Do I have to report sumac leaf spot?

No. sumac leaf spot is not a notifiable organism, so there is nothing to report to an authority. Treat it as a normal garden problem.

How is sumac leaf spot treated?

Mainly with biological and cultural measures — removing affected material, changing the conditions that favour it, and treating with agents approved in your country. The exact steps and their timing depend on the plant, the season and where you live: Dr. Phyto works them out in a free diagnosis.

Dr. Phyto

sumac leaf spot

Phyllosticta rhoina

Plants affected

Sicilian sumac

Easily confused with

sumac rust
How to tell them apart: Sumac rust (Pileolaria azerii) makes raised, powdery rusty-brown pustules on the LEAF UNDERSIDE that shed coloured spore dust when rubbed, with matching yellow flecks above. Sumac leaf spot (Phyllosticta rhoina) instead makes flat, dry, angular brown spots mainly on the UPPER surface, each ringed by a yellow halo with a greying centre and no spore powder (sometimes tiny black pycnidia dot the dead tissue). In short: erumpent powdery pustules underneath = rust; dry flat haloed spots on top = leaf spot.

Treatment

Dr. Phyto builds a dated, step-by-step treatment plan with country-approved products — start a free diagnosis to get yours.

Common questions

Do I have to report sumac leaf spot?: No. sumac leaf spot is not a notifiable organism, so there is nothing to report to an authority. Treat it as a normal garden problem.
How is sumac leaf spot treated?: Mainly with biological and cultural measures — removing affected material, changing the conditions that favour it, and treating with agents approved in your country. The exact steps and their timing depend on the plant, the season and where you live: Dr. Phyto works them out in a free diagnosis.

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