Treatment For Mildew And Rust On Viburnum Davidi Leaves

Question

Please can you advise me on the attached photo of the leaves as a lot of them have been infected and the problem seems to be getting worse. I have sprayed them with Rose Clearbut is there something else that would be more affective so i dont lose the shrub. Thank you and look forward to hearig from you. Photo attacheds

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Answer 1

It looks like fungal disease so I'm surprised the Rose Clear hasn't helped. Neem oil may help. Spider mites can also cause stippling, so check for those and treat with a miticide or Neem oil.

These articles should help:

https://www.gardeningknowhow.com/ornamental/shrubs/viburnum/diseases-affecting-viburnums.htm

https://www.gardeningknowhow.com/ornamental/shrubs/viburnum/pests-affecting-viburnums.htm

https://www.gardeningknowhow.com/plant-problems/pests/insects/red-spider-mites.htm

https://www.gardeningknowhow.com/ornamental/shrubs/viburnum/brown-viburnum-leaves.htm