Hallow Everybody

I will be grateful if someone can provide information as to how to differentiate between root nodules made my Nematodes and Nitrogen fixation bacteria. While repotting a Chinese elm and a Ficus benghalensis, I found some nodules in the roots. Some plant growers say these are nests of Nematodes (Eel Worms) while the others say these are Nitrogen fixation bacteria nests. Both the plants are otherwise growing normally.

Regards

Anil Kaushik
Bonsai Club (India)
Chandigarh.

Anil:

Nina is best qualified to address this question. I have NEVER encountered nitrogen-fixing nodules with Elms. I have had encounters with Root Knot Nematodes. In this instance, the nodes were attached very closely to the roots at the base of the trunk.

If you have Nematodes, chopped Sesame Root(Nematrol) can be used or methyl bromide (nematicide). Also, if the tree has Nematodes, you will see leaves start to wilt.

You will need to make a positive identification. If the tree has nematodes, you will need to remove them, remove the old soil, repot, and then treat the specimen. The tree can be saved most likely.

Cordially,

Michael Persiano
members.aol.com/iasnob

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