Survey and Response of different Planting Dates against Turmeric Leaf Spot Disease caused by Colletotrichum capsici

Author: Sangameshwar, Sadanand K. Mushrif, Mahesh Y.S., Kiran Kumar K.C., Shankar Meti and Mallikarjun Awati

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Abstract

Turmeric is one of the important spice crops in India. Though the crop is valued much socio-economically and medicinally, the yields are not realized to its potentiality due to various factors viz., subsistence farming, popular varieties being susceptible to biotic and abiotic stresses and limited use of pesticides. Among the biotic factors, the turmeric leaf spot disease caused by Colletotrichum capsici is a limiting factor in turmeric cultivation in Karnataka. Hence, a study was undertaken to understand the prevalence of the disease in Karnataka and the influence of manipulation of the planting dates on the disease behaviour. A roving survey undertaken in Kalaburgi, Belgavi and Bagalkot districts of North Karnataka and Chamarajanagara district of South Karnataka during the year 2015-16 revealed that the disease severity (Per cent Disease Index) varied from 16.25 per cent to 70 per cent. Maximum PDI of 38.89 was observed in Chamarajanagara district whereas, it was minimum PDI (26.98) in Bagalkot district. The variety Cuddapah was susceptible with PDI ranging from 27.67 to 70.00 while the variety Alleppy was moderately resistant with PDI ranging from 17.50 to 22.50. The results on studies on the influence of different planting dates on disease development variety Cuddapah carried out at UHS Bagalkot, Karnataka, revealed that the crop sown on 1st August (late sown crop) registered maximum disease severity with PDI of 58.24 and yielded least fresh rhizome (27.41 t/ha) than the crop sown on May 1st (early sown crop) with an average PDI of 38.59 and highest fresh rhizome yield (34.07 t/ha). Such studies may be useful for taking up appropriate control measures and trace out the resistant varieties available if any and if the varieties are popular but susceptible then it is advisable to manipulate the planting dates that could identify the production period with less disease incidence.

Keywords

Survey, Colletotrichum capsici, dates of planting

Conclusion

The present study concludes that the anthracnose disease of turmeric is present in all the surveyed turmeric growing areas in Karnataka with varied disease intensities. Chamarajanagara district of South Karnataka was found to be more prone to the disease attack than Bagalkot district. The variety Cuddapah though popular among the farmers was susceptible to turmeric leaf spot disease than Alleppy which was moderately resistant. The early sown turmeric crop (1st May) registered least disease severity with highest fresh rhizome yield than the late sown turmeric crop (1st August). Therefore, future studies are very much essential to understand the performance of different varieties in particular the resistant ones in those localities where they either have not been popular or ignored by the farmers for many reasons.

References

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How to cite this article

Sangameshwar, Sadanand K. Mushrif, Mahesh Y.S., Kiran Kumar K.C., Shankar Meti and Mallikarjun Awati (2022). Survey and Response of different Planting Dates against Turmeric Leaf Spot Disease caused by Colletotrichum capsici. Biological Forum – An International Journal, 14(4): 502-508.