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
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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
AMA 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
