Onion is a popular vegetable crop, which has been produced for its daily uses and economic benefits. Downey mildew caused by the fungus Peronospora destructor is among the most important yield-reducing factor in onion production. The effect of three different levels of plant population and fungicide frequency with two different fungicides was studied on downy mildew severity and yield of onion. Nineteen treatment of this Experiment included two fungicides mancozeb + metalaxyl and copper hydrox-ide, three different spraying interval with (10 days, 15 days and 21 days) and three level of plant population (0.71, 0.95 and 1.2 million plants/ha). The experiment was laid out in a randomized block design with three replications for two year at Fogera and for one year at Dera districts of South Gondar zone Ethiopia. Data on disease severity, bulb yield, bulb number and bulb size were recorded during the time of harvest. The price of bulb yield was assessed from the local market and the total price of the yield obtained from each treatment was computed on hectare basis. Input costs like seed, fungicides and labor were converted into hectare basis according to their frequencies used. Fungicides cost was estimated based on the price of the local market. Cost of the labor was in Birr per man-days; cost of spray and spray equipment to spray per hectare were also calculated. Based on the obtained data from the above mentioned parameters economic analysis was performed. The lowest disease severity was recorded in treatment were lowest level of plant population (0.71 million plant/hectare) spraying with fungicide mancozeb + metalaxyl within 15days interval. In this treatment bulb yield and bulb weight were the highest. The economic evaluation showed that the highest net benefit with acceptable marginal rate of return was obtained from T3 (0.71million plants/ha spraying with fungicide mancozeb + metalaxyl within 15days interval).
| Published in | American Journal of Plant Biology (Volume 9, Issue 4) |
| DOI | 10.11648/j.ajpb.20240904.11 |
| Page(s) | 100-105 |
| Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
| Copyright |
Copyright © The Author(s), 2024. Published by Science Publishing Group |
Audpc, Onion, Downy Mildew, Fungicide, Plant Density
| [1] | Muluneh BE, C Mosissa, OF Bikila. Major Onion (Allium cepa L.) Production Challenges in Ethiopia: A Review. Food Science and Quality Management, 86: 1-6. |
| [2] | Bewuketu Haile, Tsegaye Babege and Awalom Hailu. 2016. Diseases and Insect Pests of Onion (Allium cepa L.) in Masha District of Sheka Zone, South-West Ethiopia. Academia Journal of Agricultural Research 4(10): 629-632. |
| [3] | Adina G, D Yalew, M Berhan. 2021. Survey on Major Diseases of Vegetable and Tuber Crops in South Gondar Zone, Ethiopia. In: Birhanu et al., (ed.). Results of Plant Protection Research. Proceedings of the Completed Plant Protection Research Activities. p. 106-111. |
| [4] | Cook, H. T. (1932). Downy mildew disease of onion. NY Agric. Exp. Station. Ithaca, New York. Mem, 143, 1-40. |
| [5] | Viranyi, F. 1974. Downy mildew of onion. Novenyvdlem. 10: 205-209. |
| [6] | Yadav, P. M., Rakholiya, K. B. and Pawar, D. M. 2013. Evaluation of bioagents for management of the onion purple blotch and bulb yield loss assessment under field conditions. The Bioscan, 8 (4), 1295-1298. |
| [7] | Van Doorn, A. M. 1959. Onderzoekingen over het optreden en de bestrijding van valsemeeldauw (Peronospora destructor) bijuien. TijdschrivenPlantenziekten, 65, 193–255. |
| [8] | Maude, R. B. 1990. Leaf diseases of onions. In: "Onion and Allied Crops" H. D. Rabinowitch & J. L. Brewster (Ed.), pp. 173–212. Boca Raton: CRC. |
| [9] | Raziq, F., I. Alam, Naz, I. and Khan, H. 2008. Evaluation of fungicides for controlling downy mildew of onion under field conditions. Sarhad J. Agric. 24(1), 85- 92. |
| [10] | Pablo, H. Gonzalez and Colnago, P. 2011. Quantitative studies on downy mildew (Peronospora destructor Berk. Casp.) afecting onion seed production in southern Uruguay. Eur. J. Plant Pathol. 129, 303– 314. |
| [11] | Butler JE, SD Jones. 1955. Plant Pathol. Macmillan and Co., New York. 693 pp. Cook, H. T. 1932. Downy mildew disease of onion. N.Y. Agric. Exp. Station. Ithaca, New York. Mem. 143: 1-40. |
| [12] | Fazli R, A Ishtiaq, N Ishrat, K Hakim. 2008. Evaluation of Fungicides for Controlling Downy Mildew Of Onion Under Field Conditions. Sarhad Journal of Agriculture, 24 (1): 85-9. |
| [13] | Yemane K, B Derbew, A Fetien. 2013. Effect of intra-row spacing on yield and quality of some onion varieties (Allium cepa L.) at Aksum, Northern Ethiopia. African Journal of Plant Science, 7(12): 613-622. |
| [14] | Geisseler D, SO Roberto, J Diaz. 2022. Nitrogen nutrition and fertilization of onions (Allium cepaL.)- A literature review. Scientia Horticulturae, 291: 110591. |
| [15] | Mohibullah. 1992. Studies on major diseases of bulb vegetables (onion and garlic) in NWFP. Final Tech. Rep. Agric. Res. Instt. Tarnab. 130 pp. |
| [16] | Shaner G, RE Finney. 1997. The effect of nitrogen fertilization on the expression of slow mildewing resistance in wheat. Phytopathology, 67: 1051-1056. |
| [17] | CIMMYT (International Maize and Wheat Improvement Center). 1988. From Agronomic Data to Farmer Recommendations: An Economics Training Manual. Completely revised edition. Mexico, D.F. 84 p. |
| [18] | Stephen K, M Nicky. 2007. In service training on partial budgeting techniques. Mount Makulu, Lusaka, Zambia. |
| [19] | Aboukhadrah SH, AWAH El-Alsayed, L Sobhy, W Abdelmasieh. 2017. Response of onion yield and quality to different planting date, methods and density. Egyptian Journal of Agronomy, 39(2): 203-219. |
APA Style
Getinet, A., Yalew, D., Berhan, M. (2024). Influence of Plant Density and Fungicides on Downy Mildew (Peronospora Destructor) and Bulb Yield of Onion in Ethiopia. American Journal of Plant Biology, 9(4), 100-105. https://doi.org/10.11648/j.ajpb.20240904.11
ACS Style
Getinet, A.; Yalew, D.; Berhan, M. Influence of Plant Density and Fungicides on Downy Mildew (Peronospora Destructor) and Bulb Yield of Onion in Ethiopia. Am. J. Plant Biol. 2024, 9(4), 100-105. doi: 10.11648/j.ajpb.20240904.11
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Download@article{10.11648/j.ajpb.20240904.11,
author = {Adina Getinet and Desalegn Yalew and Muluadam Berhan},
title = {Influence of Plant Density and Fungicides on Downy Mildew (Peronospora Destructor) and Bulb Yield of Onion in Ethiopia
},
journal = {American Journal of Plant Biology},
volume = {9},
number = {4},
pages = {100-105},
doi = {10.11648/j.ajpb.20240904.11},
url = {https://doi.org/10.11648/j.ajpb.20240904.11},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajpb.20240904.11},
abstract = {Onion is a popular vegetable crop, which has been produced for its daily uses and economic benefits. Downey mildew caused by the fungus Peronospora destructor is among the most important yield-reducing factor in onion production. The effect of three different levels of plant population and fungicide frequency with two different fungicides was studied on downy mildew severity and yield of onion. Nineteen treatment of this Experiment included two fungicides mancozeb + metalaxyl and copper hydrox-ide, three different spraying interval with (10 days, 15 days and 21 days) and three level of plant population (0.71, 0.95 and 1.2 million plants/ha). The experiment was laid out in a randomized block design with three replications for two year at Fogera and for one year at Dera districts of South Gondar zone Ethiopia. Data on disease severity, bulb yield, bulb number and bulb size were recorded during the time of harvest. The price of bulb yield was assessed from the local market and the total price of the yield obtained from each treatment was computed on hectare basis. Input costs like seed, fungicides and labor were converted into hectare basis according to their frequencies used. Fungicides cost was estimated based on the price of the local market. Cost of the labor was in Birr per man-days; cost of spray and spray equipment to spray per hectare were also calculated. Based on the obtained data from the above mentioned parameters economic analysis was performed. The lowest disease severity was recorded in treatment were lowest level of plant population (0.71 million plant/hectare) spraying with fungicide mancozeb + metalaxyl within 15days interval. In this treatment bulb yield and bulb weight were the highest. The economic evaluation showed that the highest net benefit with acceptable marginal rate of return was obtained from T3 (0.71million plants/ha spraying with fungicide mancozeb + metalaxyl within 15days interval).
},
year = {2024}
}
TY - JOUR T1 - Influence of Plant Density and Fungicides on Downy Mildew (Peronospora Destructor) and Bulb Yield of Onion in Ethiopia AU - Adina Getinet AU - Desalegn Yalew AU - Muluadam Berhan Y1 - 2024/10/10 PY - 2024 N1 - https://doi.org/10.11648/j.ajpb.20240904.11 DO - 10.11648/j.ajpb.20240904.11 T2 - American Journal of Plant Biology JF - American Journal of Plant Biology JO - American Journal of Plant Biology SP - 100 EP - 105 PB - Science Publishing Group SN - 2578-8337 UR - https://doi.org/10.11648/j.ajpb.20240904.11 AB - Onion is a popular vegetable crop, which has been produced for its daily uses and economic benefits. Downey mildew caused by the fungus Peronospora destructor is among the most important yield-reducing factor in onion production. The effect of three different levels of plant population and fungicide frequency with two different fungicides was studied on downy mildew severity and yield of onion. Nineteen treatment of this Experiment included two fungicides mancozeb + metalaxyl and copper hydrox-ide, three different spraying interval with (10 days, 15 days and 21 days) and three level of plant population (0.71, 0.95 and 1.2 million plants/ha). The experiment was laid out in a randomized block design with three replications for two year at Fogera and for one year at Dera districts of South Gondar zone Ethiopia. Data on disease severity, bulb yield, bulb number and bulb size were recorded during the time of harvest. The price of bulb yield was assessed from the local market and the total price of the yield obtained from each treatment was computed on hectare basis. Input costs like seed, fungicides and labor were converted into hectare basis according to their frequencies used. Fungicides cost was estimated based on the price of the local market. Cost of the labor was in Birr per man-days; cost of spray and spray equipment to spray per hectare were also calculated. Based on the obtained data from the above mentioned parameters economic analysis was performed. The lowest disease severity was recorded in treatment were lowest level of plant population (0.71 million plant/hectare) spraying with fungicide mancozeb + metalaxyl within 15days interval. In this treatment bulb yield and bulb weight were the highest. The economic evaluation showed that the highest net benefit with acceptable marginal rate of return was obtained from T3 (0.71million plants/ha spraying with fungicide mancozeb + metalaxyl within 15days interval). VL - 9 IS - 4 ER -
Ethiopian Institute of Agricultural Research, Fogera National Rice Research and Training Center, Bahir Dar, Ethiopia
Ethiopian Institute of Agricultural Research, Fogera National Rice Research and Training Center, Bahir Dar, Ethiopia
Ethiopian Institute of Agricultural Research, Fogera National Rice Research and Training Center, Bahir Dar, Ethiopia
