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Efficacy of Essential oil Against Early Blight (Alternaria solani) of Tomato (Lycopersicon esculentum Mill.)

Author: Rajshree Karanwal*, Sobita Simon and Abhilasha A. Lal

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Abstract

Early blight caused by Alternaria solani is serious disease in tomato growing areas and occur as a pre – harvest as well as post – harvest brown to black spots appears on the leaves of tomato. Thyme essential oil at different concentrations (0.5%, 0.75%, 1.0% and 1.25%) along with mancozeb were tested at 0.25% in-vivo during Rabi 2020 – 2021 for their efficacy against disease incidence, plant growth and yield parameters of tomato at the Central Research Field of the Department of Plant Pathology, Sam Higginbottom University of Agriculture, Technology and Sciences, Prayagraj. The results of the present investigation revealed that significantly reduced the disease incidence. Among the treatments the minimum disease intensity (%) at 75 DAT was recorded in T_3 – Thyme essential oil @ 1.0% (25.51%). The maximum plant height (cm) of tomato was significantly increased in T_3 – Thyme essential oil @ 1.0% (60.18cm) and maximum number of branches was significantly recorded in

Keywords

Alternaria solani, Early blight, tomato, thyme essential oil.

Conclusion

The in-vivo studies revealed that minimum disease intensity (%) of tomato crop at 30, 45, 60 and 75 DAT, the maximum plant height, number of branches and maximum total yield (t/ha) were recorded in treatment T_3 – Thyme essential oil @ 1.0%. The findings of the present experiment are limited to one crop season (December 2020 to March 2021) under Prayagraj Agro-climatic conditions, as such to validate present findings more such trials should be carried out in future. As application of essential oil is applicable, safe and cost effective method for controlling such foliar diseases. Also, the use of essential oils in agriculture could be a suitable alternative for inclusion in disease control systems and do not leave a toxic residue in the product.

References

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How to cite this article

Karanwal, R., Simon, S. and Lal, A.A. (2021). Efficacy of Essential oil Against Early Blight (Alternaria solani) of Tomato (Lycopersicon esculentum Mill.). Biological Forum – An International Journal, 13(3a): 631-634.