Anthracnose of Onion (<i>Allium cepa</i> L.): A Twister Disease
The onion (<i>Allium cepa</i> L.) is a lucrative and high-value vegetable–spice crop in India, but it is sensitive to several of diseases caused by fungi, bacteria, viruses, and nematodes, of which a fungal disease, anthracnose, caused by <i>Colletotrichum</i> spp., is a majo...
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MDPI AG
2022-08-01
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| Series: | Pathogens |
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| author | Ram Dutta Jayalakshmi K. Sharath M. Nadig Dalasanuru Chandregowda Manjunathagowda Vishal S. Gurav Major Singh |
| author_facet | Ram Dutta Jayalakshmi K. Sharath M. Nadig Dalasanuru Chandregowda Manjunathagowda Vishal S. Gurav Major Singh |
| author_sort | Ram Dutta |
| collection | DOAJ |
| description | The onion (<i>Allium cepa</i> L.) is a lucrative and high-value vegetable–spice crop in India, but it is sensitive to several of diseases caused by fungi, bacteria, viruses, and nematodes, of which a fungal disease, anthracnose, caused by <i>Colletotrichum</i> spp., is a major issue for both onion producers and researchers since it severely affects the bulb production. Twister disease is currently one of the most common problems in onion production, particularly in humid regions, and it reduces productivity while also lowering the value and profitability. Twister disease is visualised by white or pale-yellow water-soaked oval depressed lesions on leaf blades, which are the first symptoms. Lesions expand as the disease advances, and numerous black-coloured, slightly elevated structures/fruiting bodies appear in the middle area, arranged in concentric rings. Curling, twisting, chlorosis of the leaves, and aberrant extension of the neck or pseudo-stem occurs, followed by rotting of the bulb. In an unmanaged crop, an excess gibberellin production by <i>Colletotrichum gloeosporioides</i> and <i>Gibberella moniliformis</i> is suspected to induce twisting and aberrant neck elongation, which will ruin onion productivity. It is difficult and environmentally unfriendly to control these infections. Since, to the best of our knowledge, this is the first review on onion anthracnose, we tried to consolidate information. This review updates our knowledge of the pathogen, including the disease cycle, infection pathways, and disease management techniques. As a result, growers will be benefit from the application of cultural, biological, and chemical measures and the use of resistant varieties. |
| first_indexed | 2024-03-09T03:59:27Z |
| format | Article |
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| language | English |
| last_indexed | 2024-03-09T03:59:27Z |
| publishDate | 2022-08-01 |
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| series | Pathogens |
| spelling | doaj.art-610ba465ac7847cc9ad82f0ac078416c2023-12-03T14:15:27ZengMDPI AGPathogens2076-08172022-08-0111888410.3390/pathogens11080884Anthracnose of Onion (<i>Allium cepa</i> L.): A Twister DiseaseRam Dutta0Jayalakshmi K.1Sharath M. Nadig2Dalasanuru Chandregowda Manjunathagowda3Vishal S. Gurav4Major Singh5ICAR-Directorate of Onion and Garlic Research, Pune 410505, MH, IndiaICAR-Directorate of Onion and Garlic Research, Pune 410505, MH, IndiaICAR-Directorate of Onion and Garlic Research, Pune 410505, MH, IndiaICAR-Directorate of Onion and Garlic Research, Pune 410505, MH, IndiaICAR-Directorate of Onion and Garlic Research, Pune 410505, MH, IndiaICAR-Directorate of Onion and Garlic Research, Pune 410505, MH, IndiaThe onion (<i>Allium cepa</i> L.) is a lucrative and high-value vegetable–spice crop in India, but it is sensitive to several of diseases caused by fungi, bacteria, viruses, and nematodes, of which a fungal disease, anthracnose, caused by <i>Colletotrichum</i> spp., is a major issue for both onion producers and researchers since it severely affects the bulb production. Twister disease is currently one of the most common problems in onion production, particularly in humid regions, and it reduces productivity while also lowering the value and profitability. Twister disease is visualised by white or pale-yellow water-soaked oval depressed lesions on leaf blades, which are the first symptoms. Lesions expand as the disease advances, and numerous black-coloured, slightly elevated structures/fruiting bodies appear in the middle area, arranged in concentric rings. Curling, twisting, chlorosis of the leaves, and aberrant extension of the neck or pseudo-stem occurs, followed by rotting of the bulb. In an unmanaged crop, an excess gibberellin production by <i>Colletotrichum gloeosporioides</i> and <i>Gibberella moniliformis</i> is suspected to induce twisting and aberrant neck elongation, which will ruin onion productivity. It is difficult and environmentally unfriendly to control these infections. Since, to the best of our knowledge, this is the first review on onion anthracnose, we tried to consolidate information. This review updates our knowledge of the pathogen, including the disease cycle, infection pathways, and disease management techniques. As a result, growers will be benefit from the application of cultural, biological, and chemical measures and the use of resistant varieties.https://www.mdpi.com/2076-0817/11/8/884anthracnose<i>Colletotrichum</i>integrated managementoniontwister disease |
| spellingShingle | Ram Dutta Jayalakshmi K. Sharath M. Nadig Dalasanuru Chandregowda Manjunathagowda Vishal S. Gurav Major Singh Anthracnose of Onion (<i>Allium cepa</i> L.): A Twister Disease Pathogens anthracnose <i>Colletotrichum</i> integrated management onion twister disease |
| title | Anthracnose of Onion (<i>Allium cepa</i> L.): A Twister Disease |
| title_full | Anthracnose of Onion (<i>Allium cepa</i> L.): A Twister Disease |
| title_fullStr | Anthracnose of Onion (<i>Allium cepa</i> L.): A Twister Disease |
| title_full_unstemmed | Anthracnose of Onion (<i>Allium cepa</i> L.): A Twister Disease |
| title_short | Anthracnose of Onion (<i>Allium cepa</i> L.): A Twister Disease |
| title_sort | anthracnose of onion i allium cepa i l a twister disease |
| topic | anthracnose <i>Colletotrichum</i> integrated management onion twister disease |
| url | https://www.mdpi.com/2076-0817/11/8/884 |
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