Reaction of Popular Commercial varieties Against Alternaria alternata (Fr.) Keissler causing Blight in chrysanthemum

Author: Shankin K.R., Noorulla Haveri, Manjunath Hubballi, Basavarajappa M.P., Sanjeevraddi G. Reddi and Sateesh R. Patil

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Abstract

Alternaria blight caused by Alternaria alternata (Fr.) Keissler is one of the major fungal diseases limiting the cultivation and production of high-quality flowers in chrysanthemum. Finding out a source of resistance against the disease is one of the major concerns for a state like Karnataka who have higher potential in production of chrysanthemum for cut and loose purpose. So, on these lines, ten commercial varieties of chrysanthemum were taken in field condition to check their resistance against the incidence of Alternaria blight disease in natural epiphytotic condition. Of the grown varieties, Meghna Orange was the most highly susceptible variety was highest disease incidence 73.12 PDI and mean AUDPC value of 703.11 at which was followed by Marigold Yellow and Thanu Purple. Regarding flower yield, Thanu Purple showed the least yield at 3.20 t/ha Whereas, Aishwarya White was the only variety considered susceptible with least disease incidence of 34.69 PDI and mean AUDPC value of 275.41 and maximum flower yield of 8.53 t/ha. None of the tested varieties exhibited resistance reaction against Alternaria blight disease

Keywords

Alternaria, resistance, chrysanthemum, susceptible, disease, incidence

Conclusion

By studying the resistant reaction of popular commercial varieties of chrysanthemum against the incidence of Alternaria blight disease in field condition, it was observed that, of all the grown varieties “Meghna Orange” was considered as highly susceptible variety with highest percent disease incidence of 73.12 and with highest mean AUDPC value of 703.11 which was followed by “Marigold Yellow” and “Thanu Purple”. Regarding flower yield, variety “Thanu Purple” exhibited least yield at 3.20 t/ha. Whereas, “Aishwarya White” was the only variety considered as susceptible with least percent disease incidence of 34.69 and mean AUDPC value of 275.41. It was also the variety with maximum flower yield of 8.53 t/ha. Finally, it was also observed that, all the commercial varieties tested against Alternaria blight in chrysanthemum at Bagalkot are susceptible to disease and there are no varieties among the tested showing resistance reaction against the disease incidence

References

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How to cite this article

Shankin K.R., Noorulla Haveri, Manjunath Hubballi, Basavarajappa M.P., Sanjeevraddi G. Reddi and Sateesh R. Patil (2024). Reaction of Popular Commercial varieties Against Alternaria alternata (Fr.) Keissler causing Blight in chrysanthemum. Biological Forum – An International Journal, 16(4): 01-04