ALTERNATIVE PRODUCTS FOR THE CONTROL OF Meloidogyne incognita IN OKRA.
RL Estevez; MA Muller; TM Mioranza; F. Peters-Fiorentin; JR Stangarlin; OJ Kuhn; EM. Muller; MF. de Almeida; MH. Dias; JA. Barbosa; MIF Cruz; APS. Chambo.
ABSTRACT: Plant nematodes as Meloidogyne incognita have harmful effect on the
root system, affect absorption and translocation of nutrients, and modifying the plant
physiology. The search for alternative products comes as an excellent option for
agriculture. The objective of this work was to evaluate different methods of alternative
control of Meloidogyne incognita on okra culture, cultivated on organic growth. The
experimental design used was randomized blocks, composed of five treatments with
four replicates. The treatments were: control (water); residues of mucuna (or velvet
bean); commercial product based on Bacillus subtilis, Bacillus licheniformis and
Trichoderma longibrachiatum; homeopathic product Cina 200CH, besides solution
containing cultures of Paecilomyces lilacinus and Pochonia chlamydosporia (10 mL to
2 L of water). The variables analyzed were number of galls, J2 in 100 cm3 of soil, J2 in
10 g of root and reproductive factor (RF). The results showed that there was no
significant difference by Tukey test at 5% among treatments for number of galls. The
average of the J2 extracted from the root of the plants treated with Mucuna, Cina
200CH, B. licheniformis B. subtilis and T. longibrachiatum present no significant
differences, differing only of P. lilacinus, P. chlamydosporia and of the control.
Relative to the J2 variable in soil, the treatment based in B. licheniformis, B. subtilis and
T. longibrachiatum was superior only to control, did not differing from other treatments.
The alternative treatments produced a (RF) decrease, contributing to reducing the
amount of J2 in soil.
Key words: Abelmoschus esculentus L., root-knot nematodes, homeopathic product,
alternative control.