Screening of Marigold Germplasm against Leaf Spot and Flower Blight Disease under Field conditions in North Western Himalayas

Author: Vakul Sood, A.K. Singh, Diksha Sinha and Sonali Parwan

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Abstract

Leaf spot and flower blight disease in marigold caused by Alternaria sp. is the most destructive disease, causing losses in all the marigold growing areas of India. Planting resistant and moderately disease resistant cultivars is one of the most sustainable disease management strategies to alleviate economic losses. Field screening of marigold germplasm was taken up in 2017 & 2018. The leaf spot severity as well as flower blight incidence was found to be the highest in cv. Pusa Narangi (78.03 per cent and 66.66 per cent respectively) and the lowest in cultivar Marigold Red (16.07 per cent and 9.50 per cent respectively). Among the eight genotypes, cv. Marigold Red was found moderately resistant; Jaffery Lal was moderately susceptible; Kesariya was susceptible and five genotypes viz., Pusa Narangi, Pusa Bahar, Pusa Basanti, Jaffery Orange, Jaffery Yellow were found to be highly susceptible.

Keywords

Alternaria sp., flower blight, germplasm screening, leaf spot

Conclusion

Eight marigold cultivars were screened under field conditions against leaf spot and flower blight disease, and it was found that no cultivar was resistant to the disease. Pusa Narangi, Pusa Bahar, Pusa Basanti, Jaffery yellow and Jaffery Orange were found highly susceptible, Kesariya was susceptible and Jaferry Lal was moderately susceptible whereas Marigold Red was moderately resistant.

References

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How to cite this article

Vakul Sood, A.K. Singh, Diksha Sinha and Sonali Parwan (2023). Screening of Marigold Germplasm Against Leaf Spot and Flower Blight Disease under Field conditions in North Western Himalayas. Biological Forum – An International Journal, 15(5): 430-432.