In vitro fungitoxic potential of Lippia gracilis (Schauer) essential oil against phytopathogens
| Autor: | F. M. de F. Alves, A. L. dos S. Xavier, Thyago Lima, I. G. de Araújo, L. P. da Nóbrega, Yaroslávia Ferreira Paiva, Tiago Augusto Lima Cardoso, K. R. da S. França, A. P. M. dos S. Rodrigues, A. F. de Mendonça Júnior, P. T. M. de Azevedo, H. da S. Barboza |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | April 2020. :667-674 |
| ISSN: | 1835-2707 1835-2693 |
| DOI: | 10.21475/ajcs.20.14.04.p2310 |
| Popis: | This study evaluates the in vitro effects of Lippia gracilis essential oil on the mycelial growth of phytopathogenic fungi. Experiments were carried out using a completely randomized design to assess the effects of eight treatments. Five replicates were evaluated for each experimental group. The essential oil was incorporated into the potato dextrose culture medium and poured into Petri dishes. Treatments were comprised of different concentrations of the oil (0.0125, 0.025, 0.05, 0.1, and 0.2%), a negative control (0.0%), and two positive controls (commercial fungicides). The plates were inoculated with fungi including Colletotrichum gloeosporioides, C. musae, C. fructicola, C. asianum, Alternaria alternata, A. brassicicola, Fusarium solani, F. oxysporum f. sp. cubense, and Lasiodiplodia theobromae and were incubated for seven days at 27 ± 2°C. The following variables were measured to verify the differences observed among treatments: percentage of mycelial growth inhibition and index of mycelial growth speed. All concentrations of L. gracilis oil inhibited the mycelial growth of the fungal species evaluated. The complete inhibition was observed between concentrations of 0.0125 and 0.1%. Treatment with oil inhibited fungal growth with similar, or even greater, efficiency than commercial fungicides.. We recommend the development of in vivo tests to verify whether L. gracilis essential oil can protect against fungal disease in live plants. |
| Databáze: | OpenAIRE |
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