Antifungal activity of extracts from species against .

causes destructive ear rot diseases in maize and wheat. New antifungals are essential to combat this pathogen, and aerial parts of species (Acanthaceae) are a potential source. We investigated the antifungal activity of extracts from stems and leaves of five species native to Northwest Argentina.

Excito-repellent and Pesticide-Likeness Properties of Essential Oils on (Fabricius) (Nitidulidae) and (L.) (Silvanidae).

(Fabricius) (Nitidulidae) and (L.) (Silvanidae) are insect pests that cause severe damage in important walnut growing regions in the northwest of Argentina. The current management approaches for these pests involve the use of unsafe phosphorus pesticides whose overuse have led to farmworker poisoning, pest resistance issues, and environmental contamination.

Chemical composition and insecticidal activity of essential oils from cultivated and native aromatic plants of Argentina against (Fabricius) (Nitidulidae) and (L.) (Silvanidae).

Essential oils from aerial parts of six aromatic plants were analysed by GC-MS. The major compounds identified were -terpinene (11.5%), cuminaldehyde (26.

Advances in chemical and biological characterization of triterpenoid saponins from L. using UHPLC-MS/MS and cell-based assays.

A fraction enriched in triterpenoid saponins (F4) from L. was chemically characterized by UHPLC-ESI-QTOF-MS/MS and NMR analyses. The results proposed the presence of nine monodesmosidic saponins derived from oleanolic acid, including two reported for the first time for this species, : 3-O-{β-D-glucopyranosyl (1→4)-[β-D-xylopyranosyl (1→2)]-β-D-glucopyranosyl (1→4)-[β-D-glucopyranosyl (1→2)]-α-L-arabinopyranosyl}-13β, 28-epoxy- 22 acetyl- 28 methoxy-16α, 24-oleananediol and : 3-O-{β-D-glucopyranosyl (1→4)-β-D-glucopyranosyl (1→4)-[β-D-xylopyranosyl (1→2)]-β-D-glucopyranosyl (1→4)-[β-D-glucopyranosyl (1→2)]-α-L-arabinopyranosyl}-13β, 28-epoxy- 16α, 30-oleananediol.

Fusaric acid detoxification: a strategy of Gliocladium roseum involved in its antagonism against Fusarium verticillioides.

Fungal co-culture has several biotechnological applications including the discovery or the enhanced production of secondary metabolites. It is also a powerful tool aiding to elucidate the involvement of secondary metabolism in fungus-fungus interactions. The aim of this work was to investigate secondary metabolites produced when Fusarium verticillioides is co-cultured with Gliocladium roseum.

Antifungal activity and toxicity studies of flavanones isolated from aerial parts.

[Asteraceae] is traditionally employed in Northwestern Argentina for fungal infections treatment. We report the antifungal activity guided isolation and identification of substances from aerial parts of this species, both individually and in combination with fluconazole (FLU), against strains. Two antifungal flavanones were identified as naringenin (NAR) and pinocembrin (PIN).

Chemical composition and larvicidal activity of essential oils from , and against (Diptera: Culicidae).

Essential oils from aerial parts of the herbs and , and leaves of the tree were analyzed by GC-FID and GC-MS, and their larvicidal activities were assayed on the early fourth instar larvae of . The major constituents of the oils were limonene (14.5%) and thymol (11.

Efficacy of Argentinean propolis extracts on control of potato soft rot caused by Erwinia carotovora subsp.

Background: Erwinia carotovora subsp. cause the potato soft rot, which is a major disease in agriculture. Antibacterial agents currently applied on potato soft rot often offer a restricted control and have several disadvantages.

Influence of water activity and temperature on growth and production of trichothecenes by Fusarium graminearum sensu stricto and related species in maize grains.

Fusarium meridionale and F. boothii cause Gibberella Ear Rot (GER) in maize. This study determined the effects of temperature (5-35 °C) and water activity (0.

Antifungal and antimycotoxigenic metabolites from native plants of northwest Argentina: isolation, identification and potential for control of Aspergillus species.

Extracts from aerial parts of , , and were assayed against toxigenic species. They were obtained by sequential extraction of the aerial parts with hexane (fHex), dichloromethane (fDCM), ethyl acetate (fEtOAc) and methanol (fMeOH). The fMeOH from showed the highest antifungal spectrum (MIC = 750-1500 µg mL; MID = 50-200 µg; DI = 1.

Antifungal activity of Bignoniaceae plants on and .

Twenty four extracts from Bignoniaceae plants of northwest Argentina were tested for antifungal activity against species responsible of the grape black rot. Stems and leaves of and were separately extracted with solvents of increasing polarity to obtain the dichloromethane (fCHCl), ethyl acetate (fEtOAc) and methanol extracts (fMeOH). The fCHCl from stem of had the lowest IC (1.

Chemical composition and antifungal activity of essential oils from , , and against toxigenic and species.

Essential oils from aerial parts of and were analysed by GC-MS and their antifungal activities were assayed on toxigenic and species. Sabinene (27.6 ± 0.

Antibacterial activity of native plants from Northwest Argentina against phytopathogenic bacteria.

Extracts from aerial parts of medicinal plants from northwest Argentina were screened for antibacterial activity against the phytopathogenic strains namely CECT 124 (), CECT 126 ( pv. ), CECT 225 ( var. ), CECT 472 () and CECT 792 ( pv.

Estimates of Horizontal Groundwater Flow Velocities in Boreholes.

Currently, monitoring tools can be deployed in observation boreholes to better assess groundwater flow, flux of dissolved contaminants and their mass discharge in an aquifer. The relationship between horizontal water velocity in observation boreholes and Darcy fluxes in the surrounding aquifer has been studied for natural flow conditions (i.e.

Antifungal activity and cytotoxicity of extracts and triterpenoid saponins obtained from the aerial parts of Anagallis arvensis L.

Ethnopharmacological Relevance: Anagallis arvensis L. (Primulaceae) is used in argentinean northwestern traditional medicine to treat fungal infections. We are reporting the isolation and identification of compounds with antifungal activity against human pathogenic yeast Candida albicans, and toxicity evaluation.

Chemical composition and antifungal activity of essential oils from medicinal plants of Kazakhstan.

The composition of essential oils from leaves of Kazakhstan medicinal plants was analysed by GC-MS. The major compounds identified were 1,8-cineole (34.2%), myrcene (19.

Antifungal metabolites from Schinopsis balansae Engl (Anacardiaceae): isolation, identification and evidences of their mode of action on Fusarium graminearum Schwabe.

An antifungal activity-directed fractionation of leaf constituents from Schinopsis balansae on Fusarium graminearum yielded a fraction mainly made of a mixture of four 3-n-heptadec(en)ylcatechols (PALK). The PALK fraction showed on macroconidia germination a MIC value of 500 μg/mL which was twofold higher than that required for prothioconazole (MIC = 250 μg/mL). Sublethal concentrations of PALK modify the morphogenesis in germinating macroconidia, and decreased fungal production of HO and deoxynivalenol biosynthesis at early fungal growth.

Chemical composition and antimicrobial activity of essential oils from Acantholippia deserticola, Artemisia proceriformis, Achillea micrantha and Libanotis buchtormensis against phytopathogenic bacteria and fungi.

Essential oils from aerial parts of Acantholippia deserticola, Artemisia proceriformis, Achillea micrantha and Libanotis buchtormensis were analysed by GC-MS. The major compounds identified were β-thujone (66.5 ± 0.

Antifungal activity of 4-hydroxy-3-(3-methyl-2-butenyl)acetophenone against Candida albicans: evidence for the antifungal mode of action.

The main secondary metabolite of Senecio nutans is 4-hydroxy-3-(3-methyl-2-butenyl)acetophenone (4HMBA). The antifungal activity of this compound and three derivatives was assessed using Candida albicans. 4HMBA exhibited the highest antifungal activity among the assayed compounds.

Isolation, identification and usefulness of antifungal compounds from Zuccagnia punctata for control of toxigenic ear rot pathogens.

Infusion, tincture and decoction of leaves of Zuccagnia punctata Cav. were assayed on growth of Fusarium verticillioides, F. graminearum sensu stricto, F.

Essential oils from Schinus species of northwest Argentina: Composition and antifungal activity.

The composition of the essential oils from leaves (Sal) and fruits of S. areira (Saf), and fruits of S. fasciculatus (Sff) and S.

Antibacterial activities of Ligaria cuneifolia and Jodina rhombifolia leaf extracts against phytopathogenic and clinical bacteria.

Six plant extracts prepared from Ligaria cuneifolia and Jodina rhombifolia were screened for their potential antimicrobial activities against phytopathogens and clinically standard reference bacterial strains. Bioautography and broth microdilution methods were used to study samples antibacterial activities against 7 bacterial strains. The minimum inhibitory concentrations (MICs) and minimum bactericidal concentrations (MBCs) of samples were attained.