Fungicidal Effect of Guava Wood Vinegar against <i>Colletotrichum coccodes</i> Causing Black Dot Disease of Potatoes
Wood vinegar (WV) by-product of charcoal production is considered one of the most promising alternatives to synthetic pesticide and fertilizer applications, especially for organic production. Our goal in this study is to evaluate the efficacy of guava (<i>Psidium guajava</i>) WV to contr...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-06-01
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| Series: | Horticulturae |
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| Online Access: | https://www.mdpi.com/2311-7524/9/6/710 |
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| author | Mansour M. El-Fawy Kamal A. M. Abo-Elyousr Nashwa M. A. Sallam Rafeek M. I. El-Sharkawy Yasser Eid Ibrahim |
| author_facet | Mansour M. El-Fawy Kamal A. M. Abo-Elyousr Nashwa M. A. Sallam Rafeek M. I. El-Sharkawy Yasser Eid Ibrahim |
| author_sort | Mansour M. El-Fawy |
| collection | DOAJ |
| description | Wood vinegar (WV) by-product of charcoal production is considered one of the most promising alternatives to synthetic pesticide and fertilizer applications, especially for organic production. Our goal in this study is to evaluate the efficacy of guava (<i>Psidium guajava</i>) WV to control <i>Colletotrichum coccodes</i>, which causes black dot disease, and how it influences potato plant development and yield. This study tested the efficacy of guava WV against the pathogen both in vitro and under greenhouse conditions. Different guava WV concentrations were tested on pathogen growth development, including 0, 0.25%, 0.50%, 1%, 2%, and 3% (<i>v</i>/<i>v</i>). Data revealed that the pathogen’s mycelial growth was significantly inhibited at all the concentrations, and the highest inhibition (100%) was obtained at 3% guava WV. In greenhouse trials conducted for two seasons (2021 and 2022), guava WV applied as a foliar spray at the concentration of 2% and 3% considerably reduced the potato black dot severity evaluated as stem colonization (average of 22.9% for 2021, average of 22.5% for 2022), root covering with sclerotia (average of 21.7% for 2021, average of 18.3% for 2022) and wilted plants percentage (average of 27.8% for 2021, average of 33.3% for 2022). Overall, guava WV also showed a positive effect on plant growth by increasing plant height, stem diameter, and tuber yield per plant of treated potato in both seasons. Gas chromatography-mass spectrometry (GC-MS) analyses revealed the presence in guava WV of phenols, esters, organic acids, antioxidants, and alcohols. In conclusion, guava WV could represent a viable alternative for potato black dot disease management and for plant growth promotion. |
| first_indexed | 2024-03-11T02:23:36Z |
| format | Article |
| id | doaj.art-8f668a20119f43a2b3d9257caa833d0f |
| institution | Directory Open Access Journal |
| issn | 2311-7524 |
| language | English |
| last_indexed | 2024-03-11T02:23:36Z |
| publishDate | 2023-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Horticulturae |
| spelling | doaj.art-8f668a20119f43a2b3d9257caa833d0f2023-11-18T10:41:33ZengMDPI AGHorticulturae2311-75242023-06-019671010.3390/horticulturae9060710Fungicidal Effect of Guava Wood Vinegar against <i>Colletotrichum coccodes</i> Causing Black Dot Disease of PotatoesMansour M. El-Fawy0Kamal A. M. Abo-Elyousr1Nashwa M. A. Sallam2Rafeek M. I. El-Sharkawy3Yasser Eid Ibrahim4Plant Pathology Branch, Agricultural Botany Department, Faculty of Agriculture, Al-Azhar University (Assiut Branch), Assiut 71526, EgyptDepartment Agriculture, Faculty of Environmental Science, King Abdulaziz University, Jeddah 80208, Saudi ArabiaPlant Pathology Department, Faculty of Agriculture, Assiut University, Assiut 71526, EgyptPlant Pathology Branch, Agricultural Botany Department, Faculty of Agriculture, Al-Azhar University (Assiut Branch), Assiut 71526, EgyptPlant Protection, Plant Protection Department, College of Food and Agricultural Sciences, King Saud University, Riyadh 11451, Saudi ArabiaWood vinegar (WV) by-product of charcoal production is considered one of the most promising alternatives to synthetic pesticide and fertilizer applications, especially for organic production. Our goal in this study is to evaluate the efficacy of guava (<i>Psidium guajava</i>) WV to control <i>Colletotrichum coccodes</i>, which causes black dot disease, and how it influences potato plant development and yield. This study tested the efficacy of guava WV against the pathogen both in vitro and under greenhouse conditions. Different guava WV concentrations were tested on pathogen growth development, including 0, 0.25%, 0.50%, 1%, 2%, and 3% (<i>v</i>/<i>v</i>). Data revealed that the pathogen’s mycelial growth was significantly inhibited at all the concentrations, and the highest inhibition (100%) was obtained at 3% guava WV. In greenhouse trials conducted for two seasons (2021 and 2022), guava WV applied as a foliar spray at the concentration of 2% and 3% considerably reduced the potato black dot severity evaluated as stem colonization (average of 22.9% for 2021, average of 22.5% for 2022), root covering with sclerotia (average of 21.7% for 2021, average of 18.3% for 2022) and wilted plants percentage (average of 27.8% for 2021, average of 33.3% for 2022). Overall, guava WV also showed a positive effect on plant growth by increasing plant height, stem diameter, and tuber yield per plant of treated potato in both seasons. Gas chromatography-mass spectrometry (GC-MS) analyses revealed the presence in guava WV of phenols, esters, organic acids, antioxidants, and alcohols. In conclusion, guava WV could represent a viable alternative for potato black dot disease management and for plant growth promotion.https://www.mdpi.com/2311-7524/9/6/710potato<i>Colletotrichum coccodes</i>guava wood vinegar componentsGC-MS techniquegrowth inhibitionantifungal activity |
| spellingShingle | Mansour M. El-Fawy Kamal A. M. Abo-Elyousr Nashwa M. A. Sallam Rafeek M. I. El-Sharkawy Yasser Eid Ibrahim Fungicidal Effect of Guava Wood Vinegar against <i>Colletotrichum coccodes</i> Causing Black Dot Disease of Potatoes Horticulturae potato <i>Colletotrichum coccodes</i> guava wood vinegar components GC-MS technique growth inhibition antifungal activity |
| title | Fungicidal Effect of Guava Wood Vinegar against <i>Colletotrichum coccodes</i> Causing Black Dot Disease of Potatoes |
| title_full | Fungicidal Effect of Guava Wood Vinegar against <i>Colletotrichum coccodes</i> Causing Black Dot Disease of Potatoes |
| title_fullStr | Fungicidal Effect of Guava Wood Vinegar against <i>Colletotrichum coccodes</i> Causing Black Dot Disease of Potatoes |
| title_full_unstemmed | Fungicidal Effect of Guava Wood Vinegar against <i>Colletotrichum coccodes</i> Causing Black Dot Disease of Potatoes |
| title_short | Fungicidal Effect of Guava Wood Vinegar against <i>Colletotrichum coccodes</i> Causing Black Dot Disease of Potatoes |
| title_sort | fungicidal effect of guava wood vinegar against i colletotrichum coccodes i causing black dot disease of potatoes |
| topic | potato <i>Colletotrichum coccodes</i> guava wood vinegar components GC-MS technique growth inhibition antifungal activity |
| url | https://www.mdpi.com/2311-7524/9/6/710 |
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