The nematodes (/ ˈnɛmətoʊdz / NEM-ə-tohdz or NEEM-; Ancient Greek: Νηματώδη; Latin: Nematoda), roundworms or eelworms constitute the phylum Nematoda. Species in the phylum inhabit a broad range of environments. Most species are free-living, feeding on microorganisms, but many are parasitic.

2025年3月19日 · Nematode, any worm of the phylum Nematoda. Nematodes are among the most abundant animals on Earth. They occur as parasites in animals and plants or as free-living forms in soil, fresh water, marine environments, and even such unusual places as vinegar.

2018年7月1日 · Soil-dwelling nematodes are the most common culprits, but some species can damage plant roots, stems, foliage, and flowers. No matter where they feed, these tiny worms can seriously damage to...

Nematodes are simple roundworms. Colorless, unsegmented, and lacking appendages, nematodes may be free-living, predaceous, or parasitic. Many of the parasitic species cause important diseases of plants, animals, and humans. Other species are beneficial in attacking insect pests, mostly sterilizing or otherwise debilitating their hosts.

Nematodes are a diverse group of worms that make up the phylum Nematoda. Otherwise known as roundworms, nematodes live as either free-living organisms in terrestrial and aquatic organisms or as parasites in plants and animals.

Nematodes have been reported from every continent on earth and occur in deserts, swamps, the oceans, the tropics and Antarctica. Usually nematodes are invisible to all but a few specialists because most are microscopic and transparent. How many nematodes are there?

To today’s experimental biologists, the best known nematode is Caenorhabditis elegans, one of the major model organisms for genetic and biomedical research, the first metazoan with a sequenced genome and a key partner in the winning of three Nobel prizes — for the discoveries of programmed cell death and RNA interference, and for the ...

2024年10月1日 · Nematodes are a diverse group of organisms known for their elongated, cylindrical bodies and unsegmented structure. These worm-like creatures are found in various environments, with many species inhabiting soil and water.

Nematodes are unsegmented roundworms that belong to the phylum Nematoda, within the super-phylum Ecdysozoa, along with arthropods and other organisms that build and shed cuticle, in a process called ecdysis (Aguinaldo et al., 1997). Nematodes are not only highly diverse, but also complex and biologically specialized metazoans.

There are 28000 species of Nematoda identified till date. They are unsegmented vermiform animals. The epidermis has dorsal and ventral nerve cords. The Nematodes present in the soil feed on the bacteria, fungi, and other nematodes, and play an important role in nutrient recycling. They also attack the insects and control the pests.