How do you identify root-knot nematode?
Root-knot nematodes can be identified to species using a number of techniques, but one common method is perineal pattern analysis (Figure 19). The perineum (the region surrounding the vulva and anus) of female nematodes displays a pattern of ridges and annulations for each species.
What is the meaning of Meloidogyne incognita?
root-knot nematode
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.
What is the common name of Meloidogyne incognita?
Southern root-knot nematode
Map to
| Mnemonic i | MELIC |
|---|---|
| Common name i | Southern root-knot nematode |
| Synonym i | – |
| Other names i | ›Meloidogyne incognita (Kofoid & White, 1919) ›Meloidogyne incognita acrita ›Meloidogyne incognita acrita Chitwood, 1949 ›Meloidogyne incognita ssp. acrita ›Meloidogyne sp. R32 More » ›Meloidogyne sp. R37 Less |
| Rank i | SPECIES |
What is the meaning of Meloidogyne?
The name Meloidogyne is derived from two Greek words meaning “apple-shaped” and “female”.
How do you differentiate a nodule from a root gall?
These swellings, called nodules, are easily distinguished from root-knot galls by differences in how they are attached to the root and their contents. Nodules are loosely attached to the root, while root-knot galls originate from infection at the center of the root, so they are an integral part of the root.
How do you identify nematodes?
Important morphological identification characters in nematodes include shape of head, number of annules, body length, length of stylet, shape of stylet knob, structure of lateral fields, presence/absence and shape of spermatheca, shape of female tail terminus, shape and length of spicule and gubernaculum [26].
How does meloidogyne work?
Root-knot nematodes are plant-parasitic nematodes from the genus Meloidogyne. Root-knot nematode larvae infect plant roots, causing the development of root-knot galls that drain the plant’s photosynthate and nutrients. Infection of young plants may be lethal, while infection of mature plants causes decreased yield.
How many species of Meloidogyne are there?
The root-knot nematodes of the genus Meloidogyne are highly adapted, obligate plant parasites, consisting of nearly one hundred valid species, and are considered the most economically important group of plant-parasitic nematodes.
How does Meloidogyne work?
Which part of tobacco plant is infected by Meloidogyne incognita?
– Meloidogyne incognita infects the roots of tobacco plants. Plant-parasitic nematodes from the genus Meloidogyne are root-knot nematodes.
How do you differentiate root-knot disease and root nodules of legume plants?
The appearance of the galls on the roots can be confused with nitrogen-fixing nodules common in the legume family. However it is easy to distinguish between them, as the nitrogen nodules can be easily rubbed off while the nematode galls cannot be removed.
What are the white nodes on the roots?
Those balls on roots are Nitrogen fixing root nodules. Nitrogen fixing root nodules transform environmental nitrogen into nitrogen for the soil. And, by adding nitrogen to the soil, this provides a key nutrient to plant roots.
Is the Meloidogyne incognita difficult to identify?
Species: Meloidogyne incognita Meloidogyne species may be difficult to identify with certainty due to their inherent variability. Adult females and infective juveniles should be examined before making an identification.
How is Meloidogyne haplanaria different from other root knot nematodes?
The major diagnostic criteria to distinguish Meloidogyne haplanaria from other closely related root-knot nematode species are based on morphological differences and host range tests, which are time consuming and labor intensive and require living or well-preserved specimens.
What kind of crops can Meloidogyne haplanaria parasitize?
Host range studies revealed that Meloidogyne haplanaria can parasitize several legume and crucifer crops including peanut, garden pea, and radish (Eisenback et al. 2003, Bendezu et al. 2004).