Nematodes or Sun Damage?

16 years ago

I noticed that my Gypsy Rose is showing browning on it's leaves. I cut & soaked some leaves in water, but could not see any nems under the light with a magnifying glass. I know you don't always see them, so I'd like your opinion: Could this be nematodes, or maybe sun damage or a fungus?

It is planted in a holding bed with several other hosta I bought last year. No others are showing symptoms. It is planted under a crabapple tree that has the Apple Scab Fungus, and infected leaves are constantly dropping into my hosta bed. But I don't believe Apple Scab transfers to hostas. As far as I know it only transfers to other plants in the apple, pear & rose families.

This bed receives morning sun and evening sun, dappled the rest of the day.

This was taken 3 weeks prior to the above pictures, and showed no browning at all on 7/13/10:

Thanks,

Wendy

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Comments (8)

aahostas
16 years ago
Wendy,
Looks like good old fashioned summer melt out to me. Notice that it is mostly on the lighter part of the leaf? Nems aren't picky about what color they eat, so they would be in the green part as well. Just the time of the year for this to happen.

Denny
anitamo
16 years ago
Doesn't look like nems to me, either.
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Wendys_garden
Original Author
16 years ago
Oh good! That is a relief, thanks so much.

Wendy
countrygarden01
16 years ago
Hi,
In my opinion 'Gypsy Rose' is a tuff hosta because of the substance and heritage for melt out. However, it could be part of getting acclimated to your climate/garden.

Any chance of fertilizer/chemical burn? Your close up pictures look like fertilizer burn from what I have experienced here.
ken_adrian Adrian MI cold Z5
16 years ago
first pic ...

top and bottom of damage.. does NOT go vein to vein..

ergo... NOT nems ....

otherwise.. lack of water.. or sun too intense ... or it just doesnt like you this year ..

ken
greenthumbz4mn
16 years ago
I'm having the same burning out problem with Fire and Ice and also Hawkeye. I remember using Buggetta slug control a few weeks ago and as I came to the bottom of the box, I dispersed the "crumbs" willy nilly over some Hosta. Country Garden mentioned chemical burn, and I'm assuming that is what is wrong with my leaf damage. I don't even want to think about nematodes!! Mary
Wendys_garden
Original Author
16 years ago
The only product used anywhere near the hostas is Sluggo, and I was very careful not to get any on the leaves.

We've had 3 weeks of hot, humid weather so lack of water/too much sun causing melt out sounds logical. I am glad it is not diseased; she's pretty, I'd hate to lose her.

Thanks all!
countrygarden01
16 years ago
Hi,
I have experienced your problem w/ sluggo. I quit using it... I don't have a problem anymore. I also think acclimation and lack of roots are also part of it. Glad to hear it is not nematodes.

It looks as if you have a "good" layer of mulch. You could pull it back to check moisture.
Good Luck