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This root-knot nematode is sedentary endoparasitic nematode. Second-stage juveniles (J2) penetrate host roots where they establish a specialized feeding site (giant cells) in the stele. As J2 develop, they cause root swellings and become swollen females. Females rupture root cortex and sometime protrude with the egg masses from the root surface.
In terms of feeding strategy, Nacobbus is classified as a false root-knot nematode because it is both migratory endoparasitic and sedentary endoparasitic. [4] It is the only known nematode to do so; all others employ either one strategy or the other. In Nacobbus, each strategy is employed at different stages in the life cycle. [5]
Although many other parasitic thread worms cause diseases in living organisms (sterilizing or otherwise debilitating their host), entomopathogenic nematodes are specific in only infecting insects. Entomopathogenic nematodes (EPNs) live parasitically inside the infected insect host, and so they are termed as endoparasitic.
The CCN is a sedentary endoparasitic nematode, establishing feeding sites in the roots of host plants near the vascular tissue. Like other cyst nematodes, CCN feeds from a specialized feeding site known as a syncytium. This feeding site is formed by the deterioration of cell walls of adjoining plant cells in response to elicitors delivered ...
Heterodera sacchari, [1] [2] the sugarcane cyst nematode, mitotic parthenogenic sedentary endoparasitic nematode. This plant-parasitic nematode infects the roots of sugarcane , and the female nematode eventually becomes a thick-walled cyst filled with eggs.
These symptoms of nematode damage on peanut plants range from stunting, yellowing, wilting and even plant death. [9] Ferris (1999–2012), also reported that nematodes cause yellowing; mid-day wilting; symptoms of water and nutrient stress; and sometimes death, especially if the nematode is interacting with other organisms. [7]
Aphelenchoides ritzemabosi is an endoparasitic nematode, meaning that it feeds on plant tissue from the inside of the cell. [6] Adult nematodes infest the leaves of their host plant by swimming up the outside of the stem in a film of water. This can only happen when the relative humidity is very high. [7]
Meloidogyne incognita (root-knot nematode, RKN), also known as the southern root-nematode or cotton root-knot nematode is a plant-parasitic roundworm in the family Heteroderidae. This nematode is one of the four most common species worldwide and has numerous hosts. It typically incites large, usually irregular galls on roots as a result of ...