Spots on culms

Controlling pests of bamboo

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webgator
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Spots on culms

Post by webgator »

Anyone care to venture what this is? It's becoming quite prevalent on the older culms of my B. Dissemulator

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bambootony
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Re: Spots on culms

Post by bambootony »

I'm new here... Go ask Mr. Owl!!! :drunken:
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Re: Spots on culms

Post by webgator »

Anyone else?
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Re: Spots on culms

Post by foxd »

It might be some sort of fungus judging from the trace of white inside what appears to be a burn spot. Very weird looking.
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Re: Spots on culms

Post by mantis »

Could be sunburn. I haven't had it happen, but I have received plants that the culms were black.
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Re: Spots on culms

Post by mr.mike »

I've got lots of that on many different plants. The ones with the spots are in full sun. I agree w/ mantis, it's sunburn.

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Re: Spots on culms

Post by David »

I'm going with insect borne virus. The insect carries the virus nibbles on the culm, and bingo infected. It appears that all of the lesions have a central point and an outward spread. Whatever it is starts in the middle, and then spreads equally toward the borders.
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Re: Spots on culms

Post by webgator »

I have to disagree about the sunburn. These are all on the older culms on the inside of the clump, that majority of which does not get much sun at all. It's at various parts of the culms, even in locations that face the fence and I know for fact this part gets no direct sunlight. This same spotting is on some of the branching as well. Here's a wide angle pic showing the location of the bamboo with the problems....

Clump 1

Image

Clump 2

Image

I circled some of the spots facing the camera in the second pic, but again, these spots are in spots that get very little direct sunlight.
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Re: Spots on culms

Post by foxd »

Can you examine the spots under a microscope?
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Re: Spots on culms

Post by bambootony »

Hello webgator,
I found this on the net.
http://www.ehow.com/how_5014854_cure-bl ... lants.html
I typed in black spots on plants into my google..
Hope this helps?????
From Bamboo Tony
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Re: Spots on culms

Post by webgator »

foxd wrote:Can you examine the spots under a microscope?
I imagine I could if I had a microscope... :|
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Re: Spots on culms

Post by webgator »

bambootony wrote:Hello webgator,
I found this on the net.
http://www.ehow.com/how_5014854_cure-bl ... lants.html
I typed in black spots on plants into my google..
Hope this helps?????
From Bamboo Tony
Thanks Tony, but I think this might be a little different than black spot fungus found on the leafs of plants. I was hoping that maybe someone else here on the forum has seen this on their bamboo and would know exactly what it is. Certainly I am not the first one to come across this.
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Re: Spots on culms

Post by bambootony »

Hey webgator,
I would try the remidy anyway...???
It should not hurt the boo...???
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Re: Spots on culms

Post by moriphen »

I vote mold, take a cutting to your local university biology department. Perhaps they will look at with tools and knowledge we don't have available.
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Re: Spots on culms

Post by webgator »

If it ever stops raining I'll try some fungicide. At the extreme I might thin out all the older, smaller culms and dispose of them before any treatment.

My wonderment though is out of the 15 bamboos in my yard, this bamboo is the only with these spots.
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