Predarious
ones feed on other nematodes, bacteria and fungi and other minute animals
Plant parasitic
ones feed on plants and algae
Saphrophytes
s feed on dead or decaying organic matter
Nematodes
Thread-like unsegmented worms which are elongated and cylindrical in shape.
Stylet
which is a hollow needle-like spear used for obtaining nutrients from the host
Ectoparasites
feed from the outside and only the stylet enters the plant cells. They do not enter the roots.
Semi-endoparasites
feed by burying the front partof the body while the posterior portion is outside the host.
Rotylenchulus, Helicotylenchus
semi-endoparasites examples
Endoparasites
the entire nematode body enters the plant cells while it feeds.
Meloidogyne, Heterodera
endoparasites examples
Migratory
move from one part of the plant to the another portion of the host, or move from the plant to the soil and back and forth.
Radopholus similis, Ditylenchus dipsaci
migratory example
Sedentary
attached themselves to the roots or burrow into the root.
Meloidogyne, Rotylenchulus
sedentary example
Radopholus similis
Toppling disease of banana
Rotylenchulus reniformis
attacks cotton, cowpea, etc
Meloidogyne incognita
- root galls of tomato, okra rice, etc.
Heterodera schachtii
brassica vegetables, sugar beet
Ditylenchus dipsaci
(onion, garlic, carrots, peas, •potatoes, etc.
Tylenchulus semi-penetrans
- citrus root nematod
Helicotylenchus spp.
wide host range, including fruit crops, vegetables, agronomic crops, ornamental plants etc