Resumo

GUEVARA GONZALEZ, Juan et al. Bioherbicide from phenolic extract obtained from almazara waste. Scientia Agropecuaria [online]. 2019, vol.10, n.4, pp.497-503. ISSN 2077-9917.  http://dx.doi.org/10.17268/sci.agropecu.2019.04.06.

The use of synthetic herbicides has been shown to have harmful effects on the environment and human health. An alternative to the use of these synthetic compounds is the development of pesticides derived from active principles, found in plants or secondary metabolites from microorganisms, which have phytotoxic properties, but of little or no toxicity in mammals and that can be used in organic agriculture. In this context, the present work analyzed the bioherbicidal capacity of a phenolic extract obtained from olive mill wastewater, which is a liquid residue produced in the olive oil production. The phytotoxic effect was evaluated through germination tests of wheat seeds (Triticum aestivum). The effectiveness of the phenolic extract was compared with a commercial herbicide whose active principle is Simazine. The results show that at concentrations of 100 ppm (gallic acid equivalents) approximately 10% of the seeds germinate. Tests at concentrations of 480 and 1050 ppm inhibit all stages of germination. Unlike the tests with the phenolic extract, the commercial herbicide does not stop the radicular emergence in the seeds. However, they appear with deformations and fail to develop normally

Palavras-chave : phenol; bioherbicide; alpechin; germination; phytotoxicity.

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