Integration of host resistance and fungicides reduced ascochyta blight pressure and minimised yield loss in field pea (Pisum sativum L.) in southern Ethiopia
Taylor & Francis Group - Informa UK Limited
Ascochyta blight complex causes substantial yield losses and deteriorates seed quality of field pea worldwide. Field experiments were conducted to determine the effectiveness of an integrated approach consisting of host resistance and fungicides to reduce ascochyta blight progression and enhance yield performances of field pea for two seasons at Bonke and Chencha, Southern Ethiopia. Three field pea (Bursa, Burqitu and Tegegnech) varieties and three systemic (Carbonchlor, Matico and Othello-Top) fungicides, along with unsprayed controls, were arranged in a factorial randomised complete block design with three replications. Results showed that fungicide treated plots of each variety recorded the lowest progress rate, while control plots of Bursa, Burqitu and Tegegnech recorded the highest rate parameter (0.67, 0.60 and 0.451 units day−1), respectively at Bonke. Terminal mean severities were reduced by up to 24.6–43.7% and 20.1–43.7% due to fungicide applications over unsprayed plots at Chencha and Bonke, respectively. Moreover, triple applications of Othello-Top enhanced grain yield by 211% (Bursa), 204% (Burqitu) and 140% (Tegegnech) as compared to control plots at Bonke. A related pattern was noticed at Chencha areas. Economically, Burqitu with Othello-Top showed the highest net benefit and benefit–cost ratio of $2.35 × 103 ha−1 and 4.77 (Bonke) and 2.27 × 103 ha−1 and 3.76 (Chencha) in that order of presentation, followed by Matico, and found to be the most profitable management option due to monetary advantage; and it could be suggested for field pea growers.
Acknowledgements: This research work was financed by Southern Agricultural Research Institute, Ethiopia and duly acknowledged. We forward our appreciation to the staff of the Crop Research Work Process and drivers at Arba Minch Agricultural Research Center who technically supported and facilitated the research work. We would also like to acknowledge Holetta Agricultural Research Center, Ethiopian Institute of Agricultural Research for their kind supply of planting materials. Farmers deserve appreciation for their collaboration of study fields during the two cropping seasons. © 2022 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The Version of Scholarly Record of this Article is published in Acta Agriculturae Scandinavica, Section B — Soil & Plant Science, 2022, available online at: http://www.tandfonline.com/10.1080/09064710.2022.2136107 Keywords: Disease progression; fungicide; integration; severity; variety; yield; field pea; Pisum sativum L.; Africa; Ethiopia.
Getachew Gudero Mengesha, Habtamu Terefe, Abu Jambo Yae, Asnake Abera Arato, Merihun Gimja Betire, Tamirat Samuel Shago, Zemenu Fentahun Bires, Biniyam Boraysho Borano & Shiferaw Mekonnen Abebe (2022) Integration of host resistance and fungicides reduced ascochyta blight pressure and minimised yield loss in field pea (Pisum sativum L.) in southern Ethiopia, Acta Agriculturae Scandinavica, Section B — Soil & Plant Science, 72:1, 971-986, DOI: 10.1080/09064710.2022.2136107