well.

  • a1154a1154 Posts: 1,108

    Ok will do. Thanks. 

Sign In or Register to comment.