Hosta Leaf Spots - pics - posted in wrong forum

16 years ago

Hi - Sorry for posting in the wrong forum.

Here is the link

http://forums.gardenweb.com/forums/load/hosta/hpgal0611002710826.html

Thanks,

CDO

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Comments (8)

Hosta_Haven
16 years ago
I don't know what they are but I'm also getting them on several hosta...but not nearly as many spots as you have, CDO.

I've pasted your link below...

Here is a link that might be useful: CDO's spots
0
buff24
16 years ago
Hmmm... those look like the oldest leaves on the clump, which probably emerged first this spring. Could it be latent frost damage? I've never seen spots like that before, and it seems to be just on the oldest leaves...

Buff
0
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one thing is for sure.. if you are fixated on this minor damage.. you do not have enough hosta .... you need more hosta-like diversions to keep you from fixating on these ... minor leaf damage .. from whichever reason you listed.. resulting in necrotic tissue in the little spots.. if in fact it is a rust.. its because of the dead tissue.. not the cause of the dead tissue ... i like the frost.. cell burst theory.. ken
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fist google: Gold standard.. and flip to the IMAGES side.. to understand.. what your plant is supposed to look like ... second .. this hosta goes thru transitory color changes ... and is sublime when well grown ... yours is way ahead on the color phases... and therefore.. most likely to be in too much sun.. for your zone ... and the spots.. and blotches are related to such ... also.. something tore that one leaf.. over the season ... like a weedwhip??? ... or frost as mentioned above ... as this plant can upwards of 4 foot round.. well grown ... seeing the grass in your pic [weedwhip theory] .. tells me.. its jammed into too small a space ... a pic of the whole plant might help us understand it all .. i would move it ... but will warn you.. if you do.. it might not be a prime specimen for the rest of the season ... repeatedly cutting apart a hosta... so it will stay small ... is not really a solution ... as we could probably recommend a thousand smaller hosta for a smaller space ... unless you just like the heavy labor of digging it up every few years.. to bonsai it ... ken
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early blight or septoria spot...other spots..pics.
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Comments (5)
All the inner leaves turned yellow first, ***** That's not typical of foliage infections caused by either bacteria or fungi. The spots on the leaves may have a yellow halo around them, but only initially. It sounds more like a systemic disease, but if so you should see some wilting. There are several diseases that can cause lesions on the stems, and yes, Early Blight is one of them, but there are many others. All the anti-fungals in the world aren't going to help if the infections are being caused by bacterial pathogns. If I were you I'd still go to that Problem Solver #2 in the Pest and Disease Forum and find the post that gives the TAMU link and take a look. Or could you post some pictures yourself? I in no way inteded to say that looking at pictures is useless, far from it,all I said was that often IDing diseases by pictures can be difficult. But there are many who have done so easily. Your local extension can also be a great help in helping to ID toamto diseases and I certainly would try there first before going to most nurseries. If it's Early Blight the spots on the leaves have distinctive concentric rings and the spots may be surrounded by a yellow halo. If it starts looking more bacterial after you look at some pictures then I'd get a copper containing prep and try that. If it's a systemic disease such as Fusarium that['s causing the foliage to turn yellow, then there is nothing that can help such systemic diseases. And Fusarium is found in many places in CA. but you should be seeing some wilting if it's Fusarium.\\And yes, there can be more than one infection present on a given plant at the same time. Carolyn
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Comments (27)
Ohhh. Let me try that. Well, I still couldn't do it from PB, but I was able to download it directly. But it's gihugic. I feel like an idiot with all this. Luckily my kitchen has been done for a long time, and I had already done a bathroom reveal several months ago, so I probably don't "need" to post photos. But I'd like the option. And the post was "too long", (so refused) probably because the pic was too big. I give up.
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ken_adrian Adrian MI cold Z5
16 years ago
do you get your lawn sprayed professionally ... in early spring...

or frost..

or sun when no leaves on the trees...

regardless... baby plant... leave the leaves.. they add food to the plant.. if it were a big old plant.. you could just take off the leaves that bother you...

ken
0
caliloo
16 years ago
I have a TON of plants of all varieties showing those spots this year. It has to be some bug that is in a peak cycle.

Alexa
0
houstworks
Original Author
16 years ago
There was a frost that happened right around the time this hosta's leaves were just coming up.
The other hosta near it were a little more developed so they may have been more resistant to it.

It does get more sun than some of the other hosta nearby - but not the hosta to the right of this one.

Caliloo - are you still getting more of this or is it done with it's cycle.

It hasn't gotten any worse than the photo.

Cdo
0
houstworks
Original Author
16 years ago
I'll rewrite what I wrote
mine hasn't gotten any worse since I took the photo.
0
ctopher_mi
16 years ago
It could also be damage from dissolved salts left after water evaporated from the leaves. The fortunei types are very susceptible to that - it is common after using too much water soluble fertilizers like Miracle Gro.
0
houstworks
Original Author
16 years ago
I did use a small amount of either
miracle grow or granules.

The next time I'll use more water if I use it.

This would have been in April I believe.

CDO
0

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Hosta Leaf Spots - pics - posted in wrong forum

Comments (8)

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buff24

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Hosta Leaf Spots - pics - posted in wrong forum

Comments (8)

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