What is this - the Black Death?

grinder12000(4 now 5 I guess)May 28, 2012

Everything is going well as it has in the past 5 years but all of a sudden on the East and West sides of the house I get what looks to be the same problem. south side - not a speck of black. Just on selected plants.

Any ideas what this is? Columbus WI

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Tiffany, purpleinopp GardenWeb, Z8b Opp, AL(8B AL)

Do you have a dog?

    Bookmark   May 28, 2012 at 12:19PM
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grinder12000(4 now 5 I guess)

LOL - yea but the 15 year old deaf Corgi prefers to go on our carpeting. Plus . . ."it" could not go that high.

There were brownish mushrooms around. No real rain for over a week but plenty the last few days. I drove past McKay Nursery and it looked like some trees had it (but at 65 mph I was not sure).

    Bookmark   May 28, 2012 at 3:04PM
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ken_adrian Adrian MI cold Z5

frost damage a week or so ago.. complicated by drought and severe heat ...

is it right next to the pavement.. with sun reflecting off of it???

or spray drift ...

ken

    Bookmark   May 28, 2012 at 5:55PM
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grinder12000(4 now 5 I guess)

They are on top of rock walls next to the house. Looks like frost damage but I'm not sure when the last frost was.

Shade for the most part. The full sunny areas show no problem. hmmmm

    Bookmark   May 28, 2012 at 10:43PM
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Kimmsr(4a/5b-MI)

There were frost warnings out last week for areas north of generally Milwaukee to Muskegon and temperatures here dipped down below 32 although I see no eveidence, here, of frost damage. It is possible that is what you have, frost damage.

    Bookmark   May 29, 2012 at 7:36AM
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Tiffany, purpleinopp GardenWeb, Z8b Opp, AL(8B AL)

Awww sounds like your sweet old pup is not guilty! We have a great dane & he can really ruin some leaves!

    Bookmark   May 29, 2012 at 9:30AM
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grinder12000(4 now 5 I guess)

OK - let's say it's NOT frost damage (it could be but . . . ) is this something that could look like a fungus or anything??

    Bookmark   May 29, 2012 at 12:01PM
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ken_adrian Adrian MI cold Z5

so you want us to rule out a logical answer.. and speculate ad naseum??

ok.. martians ...

ken ... lol

    Bookmark   May 29, 2012 at 4:43PM
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grinder12000(4 now 5 I guess)

Well, the last time we got to 34 degrees was May 24th. Would it take that long for frost damage to show up? Everything was vibrant green up to 9 days ago.

Just sayin.

the only time I have seen this "look" was with frost damage on annuals but I've only been an active gardener for 5 years so . . . .

    Bookmark   May 29, 2012 at 11:47PM
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ken_adrian Adrian MI cold Z5

frost and freeze.. causes individual cell walls to fail..

and if it is rather minor .. rather than total collapse.. the plant can just sit there for quite a few days ... especially.. if the ambient temps are rather cool ...

then one day.. the temps spike.. and all of a sudden .. the leaves desiccate [lose water] .. and brown in a matter of one day.. and the mystery starts ...

and in my case.. its been so long since the cold snap.. i am left scratching my head as to when the damage actually happened ...

just understand.. that it need not have happened.. the night before ...the fact that it was cold on the 24th.. and you posted on the 28th.. confirms the diagnosis.. IMHO.. it does NOT.. as you seem to think.. rule it out because it was so far back in time ...

maybe you old pooch has discovered hovering ...

ken

    Bookmark   May 30, 2012 at 8:10AM
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