Great! I think I have my first fungus

patmac

I noticed it today on one of my Elms and I believe it is Black spot.
After a quick search here on Bonsaitalk I rushed out to the store to pickup some Daconil.
I was told it has been pulled off the market.
They did have a product by Bonide called Fung-onil. It contains
Chlorothalonil ………………… 00.087%
Other ingredients ……………… 99.913%
Whatever that means!

Has anyone used this Fungicide?

Patrick

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Bruce Winter

Ortho Garden Disease Control is the former Daconil

TreeBay

You know, this time of year with Chinese elms, sometimes the leaves just don't know when to die. (That sounds awful somehow) They wind up looking cruddy and getting pushed off by new buds Looks like it's an old leaf there. Are any of the new leaves affected?

Regards,

Matt

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patmac

There isn't much for new growth and the black spots seem to be fairly widespread. But it does seem to be on the old leaves so that could be it.

Patrick

Joanie

Do Chinese Elms take systemics okay?

Joanie

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sauce

Google "black spot and elm" you will find a lot of info. One other thing I would consider is watering. It's not staying too wet is it?

JohnQuinn

In my experience, Chinese Elms are apt to drop their leaves when assaulted with systemics...they bounce back readily, but it can be alarming the first time it happens!
"You know, this time of year with Chinese elms, sometimes the leaves just don't know when to die..." Well, probably not if it was outdoors in Vermont!
Here in SC that's definitely true though. I assume you must be keeping it indoors. Mine have been much healthier each year since I started keeping them all outside and allowing a 'winter' dormancy. Of course my 'winter' is pretty tame so check with locals for winter protection strategy in your area.

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Interplast

Sivananda Center

007

That to me does not look like black spot . . . i think its just an old leaf.

Here's an article at dallas bonsai

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patmac

Sauce,
The soil and roots are fine. I have a humidifier in the, according to my 3 year old "Bonsai room". I noticed fungus on the windowsills and black spots on the leaves of my elm and a couple of houseplants. I have since been using a fan to increase air circulation. I thought that might be the cause but I'm not sure.


Patrick