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Acta Scientiarum. Agronomy

On-line version ISSN 1807-8621

Abstract

NUNES, Henrique Teixeira; MONTEIRO, Antonio Carlos  and  POMELA, Alan William Vilela. Use of microbial and chemical agents to control Meloidogyne incognita in soybean. Acta Sci., Agron. (Online) [online]. 2010, vol.32, n.3, pp.403-409. ISSN 1807-8621.  https://doi.org/10.4025/actasciagron.v32i3.2166.

Root-knot nematodes are considered significant pathogens of soybean crops. The objective of this work was to evaluate the efficacy of two fungi (Paecilomyces lilacinus (Thom.) Samsom and Pochonia chlamydosporia (Goddard) Zare & Gams (syn. Verticillium chlamydosporium), a commercial product based on Bacillus sp. and Aldicarb on the control of Meloidogyne incognita on soybean, cultivar M-SOY 6101. The experimental design was set as randomized blocks with four replications. Nine treatments were evaluated: three biological agents used for seed treatment with and without post-emergence application, Aldicarb on post-emergence only, and two controls. All treatments were inoculated with the nematode, except for a blank control where only water was applied. One control-only treated with the nematode was also included. Aldicarb could reduce the number of eggs and juveniles in the roots. P. lilacinus showed the best performance among the biological control agents, reducing the number of eggs and increasing dry root weight. Nemix, a Bacillus sp. based commercial product and P. chlamydosporia could only reduce significantly the number of eggs of the nematode. In this work, it was possible to conclude that the chemical and biological agents showed a moderate activity in the control of M. incognita in soybean.

Keywords : Glycine max; Paecilomyces lilacinus; Pochonia chlamydosporia; Bacillus; Aldicarb; Root-knot nematodes.

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