Wamin in decline

Controlling pests of bamboo

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paul st pete
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Wamin in decline

Post by paul st pete »

My variegated wamin is in serious decline. It looks like some type of nutrient deficiency, but I'm not sure. At first it was only on the new shoots, but now is showing up on old growth too. Has anyone seen anything like this before?
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RE: Wamin in decline

Post by bepah »

Without seeing the photos, what have you done with regard to feeding, fertilizing, etc? How's the water situation?
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RE: Wamin in decline

Post by Roy »

Pictures have arrived!

Image
Image
Image
Image
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RE: Wamin in decline

Post by Roy »

Paul,

I know that you live in St. Pete, Florida, but I have to ask anyway. Do you happen to live in a cold spot and perhaps these were new shoots that were coming up this past Winter and they got some cold/freeze damage? Just had to ask to get this one thought out of my head that perhaps that might be an answer? The rest of your foliage on the plant looks great.
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bepah
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RE: Wamin in decline

Post by bepah »

My first thought after seeing the pictures is a fungus of some sort on the newer growth. Does the wamin get water via aerial delivery? You may want to water it from the bottom if so.

When was the plant last fed/fertilized? Could it be burned from fertilizer?

Lastly, are there any changes you have made lately from your regular routine?

Thanks,
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boonut
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RE: Wamin in decline

Post by boonut »

That was my thought... fertilizer or insecticide damage. Having done that myself several times, it does look familiar. There are definitely other causes though...
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Re: RE: Wamin in decline

Post by Roy »

boonut wrote:That was my thought... fertilizer or insecticide damage. Having done that myself several times, it does look familiar. There are definitely other causes though...
I'm wondering if perhaps some type of herbicide such as Roundup got accidentally sprayed on the new culms?
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RE: Wamin in decline

Post by ghmerrill »

Possible viral infection? I have seen other types of plants react in a similar manner. My other vote would be herbicide as mentioned by the others..... do you have a neighbor who perhaps does not like bamboo.... or you? :?
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RE: Wamin in decline

Post by mantis »

Do you use Weed & Feed for your lawn?
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RE: Wamin in decline

Post by marcat »

Look real close and I mean real close for very tiny webbing. I would suspect spider mites. They get to my Tiny Fern leaf Stripe stem and the damage looks real similar. A heavy dosing with insecticidal soap my do the trick if that is what you have. the webbing is very tiny and hard to see but as I say it looks real close to the damage they do to the tiny fern leaf.
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RE: Wamin in decline

Post by dudley »

Image
Image
Image
first photo shows aborted shoot on right
second photo mature culm with all branches dieing
third photo close up of dead branches
so far other shoots look good
no insecticides or fertilizer recently.
dont see how it could be herbicide because it is an inside culm and outer ones would be damaged as well.
have not watered in a month but rain has been adequate.
any guesses?
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RE: Wamin in decline

Post by bepah »

I still think it may be a fungus......
are you having warm nights? water in the evening or morning?
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Re: RE: Wamin in decline

Post by Roy »

bepah wrote:I still think it may be a fungus......
are you having warm nights? water in the evening or morning?

He lives in Florida, so the answer is "Yes" to all three of those questions.
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bepah
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RE: Wamin in decline

Post by bepah »

I am having a fungus problem in my lawn right now, Grass fungus thrives on warm humid conditions.

Is there a fungus that is specific to bamboo or these condtions? A fungicide that might work?

What other possibilities exist here?
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