We hope you have enjoyed the SRGC Forum. You can make a Paypal donation to the SRGC by clicking the above button

Author Topic: iris leaf spot  (Read 1574 times)

John85

  • Hero Member
  • *****
  • Posts: 507
iris leaf spot
« on: May 16, 2019, 12:37:38 PM »
Is there an organic way to control it? Copper sulfate is"allowed" but I am reluctant to use it because it kills a lot of good bugs in the soil.
Very old cvs are less prone to the disease.Can you recommend some resistant cultivars?

Maggi Young

  • Forum Dogsbody
  • Global Moderator
  • Hero Member
  • *****
  • Posts: 44777
  • Country: scotland
  • "There's often a clue"
    • International Rock Gardener e-magazine
Re: iris leaf spot
« Reply #1 on: May 16, 2019, 12:43:40 PM »
Is  leaf-spot  mostly a  problem on bearded iris / those with  rhizomes ?    We  don't  grow  any  of those - and leaf-spot  does  not  seem to be  a problem here, thank goodness. Perhaps  our  weather  is  seldom humid  enough to  encourage its  growth ?
« Last Edit: May 16, 2019, 12:46:36 PM by Maggi Young »
Margaret Young in Aberdeen, North East Scotland Zone 7 -ish!

Editor: International Rock Gardener e-magazine

John85

  • Hero Member
  • *****
  • Posts: 507
Re: iris leaf spot
« Reply #2 on: May 18, 2019, 10:33:30 AM »
You must be jocking Maggi!Not humid enough in Scotland!Ok the East coast is much drier than the West but even so!
It is mainly a problem with iris germanica hydrids and with the new cultivars even more
Not all iris with a rhizome have that problem

 


Scottish Rock Garden Club is a Charity registered with Scottish Charity Regulator (OSCR): SC000942
SimplePortal 2.3.5 © 2008-2012, SimplePortal