author_facet Suthaparan, A.
Torre, S.
Stensvand, A.
Herrero, M. L.
Pettersen, R. I.
Gadoury, D. M.
Gislerød, H. R.
Suthaparan, A.
Torre, S.
Stensvand, A.
Herrero, M. L.
Pettersen, R. I.
Gadoury, D. M.
Gislerød, H. R.
author Suthaparan, A.
Torre, S.
Stensvand, A.
Herrero, M. L.
Pettersen, R. I.
Gadoury, D. M.
Gislerød, H. R.
spellingShingle Suthaparan, A.
Torre, S.
Stensvand, A.
Herrero, M. L.
Pettersen, R. I.
Gadoury, D. M.
Gislerød, H. R.
Plant Disease
Specific Light-Emitting Diodes Can Suppress Sporulation of Podosphaera pannosa on Greenhouse Roses
Plant Science
Agronomy and Crop Science
author_sort suthaparan, a.
spelling Suthaparan, A. Torre, S. Stensvand, A. Herrero, M. L. Pettersen, R. I. Gadoury, D. M. Gislerød, H. R. 0191-2917 1943-7692 Scientific Societies Plant Science Agronomy and Crop Science http://dx.doi.org/10.1094/pdis-94-9-1105 <jats:p> When rose plants bearing colonies of Podosphaera pannosa were placed in a wind tunnel, the number of conidia trapped was directly proportional to intensity of daylight-balanced (white) light from 5 to 150 μmol m<jats:sup>–2</jats:sup> s<jats:sup>–1</jats:sup>. Illumination of samples using blue (420 to 520 nm) light-emitting diodes (LEDs) increased the number of conidia trapped by a factor of approximately 2.7 over white light but germination of conidia under blue light was reduced by approximately 16.5% compared with conidia germination under white light. The number of conidia trapped under far-red (&gt;685 nm) LEDs was approximately 4.7 times higher than in white light, and 13.3 times higher than under red (575 to 675 nm) LEDs, and germination was not induced compared with white light. When mildewed plants were exposed to cycles of 18 h of white light followed by 6 h of blue, red, far-red light, or darkness, light from the red LEDs reduced the number of conidia trapped by approximately 88% compared with darkness or far-red light. Interrupting the above dark period with 1 h of light from red LEDs also reduced the number of conidia trapped, while a 1-h period of light from far-red following the 1 h of light from red LEDs nullified the suppressive effect of red light. Our results indicate that brief exposure to red light during the dark interval may be as effective as continuous illumination in suppressing powdery mildew in greenhouse rose plant (Rosa × hybrida). </jats:p> Specific Light-Emitting Diodes Can Suppress Sporulation of <i>Podosphaera pannosa</i> on Greenhouse Roses Plant Disease
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title Specific Light-Emitting Diodes Can Suppress Sporulation of Podosphaera pannosa on Greenhouse Roses
title_unstemmed Specific Light-Emitting Diodes Can Suppress Sporulation of Podosphaera pannosa on Greenhouse Roses
title_full Specific Light-Emitting Diodes Can Suppress Sporulation of Podosphaera pannosa on Greenhouse Roses
title_fullStr Specific Light-Emitting Diodes Can Suppress Sporulation of Podosphaera pannosa on Greenhouse Roses
title_full_unstemmed Specific Light-Emitting Diodes Can Suppress Sporulation of Podosphaera pannosa on Greenhouse Roses
title_short Specific Light-Emitting Diodes Can Suppress Sporulation of Podosphaera pannosa on Greenhouse Roses
title_sort specific light-emitting diodes can suppress sporulation of <i>podosphaera pannosa</i> on greenhouse roses
topic Plant Science
Agronomy and Crop Science
url http://dx.doi.org/10.1094/pdis-94-9-1105
publishDate 2010
physical 1105-1110
description <jats:p> When rose plants bearing colonies of Podosphaera pannosa were placed in a wind tunnel, the number of conidia trapped was directly proportional to intensity of daylight-balanced (white) light from 5 to 150 μmol m<jats:sup>–2</jats:sup> s<jats:sup>–1</jats:sup>. Illumination of samples using blue (420 to 520 nm) light-emitting diodes (LEDs) increased the number of conidia trapped by a factor of approximately 2.7 over white light but germination of conidia under blue light was reduced by approximately 16.5% compared with conidia germination under white light. The number of conidia trapped under far-red (&gt;685 nm) LEDs was approximately 4.7 times higher than in white light, and 13.3 times higher than under red (575 to 675 nm) LEDs, and germination was not induced compared with white light. When mildewed plants were exposed to cycles of 18 h of white light followed by 6 h of blue, red, far-red light, or darkness, light from the red LEDs reduced the number of conidia trapped by approximately 88% compared with darkness or far-red light. Interrupting the above dark period with 1 h of light from red LEDs also reduced the number of conidia trapped, while a 1-h period of light from far-red following the 1 h of light from red LEDs nullified the suppressive effect of red light. Our results indicate that brief exposure to red light during the dark interval may be as effective as continuous illumination in suppressing powdery mildew in greenhouse rose plant (Rosa × hybrida). </jats:p>
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author Suthaparan, A., Torre, S., Stensvand, A., Herrero, M. L., Pettersen, R. I., Gadoury, D. M., Gislerød, H. R.
author_facet Suthaparan, A., Torre, S., Stensvand, A., Herrero, M. L., Pettersen, R. I., Gadoury, D. M., Gislerød, H. R., Suthaparan, A., Torre, S., Stensvand, A., Herrero, M. L., Pettersen, R. I., Gadoury, D. M., Gislerød, H. R.
author_sort suthaparan, a.
container_issue 9
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container_title Plant Disease
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description <jats:p> When rose plants bearing colonies of Podosphaera pannosa were placed in a wind tunnel, the number of conidia trapped was directly proportional to intensity of daylight-balanced (white) light from 5 to 150 μmol m<jats:sup>–2</jats:sup> s<jats:sup>–1</jats:sup>. Illumination of samples using blue (420 to 520 nm) light-emitting diodes (LEDs) increased the number of conidia trapped by a factor of approximately 2.7 over white light but germination of conidia under blue light was reduced by approximately 16.5% compared with conidia germination under white light. The number of conidia trapped under far-red (&gt;685 nm) LEDs was approximately 4.7 times higher than in white light, and 13.3 times higher than under red (575 to 675 nm) LEDs, and germination was not induced compared with white light. When mildewed plants were exposed to cycles of 18 h of white light followed by 6 h of blue, red, far-red light, or darkness, light from the red LEDs reduced the number of conidia trapped by approximately 88% compared with darkness or far-red light. Interrupting the above dark period with 1 h of light from red LEDs also reduced the number of conidia trapped, while a 1-h period of light from far-red following the 1 h of light from red LEDs nullified the suppressive effect of red light. Our results indicate that brief exposure to red light during the dark interval may be as effective as continuous illumination in suppressing powdery mildew in greenhouse rose plant (Rosa × hybrida). </jats:p>
doi_str_mv 10.1094/pdis-94-9-1105
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spelling Suthaparan, A. Torre, S. Stensvand, A. Herrero, M. L. Pettersen, R. I. Gadoury, D. M. Gislerød, H. R. 0191-2917 1943-7692 Scientific Societies Plant Science Agronomy and Crop Science http://dx.doi.org/10.1094/pdis-94-9-1105 <jats:p> When rose plants bearing colonies of Podosphaera pannosa were placed in a wind tunnel, the number of conidia trapped was directly proportional to intensity of daylight-balanced (white) light from 5 to 150 μmol m<jats:sup>–2</jats:sup> s<jats:sup>–1</jats:sup>. Illumination of samples using blue (420 to 520 nm) light-emitting diodes (LEDs) increased the number of conidia trapped by a factor of approximately 2.7 over white light but germination of conidia under blue light was reduced by approximately 16.5% compared with conidia germination under white light. The number of conidia trapped under far-red (&gt;685 nm) LEDs was approximately 4.7 times higher than in white light, and 13.3 times higher than under red (575 to 675 nm) LEDs, and germination was not induced compared with white light. When mildewed plants were exposed to cycles of 18 h of white light followed by 6 h of blue, red, far-red light, or darkness, light from the red LEDs reduced the number of conidia trapped by approximately 88% compared with darkness or far-red light. Interrupting the above dark period with 1 h of light from red LEDs also reduced the number of conidia trapped, while a 1-h period of light from far-red following the 1 h of light from red LEDs nullified the suppressive effect of red light. Our results indicate that brief exposure to red light during the dark interval may be as effective as continuous illumination in suppressing powdery mildew in greenhouse rose plant (Rosa × hybrida). </jats:p> Specific Light-Emitting Diodes Can Suppress Sporulation of <i>Podosphaera pannosa</i> on Greenhouse Roses Plant Disease
spellingShingle Suthaparan, A., Torre, S., Stensvand, A., Herrero, M. L., Pettersen, R. I., Gadoury, D. M., Gislerød, H. R., Plant Disease, Specific Light-Emitting Diodes Can Suppress Sporulation of Podosphaera pannosa on Greenhouse Roses, Plant Science, Agronomy and Crop Science
title Specific Light-Emitting Diodes Can Suppress Sporulation of Podosphaera pannosa on Greenhouse Roses
title_full Specific Light-Emitting Diodes Can Suppress Sporulation of Podosphaera pannosa on Greenhouse Roses
title_fullStr Specific Light-Emitting Diodes Can Suppress Sporulation of Podosphaera pannosa on Greenhouse Roses
title_full_unstemmed Specific Light-Emitting Diodes Can Suppress Sporulation of Podosphaera pannosa on Greenhouse Roses
title_short Specific Light-Emitting Diodes Can Suppress Sporulation of Podosphaera pannosa on Greenhouse Roses
title_sort specific light-emitting diodes can suppress sporulation of <i>podosphaera pannosa</i> on greenhouse roses
title_unstemmed Specific Light-Emitting Diodes Can Suppress Sporulation of Podosphaera pannosa on Greenhouse Roses
topic Plant Science, Agronomy and Crop Science
url http://dx.doi.org/10.1094/pdis-94-9-1105