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