Beneficial nematodes and the bacteria they spread are not known to be harmful to humans, animals, plants, earthworms or other non-target organisms, but they do aggressively pursue insects like grubs. ... The nematodes carry an associated bacterium (Photorhabdus species) that kills insects fast (within 48 hours).

Do nematodes eat earthworms?

Considering the small size of free-living and plant-parasitic nematodes, they are inevitably ingested by other organisms, mainly by earthworms [25].

What will nematodes kill?

These types actually combat a variety of pest species, including weevils, clearwing borers, cutworms, sod webworms, chinch bugs, and white grubs. Nematodes attack and kill these insects by either injecting deadly bacteria or entering the host, parasitizing, and then feeding on it.