Date
2019-11-07Author
Kgatle, Mahlane GodfreyFlett, BradleyTruter, MarietteRamusi, MosesAveling, Theresa Ann SheilaSubject
630 AgricultureMetadata
Show full item record
Aufsatz
Distribution of Alternaria leaf blight of sunflowers caused by Alternaria alternata in South Africa
Abstract
Alternaria leaf blight (ALB) has been shown in recent years to be one of the major potential disease threats of sunflower capable of causing yield losses in all major production areas. The aim of this study was to determine the causal agent, prevalence and geographical distribution of ALB in the major sunflower production areas of South Africa. Surveys were conducted during 2012/13, 2013/14 and 2014/15 growing seasons at commercial sunflower production fields and at commercial cultivar trials. In the three growing seasons, twenty-nine sunflower commercial production sites were surveyed for ALB disease severity. Furthermore, four cultivars (AGSUN8251, PHB65A25, SY4200 and PAN7049) were surveyed for ALB during cultivar trials in a total of 25 localities during the three growing seasons. The plants were surveyed between 90 to 120 days after planting and leaves showing ALB symptoms were collected. Alternaria alternata was identified as the primary disease-causing organism of ALB in all the fields. Wesselsbron consistently had the lowest ALB disease severity during the 2013/14 and 2014/15 growing seasons, whereas Potchefstroom had the highest disease severity in all three growing seasons. Pearson’s correlation coefficient was greatest for temperature (r=0.6 in 2012/13, r=0.71 in 2013/14 and r=0.84 in 2014/15) and disease severity in all the growing seasons. Information about the distribution of sunflower diseases is important and this survey demonstrated that A. alternata is widespread across sunflower production areas in South Africa and may result in potential yield losses.
Citation
In: Journal of Agriculture and Rural Development in the Tropics and Subtropics (JARTS) Vol. 120 / No. 1 (2019-11-07) , S. 71-77 ; ISSN 2363-6033Additional Information
Gedruckte Ausg. im Verlag Kassel Univ. Press (www.upress.uni-kassel.de) erschienen.Collections
Vol 120, No 1 (2019) (Journal of Agriculture and Rural Development in the Tropics and Subtropics (JARTS))Citation
@article{doi:10.17170/kobra-20190613558,
author={Kgatle, Mahlane Godfrey and Flett, Bradley and Truter, Mariette and Ramusi, Moses and Aveling, Theresa Ann Sheila},
title={Distribution of Alternaria leaf blight of sunflowers caused by Alternaria alternata in South Africa},
journal={Journal of Agriculture and Rural Development in the Tropics and Subtropics (JARTS)},
year={2019}
}
0500 Oax 0501 Text $btxt$2rdacontent 0502 Computermedien $bc$2rdacarrier 1100 2019$n2019 1500 1/eng 2050 ##0##http://hdl.handle.net/123456789/11343 3000 Kgatle, Mahlane Godfrey 3010 Flett, Bradley 3010 Truter, Mariette 3010 Ramusi, Moses 3010 Aveling, Theresa Ann Sheila 4000 Distribution of Alternaria leaf blight of sunflowers caused by Alternaria alternata in South Africa / Kgatle, Mahlane Godfrey 4030 4060 Online-Ressource 4085 ##0##=u http://nbn-resolving.de/http://hdl.handle.net/123456789/11343=x R 4204 \$dAufsatz 4170 7136 ##0##http://hdl.handle.net/123456789/11343
2019-11-11T17:06:28Z 2019-11-11T17:06:28Z 2019-11-07 doi:10.17170/kobra-20190613558 http://hdl.handle.net/123456789/11343 Gedruckte Ausg. im Verlag Kassel Univ. Press (www.upress.uni-kassel.de) erschienen. eng Urheberrechtlich geschützt https://rightsstatements.org/page/InC/1.0/ cultivar trials disease severity environmental factors geographical distribution Helianthus annuus 630 Distribution of Alternaria leaf blight of sunflowers caused by Alternaria alternata in South Africa Aufsatz Alternaria leaf blight (ALB) has been shown in recent years to be one of the major potential disease threats of sunflower capable of causing yield losses in all major production areas. The aim of this study was to determine the causal agent, prevalence and geographical distribution of ALB in the major sunflower production areas of South Africa. Surveys were conducted during 2012/13, 2013/14 and 2014/15 growing seasons at commercial sunflower production fields and at commercial cultivar trials. In the three growing seasons, twenty-nine sunflower commercial production sites were surveyed for ALB disease severity. Furthermore, four cultivars (AGSUN8251, PHB65A25, SY4200 and PAN7049) were surveyed for ALB during cultivar trials in a total of 25 localities during the three growing seasons. The plants were surveyed between 90 to 120 days after planting and leaves showing ALB symptoms were collected. Alternaria alternata was identified as the primary disease-causing organism of ALB in all the fields. Wesselsbron consistently had the lowest ALB disease severity during the 2013/14 and 2014/15 growing seasons, whereas Potchefstroom had the highest disease severity in all three growing seasons. Pearson’s correlation coefficient was greatest for temperature (r=0.6 in 2012/13, r=0.71 in 2013/14 and r=0.84 in 2014/15) and disease severity in all the growing seasons. Information about the distribution of sunflower diseases is important and this survey demonstrated that A. alternata is widespread across sunflower production areas in South Africa and may result in potential yield losses. open access Kgatle, Mahlane Godfrey Flett, Bradley Truter, Mariette Ramusi, Moses Aveling, Theresa Ann Sheila publishedVersion ISSN 2363-6033 No. 1 Journal of Agriculture and Rural Development in the Tropics and Subtropics (JARTS) 71-77 Vol. 120
The following license files are associated with this item:
:Urheberrechtlich geschützt