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פותח על ידי קלירמאש פתרונות בע"מ -
Low temperatures enhance winter wilt of pepper plants caused by Pythium sp.
Year:
2012
Source of publication :
Phytoparasitica
Authors :
כהן, רוני
;
.
Volume :
40
Co-Authors:
Pivonia, S., Central and Northern Arava Research and Development, Sapir 86825, Israel
de Cock, A.W.A.M., CBS-KNAW, Fungal Biodiversity Centre, 3584 CT, Utrecht, Netherlands
Levita, R., Central and Northern Arava Research and Development, Sapir 86825, Israel
Etiel, E., Extension Service, Ministry of Agriculture, Be'er Sheva 84100, Israel
Cohen, R., Department of Plant Pathology, Newe Ya'ar Research Center, Ramat Yishay 30095, Israel
Facilitators :
From page:
525
To page:
531
(
Total pages:
7
)
Abstract:
Pepper is the main vegetable crop grown in the Arava region of southern Israel. It is grown in the winter in nethouses and greenhouses. Low temperature wilt of mature pepper plants has been known for years in this region. The incidence of plant wilting was usually low when the soil was pretreated with methyl bromide. In recent years methyl bromide usage has been banned and disease incidence has increased. The causal agent of this phenomenon was unknown until the current study. Pythium sp. was the most common microorganism genus isolated from wilted plant roots. Young pepper plants were artificially inoculated with Pythium isolated from wilted plants and maintained at temperatures of 20°, 14°, 10. 5° and 8. 6°C. Significant wilting was observed in plants grown at 8. 6°C, with symptoms starting 2 weeks after inoculation. At 10. 5°C wilting developed more slowly and inoculated plants maintained at 14° and 20°C did not exhibit any wilting symptoms. The unique variation in sporangium morphology and the sequence of the ribosomal internal transcribed spacer (ITS) suggest that a new species of Pythium is involved. The fungicide metalaxyl-M was found effective in controlling the disease in pot experiments. The relationship between low temperatures and high disease incidence can explain the high disease incidence in the Arava Valley of Israel during the cold winters of 1999-2000, 2004-2005 and 2006-2007. © 2012 Springer Science + Business Media B.V.
Note:
Related Files :
Arava Valley
Israel
Metalaxyl-M
Pythium
Pythium management
עוד תגיות
תוכן קשור
More details
DOI :
10.1007/s12600-012-0254-0
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
27003
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:27
Scientific Publication
Low temperatures enhance winter wilt of pepper plants caused by Pythium sp.
40
Pivonia, S., Central and Northern Arava Research and Development, Sapir 86825, Israel
de Cock, A.W.A.M., CBS-KNAW, Fungal Biodiversity Centre, 3584 CT, Utrecht, Netherlands
Levita, R., Central and Northern Arava Research and Development, Sapir 86825, Israel
Etiel, E., Extension Service, Ministry of Agriculture, Be'er Sheva 84100, Israel
Cohen, R., Department of Plant Pathology, Newe Ya'ar Research Center, Ramat Yishay 30095, Israel
Low temperatures enhance winter wilt of pepper plants caused by Pythium sp.
Pepper is the main vegetable crop grown in the Arava region of southern Israel. It is grown in the winter in nethouses and greenhouses. Low temperature wilt of mature pepper plants has been known for years in this region. The incidence of plant wilting was usually low when the soil was pretreated with methyl bromide. In recent years methyl bromide usage has been banned and disease incidence has increased. The causal agent of this phenomenon was unknown until the current study. Pythium sp. was the most common microorganism genus isolated from wilted plant roots. Young pepper plants were artificially inoculated with Pythium isolated from wilted plants and maintained at temperatures of 20°, 14°, 10. 5° and 8. 6°C. Significant wilting was observed in plants grown at 8. 6°C, with symptoms starting 2 weeks after inoculation. At 10. 5°C wilting developed more slowly and inoculated plants maintained at 14° and 20°C did not exhibit any wilting symptoms. The unique variation in sporangium morphology and the sequence of the ribosomal internal transcribed spacer (ITS) suggest that a new species of Pythium is involved. The fungicide metalaxyl-M was found effective in controlling the disease in pot experiments. The relationship between low temperatures and high disease incidence can explain the high disease incidence in the Arava Valley of Israel during the cold winters of 1999-2000, 2004-2005 and 2006-2007. © 2012 Springer Science + Business Media B.V.
Scientific Publication
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