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Research Article

Academia Journal of Agricultural Research 8(4): 112-119, April 2020
DOI: 10.15413/ajar.2020.0103
ISSN: 2315-7739
2020 Academia Publishing



Bioherbicide action of aqueous extracts of Sorghum sp., Dolichos sp. and Pachyrhizus sp. in pre and post-emergence

Accepted 31st January 2020

Barbosaja A1,2, Canavessi H1, Gibbert AM1, Costa NV1 and Stangarlin JR1

State University of Western Paran (UNIOESTE), Pernambuco Street, n. 1777, CEP 85960-000, Marechal CndidoRondon, Paran State, Brazil.
Western Paran Matology Study Group (GEMOP), Center of Agrarian Sciences, State University of Western Paran (UNIOESTE), Marechal CndidoRondon, Brazil.


Plant extracts may contain substances with possible bioherbicidal effect. Determining the ideal method for preparing the extracts can optimize the results. This study aimed to evaluate the bioherbicide effect in weeds such as Bidens pilosa, Euphor biaheterophylla and Digitaria insularis, and extracts of Dolichos lab lab, Pachyrhizus sp. and Sorghum bicolor isolated and in a mixture, and submitted to different modes of preparation. In pre-emergence, it was evaluated the influence of aqueous extracts on germination and initial development of B. pilosa, E. heterophylla and D. insularis, in a completely randomized design, factorial 7x4+T, with four replicates. In post-emergence, the test was carried out in a completely randomized design with six treatments and six replicates. The bioherbicide effect varied in accordance with the preparation of the extract and the species evaluated. There was a reduction in the germination percentage with 80% for B. pilosa and 60% for D. insularis, besides the effects on the length of the hypocotyl with 44% for E. heterophylla and the length of the primary root. In post-emergence, B. pilosa showed increased accumulation of total dry mass, with phytotoxicity of up to 14 days after the application of the extracts. D. lab lab., D. insularis and E. heterophylla showed reduction in the accumulation of dry mass (30%). It can be concluded that the bioherbicide effect of extracts of D. lab lab, Pachyrhizus sp. and S. bicolor depends on the preparation of the extracts, the target species, and the period of application; however, the extracts can be explored on techniques for the production of compounds bioherbicide.

Key words: Weed competition, allelopathy, green manures, weed.

This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Cite this article as:

Barbosaja A, Canavessi H, Gibbert AM, Costa NV, Stangarlin JR (2020). Bioherbicide action of aqueous extracts of Sorghum sp., Dolichos sp. and Pachyrhizus sp. in pre and post-emergence. Acad. J. Agric. Res. 8(4): 112-119.

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