Are nematodes good or bad?
As Mark alluded to there are beneficial nematodes and there are not beneficial nematodes. It depends on what you have and what you are growing and what other thingys you have in your soil. Just like everything else you want a balance, many of the “bad” nematodes are a food source for other beneficial insects and organisms so in that sense they are “good”, but if they are out of control and are consuming your plants, then they are totally bad and you probably need to control them. Otherwise, you really need do nothing except understand that they are there.
