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The Parasites and Predators of Earthworms
B. The Parasites
Bacteria, protozoa (single-celled animals), flatworms, nematodes (roundworms) and dipterous larvae are internal parasites of earthworms. The cluster fly (Pollenia rudis), often a nuisance pest in house attics, parasitizes worms of the species Eisenia rosea which is often a contaminating worm in manure worm cultures. I have had no reports, though, that this parasite has been a problem in manure worm cultures.
There are other fly species which can parasitize worms, but so far I have received no reports from commercial worm growers.
http://www.wormdigest.org/content/view/200/2/
B. The Parasites
Bacteria, protozoa (single-celled animals), flatworms, nematodes (roundworms) and dipterous larvae are internal parasites of earthworms. The cluster fly (Pollenia rudis), often a nuisance pest in house attics, parasitizes worms of the species Eisenia rosea which is often a contaminating worm in manure worm cultures. I have had no reports, though, that this parasite has been a problem in manure worm cultures.
There are other fly species which can parasitize worms, but so far I have received no reports from commercial worm growers.
http://www.wormdigest.org/content/view/200/2/