Flaming pieris spot identification


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Leaf Spot Diseases
Leaf spot diseases caused by fungi like Alternaria and Phyllosticta are most problematic on pieris when conditions are humid or moist and plants are weak and crowded or poorly spaced. Leaf spots caused by Phyllosticta are tan or brown with dark edges. The center of the spot may dry up and drop out. Alternaria leaf spots usually begin as small, dark circles that may enlarge to have a diameter of over 1/2 inch, are gray, tan or black and may feature concentric rings.

Leaf spots are controlled or prevented by pruning out and destroying infected portions, selectively removing branches on the pieris and nearby vegetation to improve circulation, raking up fallen leaves, avoiding the use of overhead irrigation and, if necessary, applying a fungicide. Vigorous new growth produced following too-vigorous pruning or excessive nitrogen-fertilizer application is particularly susceptible to fungal infection.

@BoPeep75 I have copied and pasted the above information, and hope it answers your query.
 
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Hi! Thank you for the article. I had actually read that earlier, but then I had read somewhere else a description that made it seem like it may possibly be a pest problem. As I see very few insects out except for the past week or so, I’m going to assume it’s a final infection and treat with copper. Thank you
 
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I really wish you luck with it, although it seems quite likely you may lose these :( I zoomed in on your photos and could not see any evidence of insects at all.
Have those plants been hard pruned lately ?
 
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No, it was only put in the ground last year and there just wasn’t much to prune. It’s still pretty small. I’ve removed some of the most affected leaves but I was hoping a spray would possibly save some of the better-looking leaves. If not, it might look bald by the time I stripped it :(. It’s raining all day again today so that’s not helping, and I can’t apply anything to it until it lets up.
 
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Mmm I wonder if it had a problem when/if you bought it from a nursery?
 
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