CULT: Best Spray for Late Fungal Spot

Greetings.
 
Are there any chemical sprays labeled for Iris which appear to be  
effective against fungal leaf spot after it has manifested and had some  weeks to 
develop? Obviuosly the spots are not going to go away, but is there  anything 
which appears to arrest them and retard new outbreaks?
 
Is all chemical treatment of fungal leaf spot preventive in nature?
 
Is there any soil treatment which will help beat back spot other than  
solarizing?
 
What do you personally do if you get a bad spot outbreak? Bloom is  past, 
the leaves look grody to the max, and there must be spores aplenty. Do you  
spray? Do you cut everything back to the ground? Prevention is better than 
cure,  sure. but you did not prevent well enough, so, what now? 
 
Thank you.
 
Cordially,
 
Anner Whitehead
Richmond VA USA  
 
 
 
   
 


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