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Toni
09:11AM, 22 Oct 2009
Answer: Hardenbergia can develop leaf spots which can b...
Category: Diseases
Expert
09:11AM, 22 Oct 2009
Tim
My Viburnum odoratissums leaves have turned yellow & there is venation of some leaves. Disease or deficiency?

It is grown in part-shade and some leaves have black spots and are dying off.

Submitted: 08:12PM, 15 Feb 2016
Answer: Hi Tim,

Thank you for contacting us regarding your Viburnum. It’s hard to determine exactly what went wrong with your plant. But in general, Yellowing leaves with venation is normally indicating iron deficiency, which may caused by high soil pH. You can supply Iron Chelate by either watering in the soil or foliage spray. With your black spots on the leaves, it could be fungal disease. You can control it by trimming and disposing infected leaves, then apply fungicide. Without knowing exactly what type of fungal disease the tree has, it is hard to specify any particular fungicide, a photo of the infected leaf would help us in the future. Hope this would help.

Category: General
Answered: 08:11AM, 16 Feb 2016

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