Chemical control associated with genetic management of Meloidogyne javanica in soybean

Maira Laíza C. Fontanela1*, Angélica Miamoto2, Durvalino Augusto Rodrigues-Neto3, Angélica Calandrelli2, Monique Thiara R. e Silva2, and Cláudia Regina Dias-Arieira1
Integrated management is considered the best strategy to mitigate the damage caused by plant-parasitic nematodes. However, there is still limited information regarding some integrated techniques. Thus, this study aimed to assess the effects of genetic management associated with chemical control of Meloidogyne javanica in soybean (Glycine max (L.) Merr.) The experiment was installed in a greenhouse according to an 8×4 factorial design with eight replicates. The first factor was soybean cultivar (HO Juruena IPRO, resistant; Foco IPRO, HO Maracaí IPRO, and CZ 58B28 IPRO, moderately resistant; HO Mamoré IPRO, moderately susceptible; and Extrema IPRO, CZ 48B32 IPRO, and HO Aporé IPRO, susceptible). The second factor consisted of an untreated control and commercial nematicides based on abamectin, thiodicarb+imidacloprid, and fluopyram. Plants were inoculated with 2000 nematode eggs, and nematode and vegetative variables were evaluated at 65 d after inoculation. There was an interaction effect on nematode variables. Furthermore, there was an additive effect of genetic management and chemical control, mainly in resistant cultivars treated with thiodicarb+imidacloprid or fluopyram with controls of up to 69.90% and 96.86%, respectively. The application of fluopyram and the use of 'HO Juruena IPRO', 'Foco IPRO' or 'HO Maracaí IPRO' also contributed to the control of M. javanica. Vegetative variables were studied by analyzing product effects separately, but results were inconclusive.
Keywords: Cultivars, Glycine max, integrated management, nematicides, root-knot nematodes.
1Universidade Estadual de Maringá, Departamento de Ciências Agrárias, Umuarama, Paraná, 87020-900, Brasil.
2Universidade Estadual de Maringá, Pós-Graduação em Agronomia, Maringá, Paraná, 87020-900, Brasil.
3GDM Genética do Brasil, Cambé, Paraná, 86183-751, Brasil.
*Corresponding author (mairafontanela@yahoo.com.br).