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Attractive response of Meloidogyne javanica varies among non-host plants, while all of them reduce the nematode population when intercropped with host plants

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Abstract

Background and aims

Intercropping non-host plants is usually a feasible practice to reduce root-knot nematodes (RKN) in agricultural soils. Here, the chemotaxis of non-host roots for Meloidogyne javanica, its development in the roots and the possibility to intercrop non-host plants with tomato or lettuce to control RKN were estimated.

Methods

Garlic (Allium sativum), Madagascar periwinkle (Catharanthus roseus) and yarrow (Achillea millefolium) were used as intercrops. Marigold (Tagetes patula) and tomato were used as positive and negative controls, respectively. Root attractiveness was evaluated for RKN by growing seedlings or using extracted exudates of each plant root on Petri dishes. The effects of lettuce or tomato intercropped with non-host plants on M. javanica were investigated by growing two plants side by side in a pot and later estimating the RKN egg formation.

Results

There was high attraction of second-stage juvenile (J2) by tomato and marigold roots, whereas J2 penetration was higher in roots of tomato than Madagascar periwinkle and marigold. The most attractive exudates were secreted from tomato and marigold followed by lettuce and Madagascar periwinkle. Most J2 in Madagascar periwinkle and marigold roots did not develop to adults. The number of eggs was reduced by intercropping tomato or lettuce with any of the tested non-hosts. The shoot growth of both crops improved when intercropped with Madagascar periwinkle, yarrow, or garlic.

Conclusion

Madagascar periwinkle, yarrow and garlic are novel model system plants to be used in the management of M. javanica, reducing RKN population and improving tomato and lettuce growth when intercropped.

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Acknowledgements

This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior – Brasil (CAPES) – Finance Code 001. The authors thank the CAPES, FAPEMIG and CNPq institutions for granting scholarships and for supporting research in our institution. They also thank the Laboratory of Nematology of the Plant Pathology Department (DFP) and the Plant Tissue Culture Laboratory of the Department of Agriculture (DAG) of the Federal University of Lavras (Universidade Federal de Lavras - UFLA) for the structure provided for the experiments and for the support of the technicians and teachers. The authors thank the Clerio Rodrigues Ribeiro, Sansão Augusto Germano, Regiane Alves Belizario and Maria Luiza Paiva de Oliveira for assisting in the laboratory activities.

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Authors and Affiliations

Authors

Contributions

V.P.C.: investigation, formal analysis, visualization, writing – original draft. W.C.T.: formal analysis, visualization, writing – original draft, writing – review & editing. J.C.P.S.: conceptualization, visualization, writing – review & editing. A.J.M.O.: formal analysis, visualization, writing – original draft. K.M.F.F.: investigation, writing – original draft. B.M.S.: investigation, writing – original draft. V.P.C.: resources, writing – review & editing. F.A.R.: visualization, writing – review & editing, supervision. F.H.V.M.: conceptualization, writing – review & editing, supervision. J.D.: conceptualization, writing – review & editing, supervision.

Corresponding authors

Correspondence to Vytória Piscitelli Cavalcanti or Joyce Dória.

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The authors have no relevant financial or non-financial interests to disclose.

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Cavalcanti, V.P., Terra, W.C., da Silva, J.C.P. et al. Attractive response of Meloidogyne javanica varies among non-host plants, while all of them reduce the nematode population when intercropped with host plants. Plant Soil (2023). https://doi.org/10.1007/s11104-023-06194-1

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  • DOI: https://doi.org/10.1007/s11104-023-06194-1

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