Propolis for the control of powdery mildew and the induction of phytoalexins in cucumber

Due to its antimicrobial properties propolis has been utilised by man for millennia, however, only recently has its use as an agricultural antimicrobial agent been tested. The capacity of this product to activate plant defence mechanisms is highly promising, due to the large number of substances in...

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Autores principales:	Guginski-Piva,Claudia Aparecida, dos Santos,Idalmir, Wagner Júnior,Américo, Winter Heck,Daniel, Faber Flores,Mariana, Pazolini,Kelly
Lenguaje:	English
Publicado:	Universidad de Tarapacá. Facultad de Ciencias Agronómicas 2015
Materias:	Podosphaera fuliginea alternative control ethanol extract of propolis cucumber
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-34292015000100005
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spelling	oai:scielo:S0718-342920150001000052015-02-13Propolis for the control of powdery mildew and the induction of phytoalexins in cucumberGuginski-Piva,Claudia Aparecidados Santos,IdalmirWagner Júnior,AméricoWinter Heck,DanielFaber Flores,MarianaPazolini,Kelly Podosphaera fuliginea alternative control ethanol extract of propolis cucumber Due to its antimicrobial properties propolis has been utilised by man for millennia, however, only recently has its use as an agricultural antimicrobial agent been tested. The capacity of this product to activate plant defence mechanisms is highly promising, due to the large number of substances in its composition. Therefore, the objective of this study was to evaluate the effect of different concentrations and application times of ethanol extracts of propolis (EEP) on powdery mildew (Podosphaera fuliginea) in cucumber crops, to establish the most suitable method for control and whether or not there is potential to induce plant defence mechanisms. The experiment was conducted in pots in a greenhouse. A completely randomised experimental design was employed, using a 6x3 factorial consisting of six concentrations (0; 0.5; 1; 2; 4 and 8%) and three EEP application times (24 hours before pathogen inoculation, 24 hours after pathogen inoculation and at the onset of first symptoms of the disease), replicated four times. Evaluations for disease incidence and severity were made weekly. The experiment was repeated for a second crop, following the same methodology established in the first. We also evaluated the effect of different EEP concentrations on the activation of plant defence mechanisms, through the induction of phytoalexins in soybean (Glycine max) cotyledons. A significant interaction was observed between the factors (application time x concentration) for disease incidence. For the area under the disease progress curve (AUDPC) for severity there was no interaction observed between the factors, however, we observed significant differences for the two factors separately. The AUDPC for incidence was less for the application 24 hours after pathogen inoculation, principally at the highest concentration. The 8% concentration of EEP controlled disease severity by 31.33 and 43.68% for the first and second crops, respectively. The application of the concentrations 24 hours before and 24 hours after pathogen inoculation showed less AUDPC for severity, but this difference was not significant for either crop. The EEP induced increasing phytoalexin levels in soybean cotyledons as the applied EEP concentration increased. Ethanol extracts of propolis could have potential for the control of powdery mildew, principally in cucumbers, through the preventive application of an 8% concentration.info:eu-repo/semantics/openAccessUniversidad de Tarapacá. Facultad de Ciencias AgronómicasIdesia (Arica) v.33 n.1 20152015-02-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-34292015000100005en10.4067/S0718-34292015000100005
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Podosphaera fuliginea alternative control ethanol extract of propolis cucumber
spellingShingle	Podosphaera fuliginea alternative control ethanol extract of propolis cucumber Guginski-Piva,Claudia Aparecida dos Santos,Idalmir Wagner Júnior,Américo Winter Heck,Daniel Faber Flores,Mariana Pazolini,Kelly Propolis for the control of powdery mildew and the induction of phytoalexins in cucumber
description	Due to its antimicrobial properties propolis has been utilised by man for millennia, however, only recently has its use as an agricultural antimicrobial agent been tested. The capacity of this product to activate plant defence mechanisms is highly promising, due to the large number of substances in its composition. Therefore, the objective of this study was to evaluate the effect of different concentrations and application times of ethanol extracts of propolis (EEP) on powdery mildew (Podosphaera fuliginea) in cucumber crops, to establish the most suitable method for control and whether or not there is potential to induce plant defence mechanisms. The experiment was conducted in pots in a greenhouse. A completely randomised experimental design was employed, using a 6x3 factorial consisting of six concentrations (0; 0.5; 1; 2; 4 and 8%) and three EEP application times (24 hours before pathogen inoculation, 24 hours after pathogen inoculation and at the onset of first symptoms of the disease), replicated four times. Evaluations for disease incidence and severity were made weekly. The experiment was repeated for a second crop, following the same methodology established in the first. We also evaluated the effect of different EEP concentrations on the activation of plant defence mechanisms, through the induction of phytoalexins in soybean (Glycine max) cotyledons. A significant interaction was observed between the factors (application time x concentration) for disease incidence. For the area under the disease progress curve (AUDPC) for severity there was no interaction observed between the factors, however, we observed significant differences for the two factors separately. The AUDPC for incidence was less for the application 24 hours after pathogen inoculation, principally at the highest concentration. The 8% concentration of EEP controlled disease severity by 31.33 and 43.68% for the first and second crops, respectively. The application of the concentrations 24 hours before and 24 hours after pathogen inoculation showed less AUDPC for severity, but this difference was not significant for either crop. The EEP induced increasing phytoalexin levels in soybean cotyledons as the applied EEP concentration increased. Ethanol extracts of propolis could have potential for the control of powdery mildew, principally in cucumbers, through the preventive application of an 8% concentration.
author	Guginski-Piva,Claudia Aparecida dos Santos,Idalmir Wagner Júnior,Américo Winter Heck,Daniel Faber Flores,Mariana Pazolini,Kelly
author_facet	Guginski-Piva,Claudia Aparecida dos Santos,Idalmir Wagner Júnior,Américo Winter Heck,Daniel Faber Flores,Mariana Pazolini,Kelly
author_sort	Guginski-Piva,Claudia Aparecida
title	Propolis for the control of powdery mildew and the induction of phytoalexins in cucumber
title_short	Propolis for the control of powdery mildew and the induction of phytoalexins in cucumber
title_full	Propolis for the control of powdery mildew and the induction of phytoalexins in cucumber
title_fullStr	Propolis for the control of powdery mildew and the induction of phytoalexins in cucumber
title_full_unstemmed	Propolis for the control of powdery mildew and the induction of phytoalexins in cucumber
title_sort	propolis for the control of powdery mildew and the induction of phytoalexins in cucumber
publisher	Universidad de Tarapacá. Facultad de Ciencias Agronómicas
publishDate	2015
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-34292015000100005
work_keys_str_mv	AT guginskipivaclaudiaaparecida propolisforthecontrolofpowderymildewandtheinductionofphytoalexinsincucumber AT dossantosidalmir propolisforthecontrolofpowderymildewandtheinductionofphytoalexinsincucumber AT wagnerjunioramerico propolisforthecontrolofpowderymildewandtheinductionofphytoalexinsincucumber AT winterheckdaniel propolisforthecontrolofpowderymildewandtheinductionofphytoalexinsincucumber AT faberfloresmariana propolisforthecontrolofpowderymildewandtheinductionofphytoalexinsincucumber AT pazolinikelly propolisforthecontrolofpowderymildewandtheinductionofphytoalexinsincucumber
_version_	1714203705015795712

Propolis for the control of powdery mildew and the induction of phytoalexins in cucumber

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