RT info:eu-repo/semantics/article
T1 Evaluation of Magonia pubescens A. St.-Hill. Roots Extract against Phytopathogens: Searching for Eco-Friendly Crop Protection Products
A1 Jiménez Díaz, Ignacio Antonio
A1 Moraes, Acácio R. A.
A1 Sabina, Samuel R.
A1 Expósito, Daniela G.
A1 Giménez, Cristina
A1 Espinel, Guacimara
A1 Sousa, Grasiely F.
A1 Duarte, Lucienir P.
A1 Cabrera, Raimundo
A1 Bazzocchi, Isabel L.
K1 Magonia pubescens
K1 biopesticides
K1 phytopathogenic fungi
K1 Chrysodeixis chalcites
AB Botanical biopesticides have emerged as sustainable and eco-friendly alternatives to syntheticpesticides, whose indiscriminate use leads to several drawbacks to human and environmentalhealth. To the best of our knowledge, there have been no reports on M. pubescens’ bioactivity onphytopathogens affecting crops as a potential fungicide or antifeedant. This has encouraged us toinvestigate the potential of the roots of this plant as a source of biopesticides. The present studyreports on the evaluation of the roots extract from Magonia pubescens A. St.-Hill., a species from theCerrado (Brazilian savannah), on the phytopathogenic fungi Botrytis cinerea, Fusarium oxysporum,and Alternaria alternata. In addition, its insect antifeedant effect was assayed against Chrysodeixischalcites. Thus, an in vitro test-assay was used to determine the fungicide potential (percentagegrowth inhibition, % GI) of the ethanolic extract of this plant species, whereas a leaf-disk bioassay onthe 5th instar larvae of C. chalcites was performed to evaluate its insecticidal potential. The ethanolicextract was further fractionated by liquid–liquid partition using solvents of increasing polarity. Thehexane/dichloromethane fraction exhibited a moderated potency and was similar to the ethanolicextract on the three assayed fungi (around % GI 30 at 1 mg/mL), whereas the n-butanol fractionshowed a slight improvement of the fungicide effect against B. cinerea (% GI 39.18 at 1 mg/mL). Moreover,the ethanolic extract exhibited a strong antifeedant activity, with a refusal rate (FR) higher than90% in both choice and non-choice assays against C. chalcites, while the ethyl acetate and n-butanolfractions behaved as appetite suppressors. These results highlight M. pubescens as a promising sourceof biopesticides and deserve further investigations to optimize extraction procedures.
YR 2023
FD 2023
LK http://riull.ull.es/xmlui/handle/915/35872
UL http://riull.ull.es/xmlui/handle/915/35872
LA en
DS Repositorio institucional de la Universidad de La Laguna
RD 06-jun-2024