Heterodera Glycines

The soybean cyst nematode (SCN), Heterodera glycines, poses the greatest problem to the normal soybean crop development and yield in the principal producing countries worldwide (Ichinohe, 1988; Noel, 1992, 1993; Noel, Mendes, & Machado, 1994; Young, 1996; Kim, Riggs, Robbins, & Rakes, 1997).

This species has a high reproductive potential, an efficient dispersal mechanism, populations with marked variability, and the capacity to survive in the soil for several years in the absence of a suitable host (Riggs & Wrather, 1992).

Up to the end of the 1990s, the greatest problems in soybean crops caused by nematodes in Argentina were attributed only to species of the genus Meloidogyne (March, Ornaghi, Beviacqua, Astorga, & Marcellino, 1985; Doucet & Racca, 1986; Doucet, 1993). However, during the 1997/98 cropping season fields strongly attacked (Fig. 2) by representatives of the genus Heterodera were detected in different localities of the provinces of Córdoba and Santa Fe (Doucet et al., 1997; Baigorri, Vallone, Giorda, Chaves & Doucet, 1998). Subsequent studies showed that the species attacking soybean was H. glycines (Doucet & Lax, 1999).

Table 1. Genera and species of nematodes detected in soils cultivated with soybean in Argentina.

Nematode

References

Aorolaimus sp. Aphelenchoides sp.

Aphelenchus sp. Boleodorus sp. Belonolaimus longicaudatus Cactodera sp. C. cacti Coslenchus sp. Criconema sp. Criconemella ornata Ditylenchus sp. Filenchus sp. Globodera sp. Helicotylenchus sp.

H. dihystera H. multicinctus Hemicycliophora sp. Heterodera sp. H. glycines Ibipora sp. Lelenchus sp. Macroposthonia sp. Meloidogyne sp.

M. arenaria M. incognita

M. incognita (race 2) M. javanica

Neopsilenchus sp. Nothocriconema sp. Paratrichodorus sp. P. minor Paratylenchus sp.

Pratylenchus sp.

Doucet and Racca, 1986

Doucet and Racca, 1986; Niquén Bardales and Venialgo Chamorro, 2004

Niquén Bardales and Venialgo Chamorro, 2004 Doucet and Racca, 1986 Doucet, 1998

Doucet and Racca, 1986; Costilla and Coronel, 1998a, 1999a

Costilla and Coronel, 1998a, 1999a

Doucet and Racca, 1986

Doucet and Racca, 1986

Doucet, 1998

Niquén Bardales and Venialgo Chamorro, 2004

Niquén Bardales and Venialgo Chamorro, 2004

Niquén Bardales and Venialgo Chamorro, 2004

Doucet and Racca, 1986; Costilla and Coronel, 1999a; Vega and Galmarini, 1970; Coronel, Ploper, Jaldo, and Gálvez, 2004a;

Niquén Bardales and Venialgo Chamorro, 2004; Fuentes,

Salines, Distéfano, Gilli, and Mazzini, 2006

Doucet, 1998

Costilla and Coronel, 1998a

Niquén Bardales and Venialgo Chamorro, 2004

Baigorri et al., 1998

Costilla and Coronel, 1998a, 1999a, 1999b; Doucet and Lax, 1999 Niquén Bardales and Venialgo Chamorro, 2004 Doucet and Racca, 1986 Coronel et al., 2004a

Astorga, Ornaghi, March, Beviacqua, and Marcellino, 1984; Ornaghi, Boito, and López, 1984; Coronel et al., 2004a; Niquén Bardales and Venialgo Chamorro, 2004 Baigorri et al., 2004

Ornaghi, Beviacqua, March, and Astorga, 1981; March et al., 1985; Doucet and Racca, 1986; Doucet and Pinochet, 1992; González, Cap, and Andreozzi, 1983; Costilla and Coronel, 1998a; 1999a; Fuentes et al., 2006 Ornaghi et al., 1984

Doucet and Racca, 1986; Doucet and Pinochet, 1992; Costilla,

1994; Costilla and Coronel, 1998a, 1999a; Fuentes et al., 2006

Niquén Bardales and Venialgo Chamorro, 2004

Fuentes et al., 2006

Doucet and Racca, 1986

Doucet, 1998

Doucet and Racca, 1986; Niquén Bardales and Venialgo Chamorro, 2004

Doucet and Racca, 1986; Costilla and Coronel, 1999a; Coronel et al., 2004a; Niquén Bardales and Venialgo Chamorro, 2004

(continued)

Table 1 (continued)

Nematode

References

P. agilis

Doucet and Racca, 1986

P. brachyurus

Doucet and Racca, 1986; Costilla and Coronel, 1998a

P. delattrei

Doucet and Racca, 1986

P. goodeyi

Costilla, 1994

P. hexincisus

Doucet and Racca, 1986; Doucet, 1988

P. neglectus

Doucet and Racca, 1986

P. penetrans

Doucet and Racca, 1986

P. pratensis

Costilla, 1994

P. scribneri

Doucet and Racca, 1986

P. vulnus

Doucet and Racca, 1986

P. zeae

Doucet and Racca, 1986; Costilla, 1994; Costilla and Coronel,

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