Barley root-knot nematode.
The specific name is derived from the initials of the UK National Agricultural
Reported median body size for this species (Length mm; width micrometers; weight micrograms) - Click:
Temperate areas of the United States and Europe. Originally described
from field crops (cereals, grasses, sugarbeet) in England and Wales.
in California Nematode Pest Rating System.
In California, this species can cause
yield losses of 50-75% in barley grown under continuous cropping in the
Tulelake innermountain region.
Feeding site establishment and
development typical of genus.
Grasses, cereals, and weeds.
Egg hatch in water is very limited unless eggs have been chilled by storage
below 5C for 1 to 7 weeks (Franklin et al, 1971).
Galls are generally cylindrical, spindle-shaped, or hooked.
causes necrosis, hyperplasia, and hypertrophy of cortex; also causes
disorganization of xylem elements.
rotation can be effective in California (1 year fallow or 2
of potatoes increased barley yield - Allen, 1970).
Host Plant Resistance, Non-hosts
CIH Descriptions of Plant-parasitic Nematodes, Set 2, No. 19 (1973)
Franklin, M.T., S.A. Clarke and J.A. Course. 1971. Nematologica 17:575-590.