Efficacy of Botanical Extracts on Early Blight Disease (Alternaria solani) in Tomato (Solanum lycopersicum L.)

Author: Kajol Kumari, Abhilasha A. Lal, Sneha Shikha and Rohit Maurya

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Abstract

Tomato having botanical name Solanum lycopersicum L. belongs to family Solanaceace which is one of the widely grown vegetables in the world. Early blight disease caused by Alternaria solani is one of the commonly found pathogen in tomato. It becomes wide spread and serious disease causing large economic loss at every stage of plant development. To reduce the use of chemical fungicides and its negative impact on environment and soil health, the management has been made to evaluate the effect of selected botanical leaf extracts in vivo during Rabi 2020-2021. Selected botanical leaf extracts viz., neem, eucalyptus, calotropis, datura at 5% concentration and mancozeb @0.2% were tested against the pathogen for their efficacy against the disease, plant growth and yield parameters. Among the all treatments, it was found that the plant height (28.84cm), number of leaves per plant (24.197) and yield (42.61 qha-1) significantly increased at 75 DAT in the treatment T2 - eucalyptus leaf extract. The disease intensity (%) (41.36%) significantly decreased in the treatment T2. Higher gross return value (Rs. 84,368 ha-1), net return value (Rs. 55,164 ha-1) and B:C ratio (2.89) was also found in the treatment T2-eucalyptus leaf extract @5% as compared to T5 -mancozeb and T0-control.

Keywords

Alternaria solani, early blight, calotropis, datura, eucalyptus, neem, tomato

Conclusion

In vivo results revealed that the minimum disease intensity (%) in tomato at 45, 60 and 75 DAT, maximum plant height (cm) at 45, 60 and 75 DAT, maximum number of leaves per plant, maximum yield (qha-1) and higher gross return value, net return value and B:C ratio was recorded in treatment T4 – eucalyptus leaf extracts @ 5%. Since chemicals have many detrimental effects on the environment as well as the human health, they would be viewed as better as they are eco-friendly and may also be supplied to the farmers for the efficient treatment of early blight disease of tomato. The findings of the present experiment are restricted to one crop season (December 2020 to March 2021) under Prayagraj agro-climatic condition, as such to confirm the present findings more such experiments need be carried out in future.

References

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How to cite this article

Kajol Kumari, Abhilasha A. Lal, Sneha Shikha and Rohit Maurya (2023). Efficacy of Botanical Extracts on Early Blight Disease (Alternaria solani) in Tomato (Solanum lycopersicum L.). Biological Forum – An International Journal, 15(3): 413-416.