I was battling with fireants in my raised bed, and I tried quite a few different non-chemical things and the last that I tried was coffee grounds. Then I found that they found some hole somewhere and went under the coffee grounds to setup their new home there. I started digging everywhere to disturb them and of course at the same time I destroyed some of my plant roots. :-( And as I was turning the soil over (mostly the top layer which was coffee grounds), I found a lot of little white worms that I had never seen before. They are too small to take pics to show. What are they? Are they harmful to my plants (okra, watermelon, kabocha squash)? I had previously put worm castings down before I covered the whole raised bed with a thick layer of coffee grounds because those fireants made me mad!! But there were zero worms in the worm castings and it had been sitting in the sun for a long time, so I thought if there were worms, they would be dead by the time I put the worm castings in my raised bed.

So what are those little white worms? What should I do?