Merga Jibat, Shamil Alo
Abstract
Black pod disease of cocoa (Theobroma cacao L.) caused by Phytophthora palmivora is the major constraint in cocoa production in southwestern Ethiopia. Therefore, integrated field management trials were conducted to evaluate the efficacy of different fungicides against a disease epidemic of cocoa black pod in southwestern Ethiopia. The field experiment was laid out in a randomized complete block design with seven treatments and three replications. The experiment was performed during the 2021 and 2022 main cropping seasons using five fungicides: Copper oxychloride (Koka blue 50 WG) combined with cultural practices, Agro-laxyl 63.5 WP (Metalaxyl + Mancozeb) combined with cultural practices, Progress 250 EC (Propiconazole 25%) combined with cultural practices, Ethiozeb 80% WP (Mancozeb) combined with cultural practices, More 720 WP (Mancozeb +Cymoxanil) combined with cultural practices, cultural practices alone and control without any cultural practices and fungicides spray for control of black pod infection. Cultural practices such as nutrient management, pruning, plant and field hygiene etc. were implemented in all treatments except control. The results of the experiment indicated that copper oxychloride (Koka blue 50 WG) combined with cultural practices significantly affected the cocoa black pod epidemics. When paired with cultural practices, copper oxychloride (Koka blue 50 WG) had a considerably greater impact on lowering disease severity (4.76) than the other treatments. Additionally, compared to control plots, the incidence of disease was reduced by more than 50% when cultural practices alone were used. This shows that in farms where black pod disease severity is low, the disease may be economically managed by implementing cultural measures alone. So, the the study's findings, black pod disease can be controlled in areas with a high disease incidence by combining the application of copper oxychloride (Koka blue 50 WG) with other cultural practices.
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References
Akrofi, A.Y. 2000. Managing Phytophthora megakarya pod rot disease: the Ghana experience. In: Bong, C.L., Lee, C.H., Shari, F.S. (Eds.), Proc. INCOPED 3rd International Seminar, Kota Kinabalu, Sabah, Malaysia, 16–17 October, 2000, pp. 78–83.
Akrofi, A.Y. and Appiah, A.A. 1995. Phytophthora pod rot control trials; intervals of fungicide application trial at Tafo and Bechem. Annual Report, Cocoa Research Institute, Ghana, 1993/94, pp. 74–77.
R. Chandra Mohanan, P. Peter, and K. Sharadraj, “Production technology of coir pith cake formulation of Trichoderma harzianum,” Research Article Journal of Plantation Crops, vol. 41, no. 2, pp. 214–218, 2013.
C. De Beukelaer, “Creative industries in ‘developing’ countries: Questioning country classifications in the UNCTAD creative economy reports,” Cultural Trends, vol. 23, no. 4, pp. 232–251, May 2014.
D. Guest, “Black Pod: Diverse Pathogens with a Global Impact on Cocoa Yield,” Phytopathology, vol. 97, no. 12, pp. 1650–1653, Dec. 2007.
D. Guest and B. Grant, “The Complex Action Of Phosphonates As Antifungal Agents,” Biological Reviews, vol. 66, no. 2, pp. 159–187, May 1991.
Ndoumbe Nkeng, M., Cilas, C., Nyemb, E., Nyassé, S., Bieysse, D., Flori, A. and Sache, I. “Impact of removing diseased pods on cocoa black pod caused by Phytophthora megakarya and on cocoa production in Cameroon,” Crop Protection, vol. 23, no. 5, pp. 415–424, May 2004.
I. Opoku, A. Appiah, A. Akrofi, and G. Owusu, “Phytophthora megakarya: A potential threat to the cocoa industry in Ghana,” Ghana Journal of Agricultural Science, vol. 33, no. 2, Feb. 2000.
Poelmans, E. and Swinnen, J. 2016. A brief economic history of chocolate. The economics of chocolate, Oxford Academic Books. pp. 11-42.
SAS Institute. 2003. SAS/STAT User’s Guide, Version 9.3. Cary, SAS Institute Inc, NC, USA.
E. K. Tham-Agyekumet, F. Ankuyi, “Local Voices for Cocoa Production: Experiences of Ghanaian Cocoa Farmers on Community Radio,” International Journal on Food, Agriculture and Natural Resources, vol. 4, no. 1, pp. 34–43, Mar. 2023.
A. J. DM. Franco, Merca, F. E., Rodriguez, M. S., Balidion, J. F., Migo, V. P., Amalin, D. M., Alocilja, E. C., & Fernando, L. M. “DNA-based electrochemical nanobiosensor for the detection of Phytophthora palmivora (Butler) Butler, causing black pod rot in cacao (Theobroma cacao L.) pods,” Physiological and Molecular Plant Pathology, vol. 107, pp. 14–20, Aug. 2019.
DOI: https://doi.org/10.46676/ij-fanres.v4i3.150
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