In-vitro Evaluation of Botanicals and Fungicides against Ginger Leaf Spot caused by Phyllosticta zingiberi Ramakr

Author: Sampritha S., Pankaja N.S., Umashankar Kumar N. and Mahadeva J.

Download PDF

Abstract

Phyllosticta zingiberi Ramakr causing leaf spot of ginger is considered to be destructive, appearing in mild or severe form in all ginger growing tracts of the country. In Karnataka, amongst the various foliar diseases of ginger, occurrence of leaf spot disease caused by Phyllosticta zingiberi is significantly increasingwhich destroys the chlorophyllous tissues thereby causing significant reduction in rhizome yield. Therefore, the present study was conducted to know the effective fungicides, botanicals and bioagents for the management of the disease against five isolates of P. zingiberi pathogen. The contact fungicides mancozeb 75%WP recorded highest mycelial inhibition of 100 per cent at the least concentration tested (500ppm). In case of systemic fungicides Propiconazole 25%EC, Tebuconazole 25%EC and Difenconazole 25%EC recorded highest mycelial inhibition of 100 per cent at least concentration tested (500ppm). The combination product Carbendazim 12% + mancozeb 63%WP recorded highest per cent mycelial inhibition of 100 per cent at the least concentration tested (500ppm). Among different botanicals tested, 100 per cent mycelial inhibition was recorded by garlic clove extract. Among the bioagents B. subtilis recorded 100 per cent mycelial inhibition of all the isolates.

Keywords

Ginger leaf spot, Phyllosticta zingiberi, Mycelial Inhibition, Fungicides, Botanicals, Bioagents

Conclusion

Plant Disease management is very much important for preventing productivity losses. In recent years there is an increase in ginger leaf spot disease occurrence and severity which causes significant reduction in yield. The present findings revealed Mancozeb 75%WP, Propiconazole 25%EC and Carbendazim 12% + mancozeb 63%WP fungicides are effective against the pathogen in vitro. Also botanicals like garlic clove extract followed by neem and chilli extract and bioagents B. subtilis, P. fluorescens and T. viridae are effective in reducing the fungal growth.

References

-

How to cite this article

Sampritha S., Pankaja N.S., Umashankar Kumar N. and Mahadeva J. (2023). In-vitro Evaluation of Botanicals and Fungicides against Ginger Leaf Spot caused by Phyllosticta zingiberi Ramakr. Biological Forum – An International Journal, 15(5): 917-927.