Also known as Partial bunt
Tilletia indica, syn. Neovossia indica
- Symptoms: Karnal bunt is not easily detected prior to harvest, since it is usual for only a few kernels per spike to be affected by the disease. Following harvest, diseased kernels can be easily detected by visual inspection: a mass of black teliospores replaces a portion of the endosperm, and the pericarp may be intact or ruptured. Diseased kernels give off a fetid or fishy odor when crushed.
- Development: Karnal bunt is a seed- or soil-borne, floral infecting disease. lnoculum (teliospores) on or near the soil surface germinates, producing sporidia, which are carried by wind to the floral structures. These sporidia in turn germinate and penetrate the glumes, rachis, or the ovary itself. The fungus enters the newly formed kernel and develops in the intercellular space between the endosperm and seed coat. The degree of disease establishment and development depends on environmental conditions from spike emergence through grain filling.
- Hosts/Distribution: Karnal bunt can affect wheat, triticale, rye, and several other related grasses, but not barley. The disease is endemic in the Asian Subcontinent and now in Mexico.
- Importance: Karnal bunt is a relatively minor disease. Actual losses in yield are minimal, but the disease is on the quarantine lists of many countries and therefore of importance in world grain trade.
| Disease progression of Karnal Bunt | ||
|---|---|---|
| Healthy seed | Point or trace infection | 10% infection |
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| 30% infection | 50% infection | 100% infection |
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References
CIMMYT welcomes your comments / corrections / discussions
We will appreciate if you contact us about any inaccuracies in the information provided in Wheat Doctor. Corrections will be evaluated and incorporated as soon as possible. Similarly, you can raise questions or start discussions related to the Wheat Doctor content. In this case, however, authors do not guarantee response. This is not a consultancy service. We also reserve the right to delete inappropriate content.
We will appreciate if you contact us about any inaccuracies in the information provided in Wheat Doctor. Corrections will be evaluated and incorporated as soon as possible. Similarly, you can raise questions or start discussions related to the Wheat Doctor content. In this case, however, authors do not guarantee response. This is not a consultancy service. We also reserve the right to delete inappropriate content.
Comments (2)
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|189.157.28.xxx |2010-07-20 14:18:58 gustavo villarreal maurime fue de gran utilidad conocer que el carbon parcial no ataca a la cebada, pues existe una siembra de trigo infestado junto a una siembra de cebada.
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|119.152.82.xxx |2010-08-11 00:58:39 Ghazanfar Ali - Seed Treatment for Kernal BuntIs seed treatment effective for Kernal Bunt control. If yes could you please enlist the products those are effective against Kernal BUnt for seed treatment.
If not, please guide what are best measures to minimize the impact of Kernal Bunt in wheat crop
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