The constricting action of these rings is so powerful that the nematode is almost cut in half. Sticky networks are less theatrical than constricting rings, yet they have their own brand of terror. In both cases, the captured worm first struggles wildly and then seems to become comatose. The fungus then sends its filaments into the worm and digests it. When it has obtained sufficient nutrients from its prey the fungus reproduces by producing clusters of conidia at the tops of long conidiophores.
Arthrobotrys species are common in soil and decaying plant debris.
They are undoubtedly important in controlling numbers of nematodes, including those causing damage to agricultural crops. To study them it is necessary to first have a culture of nematodes. We maintain them on a weak medium spread with yeast or bacteria. Pea soup mix also seems to be good food for nematodes. To see Arthrobotrys , a pinch of soil is introduced into the nematode culture.