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What are nematodes?
SASPP The South African Society of Plant Pathologists promotes Plant Pathology in Southern Africa by acting as the official mouthpiece of Plant Pathologists in Southern Africa
IFNS The International Federation of Nematology Societies serves as a worldwide interface for Nematology societies promoting communication, education, research and outreach
ARC The Agricultural Research Council promotes the agricultural and related sectors through research, technology development and transfer.
SON The Society of Nematologists is an international organization formed to advance the science of nematology in both its fundamental and economic aspects.
PRF The Protein Research Foundation's main objectives are to replace imported protein for animal use with locally produced protein, but also to promote better utilisation of protein. These objectives are promoted through funding research and technology transfers.
IAPPS The International Association for the Plant Protection Sciences strives to insure production of sufficient quality of food/feed/fiber for a growing world population and to advocate implementation of sustainable plant health management strategies.
Nematodes (also called eelworms or roundworms) are the most abundant multicellular animals on earth. They belong in the Phylum Nematoda of the kingdom Animalia. Nematodes are found in large numbers in films of water in all natural soils, in fresh and marine waters from the polar regions to the equator, in humus and decaying plant tissues, and as parasites in moist tissues of most groups of animals, ranging from other nematodes, earthworms, insects, and molluscs to livestock, household pets, and humans
Many species that infect vertebrate animals and humans can be more than 5 cm long and are visible without magnification. Free-living microbe-feeding nematodes and plant-infecting species, most of which are in range of 0.5 to 2 mm long, generally cannot be observed in detail without a microscope.
Nematodes are mostly
microscopic and generally translucent and thus nearly impossible to see
in the soil, except for the females of some species, which swell and become
pyriform, reniform, saccate, or lemon-shaped in the adult stage. Most
plant-parasitic are elongate and threadlike throughout their life cycles,
and all are of this morphology when they hatch from the egg. Only about
10% of all described nematode species are plant parasites. About 15% are
animal parasites, about 50% are marine nematodes, and 25% are free-living.
From: Diagnosing plant diseases caused by nematodes by Malcolm C. Shurtleff and Charles W. Averre III, published by the American Phytopathological Society.