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bonsaiTALK Artisan
Join Date: Oct-2006
Location: W-S, North Carolina
Country: United States
Posts: 143
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chinese elm black spot?
All of my elms were doing great - explosive growth agian this season, etc. Pruned back course growth to shape - when I started noticing the yellowing of the leaves. I was pretty sure I wasnt overwatering, (and its been pretty dry around here anyway) To me it didnt seem to just be old growth dropping either.
So I checked for any signs of pests - saw no signs and read up on black spot. Ive never had this problem before - but I read the article of blackspot fungus, and realized I had been guilty of watering thru the foilage as the new growth was coming out - a real no-no. So I thought this was the problem.
I applied two round of daconil (waiting to apply the third), all but two trees seemed to be stable (I had removed the yellow or fallen leaves when I applied the fungicide)
But those two trees (which are the the oldest with nice thick trunks unfortunately) seem to be continuing to yellow etc. Any ideas? Did I misdiagnose? I had read that after being infected they might not look so great for the rest of the season, but to me, they dont seem to be responding to the treatment. There isnt any dieback on branches (yet) but Im worried because these are my favorite elms that i have. They still have a little new growth on them but they are looking pretty bad - and they have always been very healthy.
Am i too impatient - should I be concerned? Or continue to wait it out. Im afraid Ill have dieback in the branches etc, and lose some of the shape.
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