Cargando…

Effects of Agronomic Practices on the Severity of Sweet Basil Downy Mildew (Peronospora belbahrii)

Downy mildew (caused by Peronospora belbahrii) is a severe disease of sweet basil (Ocimum basilicum) crops around the world. We examined cultural methods for reducing the severity of sweet basil downy mildew (SBDM) under commercial conditions in greenhouses and walk-in tunnels. The effects of the or...

Descripción completa

Detalles Bibliográficos
Autores principales: Omer, Chen, Nisan, Ziv, Rav-David, Dalia, Elad, Yigal
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8147145/
https://www.ncbi.nlm.nih.gov/pubmed/33946467
http://dx.doi.org/10.3390/plants10050907
_version_ 1783697561788350464
author Omer, Chen
Nisan, Ziv
Rav-David, Dalia
Elad, Yigal
author_facet Omer, Chen
Nisan, Ziv
Rav-David, Dalia
Elad, Yigal
author_sort Omer, Chen
collection PubMed
description Downy mildew (caused by Peronospora belbahrii) is a severe disease of sweet basil (Ocimum basilicum) crops around the world. We examined cultural methods for reducing the severity of sweet basil downy mildew (SBDM) under commercial conditions in greenhouses and walk-in tunnels. The effects of the orientation of walk-in tunnels, air circulation in greenhouses, plant density, and soil mulch were tested. SBDM was less severe in the tunnels that were oriented north-south than in those oriented east-west, but the yields in both types of tunnels were similar. Increased air circulation reduced SBDM severity, but did not affect yield. Gray or transparent polyethylene mulch reduced SBDM severity and, in most cases, increased yield relative to bare soil/growth medium. Yellow polyethylene mulch provided a smaller amount of control. The combination of increased air circulation and yellow polyethylene mulch provided synergistic SBDM control, whereas no synergism was observed when we combined increased air circulation with the other two types of mulch. Planting at half the usual density reduced disease severity. The reduced plant density was associated with reduced yield in the greenhouses, but not in the tunnels. All of the tested methods provided an intermediate level of SBDM control that varied among the different experiments.
format Online
Article
Text
id pubmed-8147145
institution National Center for Biotechnology Information
language English
publishDate 2021
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-81471452021-05-26 Effects of Agronomic Practices on the Severity of Sweet Basil Downy Mildew (Peronospora belbahrii) Omer, Chen Nisan, Ziv Rav-David, Dalia Elad, Yigal Plants (Basel) Article Downy mildew (caused by Peronospora belbahrii) is a severe disease of sweet basil (Ocimum basilicum) crops around the world. We examined cultural methods for reducing the severity of sweet basil downy mildew (SBDM) under commercial conditions in greenhouses and walk-in tunnels. The effects of the orientation of walk-in tunnels, air circulation in greenhouses, plant density, and soil mulch were tested. SBDM was less severe in the tunnels that were oriented north-south than in those oriented east-west, but the yields in both types of tunnels were similar. Increased air circulation reduced SBDM severity, but did not affect yield. Gray or transparent polyethylene mulch reduced SBDM severity and, in most cases, increased yield relative to bare soil/growth medium. Yellow polyethylene mulch provided a smaller amount of control. The combination of increased air circulation and yellow polyethylene mulch provided synergistic SBDM control, whereas no synergism was observed when we combined increased air circulation with the other two types of mulch. Planting at half the usual density reduced disease severity. The reduced plant density was associated with reduced yield in the greenhouses, but not in the tunnels. All of the tested methods provided an intermediate level of SBDM control that varied among the different experiments. MDPI 2021-04-30 /pmc/articles/PMC8147145/ /pubmed/33946467 http://dx.doi.org/10.3390/plants10050907 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Omer, Chen
Nisan, Ziv
Rav-David, Dalia
Elad, Yigal
Effects of Agronomic Practices on the Severity of Sweet Basil Downy Mildew (Peronospora belbahrii)
title Effects of Agronomic Practices on the Severity of Sweet Basil Downy Mildew (Peronospora belbahrii)
title_full Effects of Agronomic Practices on the Severity of Sweet Basil Downy Mildew (Peronospora belbahrii)
title_fullStr Effects of Agronomic Practices on the Severity of Sweet Basil Downy Mildew (Peronospora belbahrii)
title_full_unstemmed Effects of Agronomic Practices on the Severity of Sweet Basil Downy Mildew (Peronospora belbahrii)
title_short Effects of Agronomic Practices on the Severity of Sweet Basil Downy Mildew (Peronospora belbahrii)
title_sort effects of agronomic practices on the severity of sweet basil downy mildew (peronospora belbahrii)
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8147145/
https://www.ncbi.nlm.nih.gov/pubmed/33946467
http://dx.doi.org/10.3390/plants10050907
work_keys_str_mv AT omerchen effectsofagronomicpracticesontheseverityofsweetbasildownymildewperonosporabelbahrii
AT nisanziv effectsofagronomicpracticesontheseverityofsweetbasildownymildewperonosporabelbahrii
AT ravdaviddalia effectsofagronomicpracticesontheseverityofsweetbasildownymildewperonosporabelbahrii
AT eladyigal effectsofagronomicpracticesontheseverityofsweetbasildownymildewperonosporabelbahrii