Reported median body size for this species (Length mm; width micrometers; weight micrograms) - Click:
Europe; SAFS field site, Davis, CA.
in California Nematode Pest Rating System.
Fungal-feeding nematode. Component of fungal-mediated decomposition
Dish and column microcosms containing alfalfa-sand medium, two fungi (Rhizoctonia
solani and Botrytis cinerea) and two nematodes (Aphelenchus
Aphelenchoides composticola) were incubated at 15, 20, 25
and 29° C for 21 days.
In the dish microcosms, hyphal growth rates of both fungal species increased
with temperature in the range of 15-25 ° C. Above
that temperature range the growth rate of R. solani remained almost
constant while that of B. cinerea decrease considerably. The population
growth rate of A. avenae increased with temperature between 15 and 29
° C on colonies of R. solani and B. cinerea
in dish microcosms. The growth rate of A. composticola also increased in
the range of 15-25 ° C but decreased greatly beyond
that temperature range independent of the fungal species as food source.
Inorganic N (NH4+ + NO3-) was
collected from each column microcosm by leaching every three days. In the
columns containing R. solani, there was a significant effect of
temperature on the amount of N detected in the fungus+A avenae or A.
composticola but not in the fungus alone columns. The total amount of N was
greatest at 29 ° C for A. avenae and at 20°
C for A. composticola columns, concurrent with the population growth
rates of the nematodes. In the columns containing B. cinerea the effect
of temperature on the amount of inorganic N was not significant in either the
fungus alone or fungus+nematode columns, although the population growth rates of
the both nematode species were highest at 20° . For
B. cinerea the N amount across temperatures was the same or larger for
the fungus alone as for the fungus+nematode columns.
In general, the contribution of fungal-feeding nematodes to N mineralization
was small in any combinations of fungus and nematode species at any temperature.
Similarity in C/N ratio of the fungal and nematode biomass, organic substrate
C/N ratios too low for measurable increase in net mineralization by the
nematodes and small reproduction of the nematodes in the column microcosms were
probable contributory factors (Okada and Ferris, 2001).
feeds on a variety of fungi (Giannakis and Sanders, 1989; Mankau and
Mankau, 1963; Okada and Ferris, 2001), but is not known to feed on higher plants
The growth rate of A. composticola increased in the range of
15-25 ° C but decreased greatly beyond that
temperature range (Okada and Ferris, 2001).
Chen, J. and H. Ferris. 2000. Growth and nitrogen
mineralization of selected fungi and fungal-feeding nematodes on sand amended
with organic matter. Plant and Soil 218:91-101.
Giannakis N and Sanders F E 1989 Interactions between
mycophagous nematodes, mycorrhizal and other soil fungi. Agric. Ecosyst.
Environ. 29, 163-167.
Hesling J J 1977 Aphelenchoides composticola. In C. I.
H. Descriptions of Plant-Parasitic Nematodes. Eds. S Willmott, P S Gooch, M R
Siddiqi and M T Franklin. Set 7, No. 92. Commonwealth Agricultural Bureaux,
Farnham Royal, Slough, U.K.
Mankau R and Mankau S K 1963 The role of mycophagous nematodes
in the soil. The relationships of Aphelenchus avenae to phytopathogenic
soil fungi. In Soil Organisms. Eds. J Doeksen and J van der Drift. Pp
271-280. North Holland, Amsterdam, The Netherlands.