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Observações sôbre a resistência de algumas variedades de soja ao nematóide das galhas

Resumo

Soybean varieties cultivated at present in Brazil (Abura and Rio Grande), as well as some other promissing strains (455, Chosen, Georgian, Pereira Barreto, Arksoy, Acadian, etc.) have shown severe attacks by the rootknot nematodes. The study of the parasite showed that two forms are present, attacking the soybean roots, both being closely related to Meloidogyne incognita (Kofoid & White, 1919) Chitwood, 1949. Variety N 46-2652, considered to be resistent in the Southern part of the United States, proved to be susceptible to the mentioned nematodes, according to results of two pot test, discussed in this paper. Palmeto, La 41-1219, N 45-3799 and Otootan varieties were considered resistent to these nematodes, judged by the results of one field trial here reported. The resistence of varieties Palmeto and La 41-1219 was also confirmed by two pot experiments in which artificial infestation by nematodes was produced.


Observações sôbre a resistência de algumas variedades de soja ao nematóide das galhas

J. Gomes da SilvaI; Luís Gonzaga E. LordelloII; Shiro MiyasakaIII

IEngenheiro agrônomo, Secção de Cereais e Leguminosas, Instituto Agronômico de Campinas

IIEngenheiro agrônomo, Escola Superior de Agricultura "Luis de Queiroz", Universidade de São Paulo

IIIEngenheiro agrônomo, Secção de Genética, Instituto Agronômico de Campinas

SUMMARY

Soybean varieties cultivated at present in Brazil (Abura and Rio Grande), as well as some other promissing strains (455, Chosen, Georgian, Pereira Barreto, Arksoy, Acadian, etc.) have shown severe attacks by the rootknot nematodes. The study of the parasite showed that two forms are present, attacking the soybean roots, both being closely related to Meloidogyne incognita (Kofoid & White, 1919) Chitwood, 1949.

Variety N 46-2652, considered to be resistent in the Southern part of the United States, proved to be susceptible to the mentioned nematodes, according to results of two pot test, discussed in this paper.

Palmeto, La 41-1219, N 45-3799 and Otootan varieties were considered resistent to these nematodes, judged by the results of one field trial here reported.

The resistence of varieties Palmeto and La 41-1219 was also confirmed by two pot experiments in which artificial infestation by nematodes was produced.

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LITERATURA CITADA

  • 1.  Boock, O. J. Combate aos nematóides pela aplicação de fumigantes no solo. Efeito do D-D e Dowfume W-40 no combate aos nematóides formadores de galhas em tubérculos de batatinha. Bragantia 11: 13-18. 1951.
  • 2.  Chitwood, B. G. Root-knot nematodes Part. I. A revision of the genus Meloidogyne Goeldi, 1887. Proc. helm. Soc. Wash. 16 : 90-104. 1949.

Datas de Publicação

  • Publicação nesta coleção
    25 Maio 2010
  • Data do Fascículo
    Mar 1952
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