Author Topic: Malformation on Jakfruit Roots  (Read 314 times)

FMfruitforest

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Malformation on Jakfruit Roots
« on: January 06, 2023, 02:56:09 PM »
Seedling Jackfruit grown in container has malformation on roots, what could be the cause?


Jaboticaba45

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Re: Malformation on Jakfruit Roots
« Reply #1 on: January 06, 2023, 03:12:41 PM »
Looks like it could be root knot nematodes. The soil is probably infested with them:

TonyinCC

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Re: Malformation on Jakfruit Roots
« Reply #2 on: January 06, 2023, 04:40:12 PM »
I think those might be nodules of nitrogen fixing bacteria. I saw a reference to a research article about nitrogen fixers on Jackfruit but couldn't read article. If the tree was sickly my first thought might be nematodes, but I have dug up healthy feeder roots 20 feet from a tree with some small woody nodules on them. I have several legumes as ground covers in the area including sunshine mimosa. I think my Jackfruit must have picked up a compatible bacterial species. Some fungi are also known to produce root nodules that also give nitrogen to tree roots.
« Last Edit: January 06, 2023, 04:49:51 PM by TonyinCC »

FloridaManDan

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Re: Malformation on Jakfruit Roots
« Reply #3 on: January 06, 2023, 05:26:06 PM »
Honestly thats a spooky sight. I believe that is Root Knot Nematode; I don't think that many galls would form from nitrogen-fixing bacteria at this stage of its development. It may not look sickly for awhile even with that many root knots.
2 good ways to check: Press a thumbnail into it- if its root knot, its hard; if its NFB gall, itll be easy to press into. Also, look at the surrounding soil and see how your other plants are doing!

Hope im wrong, good luck.

kapps

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Re: Malformation on Jakfruit Roots
« Reply #4 on: January 06, 2023, 07:34:24 PM »
I agree with nematodes. My papaya had similar looking roots when it was pushed over during a hurricane this year.

Galatians522

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Re: Malformation on Jakfruit Roots
« Reply #5 on: January 06, 2023, 07:56:43 PM »
I'm pretty sure those are nematode galls. I don't think notrogen fixing nodules get that large.

Jaboticaba45

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Re: Malformation on Jakfruit Roots
« Reply #6 on: January 06, 2023, 08:08:32 PM »
I believe if itís beneficial bacteria you can rub the galls of easily. RKN is pretty common in FL. May want to try to add beneficial nematodes to counter them?

cassowary

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Re: Malformation on Jakfruit Roots
« Reply #7 on: January 06, 2023, 10:43:47 PM »
FM,
Are you sure you didn't sow Plectranthus potato?


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FMfruitforest

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Re: Malformation on Jakfruit Roots
« Reply #8 on: January 07, 2023, 08:18:02 AM »
Yes the bulbs are hard to the touch, the tree was in container in native soil mixed from yard, the tree was pushing new growth and look to be overall in good health but it did not exhibit the vigorous growth other seedlings have shown.

 

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