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2 Weeks Ago
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#1 |
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Learning = Growth
 
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Name That Scuz!
Here is a fun looking scuz. It is on an Acer Rubrum. it is only on three leaves. The bottom of the leaf is not punctured. It is only on top of the leaves. The full size Acer Rubrum seems to be infected with it as well.
thanks for your help -Wm
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2 Weeks Ago
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#2 |
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bonsaiTALK Master Chief
Join Date: Mar-2006
Location: West Springfield Massachusetts
Country: USA
USDA Zone: zone 5
Posts: 1,124
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Not the same color but kind of looks like rust does, just before it hatches/blooms.
Not sure if there are other fungi that do the same as rust does, but if it were mine I'd cut off those leaves, and burn em, or bag em for the trash.
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If at first you don't succeed -- skydiving is not for you. Always remember that you're unique -- just like everyone else Enjoy this day. Bill |
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2 Weeks Ago
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#3 |
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bonsaiTALK Adept
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It's definitely a fungus of some kind. I agree with McSpeed, I'd take off those leaves and get rid of them away from the tree, before the fungus matures and releases spores.
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Experience is knowledge gained immediately after it was needed. |
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2 Weeks Ago
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#4 | |
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bonsaiTALK Master
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Quote:
There is no fungal leaf spot reported on red maple that looks like those on your picture. The damage looks more like an insect called : the ocellate gall midge as you can observe in this link : http://imfc.cfl.scf.rncan.gc.ca/ins...g.asp?geID=3598 |
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2 Weeks Ago
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#5 |
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bonsaiTALK Adept
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Yep, happy to say I was wrong. Looking at that image, it's definitely a more likely explanation so it should also be easier to treat.
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Experience is knowledge gained immediately after it was needed. |
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2 Weeks Ago
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#6 |
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Learning = Growth
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Ding ding ding, we have a winner. ALDEVAUX. Thank you so much! It looked more like an animal than fungi or bacterial infection. But I thought I would leave it to the experts. Infected leaves have been removed and disposed of, but the tree that my undertory stuff resides has it too...
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Life without Bonsai would be...well, death. |
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2 Weeks Ago
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#7 | |
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bonsaiTALK Master
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Quote:
Actually, you did not have to remove the affected leaves because the maggots that causes these spots are probably gone already and the spots would just remain the same, without any more damage, throughout the season. In fact, after infection, these maggots soon mature and drop to the soil surface where they remain inside the soil for the rest of the season. However, another generation of these midges will emerge from the soil the following spring and since due to several factors like weather etc., the populations may vary from year to year and may be less noticeable next year. The damage is quite negligible,except for leaf appearance, and their management is not really necessary. |
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