Is this RKN?

Very likely.

Yep, it would appear so.  You know what sucks?  Say you up-potted 10 plants and the first one showed these signs... If you transferred any microscopic soil particles from this plant to any of the other plants or pots (which is likely), every other plant is probably infected, and anywhere the soil particulate goes will start breeding RKN when it gets to other soil.  If you ever re-pot a plant in the same pot this was in OR in the ground near where this pot sat OR you reuse ground soil from the area this was, whatever comes in contact with it will be infected.

Are their pesticides that can kill these nematodes?
Suzi

How does it affect figs and plants.  This was in a potted fig that I root pruned.  The tree must have been in the same pot for at least 10 years and was doing fairly well.     

Figmatic,

"was doing fairly well."?

How is it doing now?

If it  has no obvious new problems, you may not have RKN.

Like everything else in life, RKN is relative. Major infestations will kill the tree pretty quickly.

Mild infestations might slow growth, fig production etc at varying levels.

I would probably pull  up some of your other potted figs and examine the roots for signs of  RKN.

Keep your fingers crossed.

Most of my figs are not at this house. I root pruned it after it had leafed out. Actually, I'm not sure this fig ever lost it's leaves at all since it's a very mild climate in coastal So Ca. It had figs every year, but not profuse like some of the pix I have seen of others. After reading about root pruning on this site, I decided to try it. Plus, someone in my family put some oxalis (I think it's called that--they look like large shamrocks) in the pot with the figs and the oxalis grew like weeds as they probably are weeds. I tried to wash off all the dirt and get rid of all the tubers from the oxalis and repotted. After pruning and repotting, all the leaves fell off and have not grown back. Most of the tips are showing signs that they are going to emerge soon. Now I'm worried because I washed some of the old soil into my garden. Fortunately, it wasn't part of the garden where my prized plants are but it is connected to the rest of the yard so now I am worried.

Major infestations will stunt or slow growth, less fruiting, etc.  If you have a vigorous tree, you may not notice an RKN infection based on top growth.  If you have a slow grower with RKN infection, it may stop new growth.  Never seen RKN kill anything though.  I'm down to my last tree to airlayer now.  The trees that I have airlayers sprung to life.

Grubs can get in too. 

Ps - on the question of whether or not there are pesticides for RKN.... Sort of?  Industrial chemicals, I don't think there are any home solutions.

Are all the roots on this plant the same? This one seems to be older with hardly any new root growth. I see two short pieces of new root growth. You say the tree looks good, but I don't know how possible with no new root growth. I think that an air layer would be a good thing to do if you like this fig, as Jason stated he did with his. I would also check all your other plants as stated earlier to make sure their clean. I remember reading somewhere on this site about an experiment, want to say Olga, not sure about spelling or even if it was her or not. I not sure how it turned out but would like to know. If someone recalls of this maybe they might chime in for help.


luke

Recently Ingevald experimented with soaking his RKN-infected roots in scalding hot water for a period of several minutes (30?) and claimed this killed all RKN and eggs.  This is an impractical solution for any sizable tree over a couple years old, though.

Some of the roots have these bumps and some don't. I did a severe root pruning and this was a small piece. I noticed these nodes when i did root pruning, but didn't know much about rkn and hoping if i ignored it, then i wouldnt have to deal with it.

I potted up a few of the roots to see if I could start new trees from roots. This was several months ago. This one has a couple new roots now.. I pulled it out of pot the other day since and saw a couple small new roots. I had taken cuttings from this tree anyways and they are growing like crazy this year.

There are a few threads at both forums about growing trees from roots (not possible, supposedly because of an absence of correct cells to generate bark)).