Crotalaria and millet as alternative controls of root-knot nematodes infecting okra

Authors

  • Daniel Dalvan do Nascimento Universidade Estadual Paulista
  • Roberta Luiza Vidal Universidade Estadual Paulista
  • Anderson Alves Pimenta Centro Universitário Fundação Educacional de Barretos
  • Marilia Gregolin Costa Centro Universitário Fundação Educacional de Barretos
  • Pedro Luiz Martins Soares Universidade Estadual Paulista

DOI:

https://doi.org/10.14393/BJ-v36n3a2020-42248

Keywords:

Crotalaria spectabilis, Intercropping, Cover crop, Green manure, Meloidogyne, Pennisetum glaucum

Abstract

The relationship of crops grown in rotation or in succession has increased every day and the use of antagonistic plants and/or non-host plants is one of the most efficient practices of integrated management of nematodes. This study aimed to evaluate the efficiency of crotalaria (Crotalaria spectabilis Roth) and millet [Pennisetum glaucum (L.) Leeke] ‘ADR 300’ in reducing the population of Meloidogyne incognita and M. javanica and in increasing the productivity of okra [Abelmoschus esculentus (L.) Moench] when cultivated in succession. The experiment was conducted in an area cultivating okra (host culture) in rotation, with a history of severe infestation by phytonematoids. The experimental design involved randomized blocks with six treatments and four replicates, with the following treatments: T1, 15 kg.ha-1 of millet seeds; T2, 30 kg.ha-1 of crotalaria; T3, 10 kg.ha-1 of millet + 20 kg.ha-1 of crotalaria; T4, 20 kg.ha-1 of millet + 6 kg.ha-1  of crotalaria; T5, 6 kg.ha-1 of millet + 36 kg.ha-1 of crotalaria; and T6, control. The nematode populations in the soil and roots were evaluated about 60 d after planting okra, and the yield was evaluated at the end of the crop cycle. Simple treatment with millet or crotalaria reduced the nematode population by 61% and 72%, respectively. The millet-crotalaria intercropping treatments reduced the nematode population by up to 85% compared with the control. In terms of productivity, there was an increase of 787 kg.ha-1 in the millet treatment and 2,109 kg.ha-1 in the intercropping treatments. Both the single cultivation of crotalaria or millet and the consortia of crotalaria and millet were effective in controlling the root-knot nematodes, and increased the productivity of okra.

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Published

2020-04-13

How to Cite

NASCIMENTO, D.D. do, VIDAL, R.L., PIMENTA, A.A., COSTA, M.G. and SOARES, P.L.M., 2020. Crotalaria and millet as alternative controls of root-knot nematodes infecting okra. Bioscience Journal [online], vol. 36, no. 3, pp. 713–719. [Accessed4 December 2022]. DOI 10.14393/BJ-v36n3a2020-42248. Available from: https://seer.ufu.br/index.php/biosciencejournal/article/view/42248.

Issue

Section

Agricultural Sciences