I thought it had this on some of its leaves last year...but there seems to be much more of it this year...this has been since early spring. What is it ~ will it hurt my lilac ~ and if so what can I treat it with...please????
Many Thanks,
Chantell
Black spot? Rust? Help my Persian Lilac please...
Could it be bacterial blight? http://plantclinic.cornell.edu/FactSheets/LilacBactBlight/lilacbactblight.htm
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