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Main Banana Discussion This is where we discuss our banana collections; tips on growing bananas, tips on harvesting bananas, sharing our banana photos and stories.


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Old 10-14-2017, 05:34 AM   #1 (permalink)
 
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Default Banana corm disaster!

Hi, some advice needed...I've had 2 banana suckers grow strongly then suddenly stop..when dug up, I've found the inner corm has disappeared leaving only a shell (see pic). The stem is still firmly attached to the corm, but the inner corm has rotted away..there is no presence of grubs/bugs and I'm not in a commercial banana-growing area so there shouldn't be any banana-specific fungus...
I'm a little perplexed as I've always had incredible success with banana plants. This has only occurred on Cavendish - I have several Gros Michel nearby and they are fine/unaffected. They were planted in a dry-ish area and have never been particularly vigorous..

Any ideas?
Thanks
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Old 10-14-2017, 11:50 AM   #2 (permalink)
 
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Default Re: Banana corm disaster!

Hard to tell in the photos. Either corm rot from water, fungal rot or Corm weevils damage. Its easier to diagnose before they get that funky.


Get new, clean, material and try again.
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Old 10-14-2017, 03:47 PM   #3 (permalink)
 
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Default Re: Banana corm disaster!

Quote:
Originally Posted by Juicy Bananas View Post
Hard to tell in the photos. Either corm rot from water, fungal rot or Corm weevils damage. Its easier to diagnose before they get that funky.


Get new, clean, material and try again.
Thank you!
What are the signs? I've noticed they go from growing vigorously to just completely stopping.

I think it must be one of the first two. I did't see any evidence of weevils..
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Old 10-14-2017, 06:24 PM   #4 (permalink)
 
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Default Re: Banana corm disaster!

When did this happen, before or after being separated for mama plant? Were the pups in the ground or potted?
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Old 10-27-2017, 05:23 AM   #5 (permalink)
 
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Default Re: Banana corm disaster!

Plot Twist - I stuck the plants with rotten corms in a bucket of water and the parts that aren't rotten are growing roots. Now if the corm had rotted due to cold or a virus, surely the water would worsen that rotting. Is it possible they rotted due to being too dry? I know that sounds odd, but they were in a dry, shady spot..
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Old 10-27-2017, 06:21 AM   #6 (permalink)
 
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Default Re: Banana corm disaster!

I doubt being 'too dry' was the problem. The Plant would have died back, but the corm and lower pstem would be intact. .... However, being dry may be the cause for ground varmints to eat the corm for moisture. Look for signs of molds, gophers, and others. ... I have seen corms that grew with a hollow inside.
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Old 10-27-2017, 07:21 AM   #7 (permalink)
 
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Default Re: Banana corm disaster!

Did you cut into the corm to look for tunneling? After weevils or nematodes do their work, fungi and other things eat the rest away... I am having similar issues and haven't found a certain cause yet. I had tunnels in my corm, but another I had was beginning to hollow out like yours. I trimmed them up and soaked in bleach water then replanted. The first one I treated in such a way seems to be recovering. It's too early to tell with the second one. Funny side note I learned while researching banana specific nematodes... Gros Michel, the one variety which seems extra susceptible to everything, is said to be resistant. Go figure... Most the rest of that list is made up of seeded varieties.
See here for more detailed info...
I guess I am now a banana surgeon... Any ideas what it is?
Here is the first one... It had a big hole forming on the bottom of the corm, so it was getting hollow. I now wish I had cut it like I did the Paggi, but it seems to be doing well so far....


Maybe try putting a cup of bleach in about 3 gallons of water and soak it for half an hour, then replant...
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https://sputinc7.wixsite.com/covwc

Varieties I supposedly bought: Manzano, Cavendish, Blue Java, Sweetheart, and Gros Michel.
What it seems I actually have: Brazilian, Cavendish, Namwah, Dwarf Red, Gros Michel, Pisang Ceylon, Veinte Cohol and SH 3640, and American Goldfinger. FHIA 1, Paggi and FHIA 17... Always room for one more.

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Old 10-27-2017, 03:58 PM   #8 (permalink)
 
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Default Re: Banana corm disaster!

Quote:
Originally Posted by sputinc7 View Post
Did you cut into the corm to look for tunneling? After weevils or nematodes do their work, fungi and other things eat the rest away... I am having similar issues and haven't found a certain cause yet. I had tunnels in my corm, but another I had was beginning to hollow out like yours. I trimmed them up and soaked in bleach water then replanted. The first one I treated in such a way seems to be recovering. It's too early to tell with the second one. Funny side note I learned while researching banana specific nematodes... Gros Michel, the one variety which seems extra susceptible to everything, is said to be resistant. Go figure... Most the rest of that list is made up of seeded varieties.
See here for more detailed info...
I guess I am now a banana surgeon... Any ideas what it is?
Here is the first one... It had a big hole forming on the bottom of the corm, so it was getting hollow. I now wish I had cut it like I did the Paggi, but it seems to be doing well so far....


Maybe try putting a cup of bleach in about 3 gallons of water and soak it for half an hour, then replant...
Interesting! Was the one in the pic that is starting to hollow out attacked by nematodes?
I couldn't find any evidence of any grubs; even in another banana corm which just started to rot - it had a soft spot in the corm but no evidence of grubs of any sort...
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Old 10-27-2017, 08:46 PM   #9 (permalink)
 
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Default Re: Banana corm disaster!

I don't know what the culprit is yet. I wish I knew, knowing is half the battle, except with nematodes where your only option is to move and start over with new plants because you just lose.
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https://sputinc7.wixsite.com/covwc

Varieties I supposedly bought: Manzano, Cavendish, Blue Java, Sweetheart, and Gros Michel.
What it seems I actually have: Brazilian, Cavendish, Namwah, Dwarf Red, Gros Michel, Pisang Ceylon, Veinte Cohol and SH 3640, and American Goldfinger. FHIA 1, Paggi and FHIA 17... Always room for one more.
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Old 11-07-2017, 02:25 AM   #10 (permalink)
 
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Default Re: Banana corm disaster!

I also had problems with internal corm rot last year. There was no evidence of corm weevil or nematode damage. The cause was probably fungal rot from too much water.
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