Spots on the leaves of growing Salvia

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pfcosta S Joao Estoril, Portugal(Zone 10b) Jan 14, 2011

Brown spots on the leaves of a young growing Salvia farinacea (cloned - cut from older plant). Plant has been growing very well. Image shows spots that developed in the past four days.
- spots are visible on either upper and lower surface
- a couple of young leaves now show necrosis at the tip
- neighbour pots with growing salvias appear to develop same symptoms, although at early stage

Fungus? Bacteria?
Thanks for help.

Pedro F Costa

Thumbnail by pfcosta
Post #8310230
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themoonhowl Prairieville, LA(Zone 9a) Jan 14, 2011

Possibly Alternaria leaf spot which seems to target blue salvias.

http://www.westernfarmservice.com/newsletters/turf/alternaria.pdf

Post #8310364
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pfcosta S Joao Estoril, Portugal(Zone 10b) Jan 14, 2011

Thanks, themoonhowl. I guess I might have a serious problem here.

Post #8310401
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themoonhowl Prairieville, LA(Zone 9a) Jan 14, 2011

You are very welcome Pedro. Here is a bit of info on treatment.

http://www.ehow.co.uk/how_7477926_treat-leaf-spot-fungus.html

Post #8310637
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