This pest is is not known to be a vector and it is not vectored by any organism.

Laboratory methods that are acceptable for cyst extraction include sugar centrifugation, USDA cyst extractor, Fenwick can sieving, wet sieving, and elutriation.

Mature females and cysts are just visible to the naked eye and can be seen as minute, white, lemon-shaped bodies on the root surface.

In general, wheat plants become chlorotic and stunted due to the presence of cereal cyst nematodes. Growth may be patchy. Barley roots exhibit no readily discernable symptoms. Leaf tips often become discolored: reddish yellow on wheat, red on oats, and yellow on barley.

In Oregon, patches of stunted seedlings (3-5 leaf stage) appeared in March and exhibited chlorotic or necrotic lower leaves, healthy younger leaves, few or no tillers, rotting of lower culms and crown, and light brown roots with little or no branching.

Morphological: Keys are available for identification by morphological characteristics of the cyst, second-stage juvenile, male, and female.

Handoo (2002) provides a key to the species within the H. avenae group, as well as a thorough review of morphological studies to date.

H. filipjevi has been confused with several other cyst nematode species that parasitize cereals, including (but not limited to) H. avenae, H. bifenestra, H. hordecalis, H. latipons, H. mani, H. pakistanensis, H. tucomanica, and H. zeae.

Symptoms are often due to mixed populations of cereal cyst nematodes or other soilborne pathogens and can mimic other problems such as nutrient deficiencies or drought stress.

For precise identification, other methods are used such as (1) protein electrophoresis, (2) isozymes/ isoelectrofocusing (Andres et al., 2001), and (3) molecular biology techniques, such as polymerase chain reaction (PCR), restriction fragment length polymorphism (RFLP), random amplified polymorphic DNA (RAPD), and sequences of internal transcribed spacer ribosomal DNA (ITS-rDNA) (Bekal et al., 1997; Ferris et al., 1999; Andres et al., 2001; Nicol, 2002; Tanha-Maafi et al., 2003; Rivoal et al., 2003; Subbotin et al., 1999; Subbotin et al., 2001; Subbotin et al., 2003; Madani et al., 2004; Abidou et al., 2005; Yan and Smiley, 2010), and species-specific PCR (Peng et al., 2013; Toumi et al., 2013; Yan et al., 2013).

H. avenae, H. filipjevi, and H. latipons were also differentiated by electrophoresis on cellulose acetate plates using the enzymes esterase and malate dehydrogenase and aliquots of 25 females (Mokabli et al., 2001).

H. filipjevi has been detected in Oregon and Washington state.