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Revista Brasileira de Fruticultura

Print version ISSN 0100-2945

Abstract

SANTOS, Bruna Hanielle Carneiro dos et al. Control of meloidogyne javanica on 'prata- anã' banana seedlings by organic compounds. Rev. Bras. Frutic. [online]. 2013, vol.35, n.2, pp.650-656. ISSN 0100-2945.  https://doi.org/10.1590/S0100-29452013000200038.

The study aimed to evaluate the effect of organic compounds in the control of Meloidogyne javanica, and in the development of 'Prata-Anã' banana seedlings. The experiment was carried out in a completely randomized design with ten replicates, and treatments consisted of four compounds made from different raw materials (remnants of bananas crop, sugar cane, cattle manure, banana skins, weeds, Andropogon grass), the manure, the castor bean cake, and controls (mineral fertilizer; 'carbofuran' and absolute control (no added organic compounds). It was placed in each pot 3 kg of soil, autoclaved, mixed with each one of the treatments and inoculated with a suspension containing 4,000 eggs of M. javanica. After four days one 'Prata-Anã' micropropagated seedling was transplanted and at 60 days it was evaluated: plant height, diameter, number of leaves, dry matter weight of shoots, number of galls, egg masses, number of eggs and the number of second-stage juveniles (J2) per 100 cm3 of soil. It was tested in vitro the effect of humic fractions of the four compounds (which did not cause phytotoxicity) and cattle manure on mortality and motility of J2 of M. javanica. The essay was set on ELISA plates in a completely randomized design with five replications. Organic compounds and manure increased the growth of plantlets. The castor bean cake caused phytotoxic effect on the seedlings. Less number of nematological variables was provided by the castor bean cake and by the 'carbofuran'. The number of J2 was also lower in plots treated with 'carbofuran' and also by the Compound 3 constituted of weed + sugar cane residues + cattle manure and by the mineral fertilizer. For the in vitro test, the humic substances presented nematicide and nematostatic effects. Among the compounds, the C3 showed itself promise for reducing the development of the nematode and for not present phytotoxic effect.

Keywords : root-knot nematodes; organic manure; Musa spp.

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