Population Dynamics of Tomato Fruit borer (Helicoverpa armigera Hubner) Infesting Tomato (Lycopersicon esculentum Mill) Crops and their Correlation with Diverse Meteorological Factors under Field Condition

Author: Abhishek Yadav, D.R. Singh, S.K. Biswas, Ram Singh Umrao, Mahak Singh, Arushi Yadav and Arun Kumar

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Abstract

The investigation was carried out during Rabi season in 2021–2022, and 2022–2023, at Chandra Shekhar Azad University of Agriculture and Technology, Kanpur, in the Student Instructional Farm (SIF), geographically, the district of Kanpur Nagar is located between latitude 260 29' north and longitude 79031' and 80034' east. It is in the subtropical zone. It is located 125.9 metres above the gangetic alluvial in the centre of Uttar Pradesh. This experiment was conducted to study on the population dynamics of fruit borer Helicoverpa armigera Hubner on tomato, Lycopersicon esculentum Mill. "of insect-pest infesting tomato crops. It was found that tomato was attacked by tomato fruit borer (Helicoverpa armigera), H. armigera incidence reaching its peak population (7.70 larvae/ plant) in 12 th SMW (4th week of March) during 2021-22 while H. armigera incidence reaching its peak population (8.15 larvae/ plant) in 13 th SMW (4th week of March and first week of April ) during 2022-23. Correlation between tomato fruit borer and abiotic parameter in the year 2022 – 23 that the correlation revealed that larvae population of tomato fruit borer showed significant negative correlation with morning RH (r = -0.662**) and evening RH (r = -0.636**), significant positive correlation with maximum temperature (r = 0.962**), and non significant negative correlation with minimum temperature (r= -0.347), while evaporation have non significant positive correlation (r = .320) with population. The BSS (r = 0.580**) showed significant positive correlation and positive non significant correlation with rainfall (0.311) was observed with insect population. Correlation between tomato fruit borer and abiotic parameter in the year 2022 – 23 that the larval population of tomato fruit borer correlated with abiotic factors showed that significant positive (r = 0.829**) correlation with maximum temperature while negative significant relation found with minimum temperature. RH morning had positive significant (r = 0.655) relationship and negative significant (r = -0.643**) with the population of tomato fruit borer. The evaporation had significant positive (r = 0.432*) correlation while B.S.S (hr) had also significant positive ( r = 0.648**) relation with larval population.

Keywords

Population dynamics, Helicoverpa armigera, Tomato, Correlation, larvae, Azad T-6

Conclusion

Initial incidence of the Helicoverpa armigera Hubner was observed on 3.12.2021, in 48th standard week i.e., with a mean number of fruit infestation of 0.05. The fruit damage reached to peak by March 23, 2021 with mean larval population of 7.70 during 12nd standard week. More or less similar results of larval population of H. armigera were recorded during 2022-23. Initial incidence of the pest was observed on 2.12.2022, in 48th standard meteorological week i.e., with a mean fruit infestation of 0.20. The fruit damage reached to peak by March 28, 2023 with mean larval population of 8.15 during 13th standard meteorological week.

References

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How to cite this article

Abhishek Yadav, D.R. Singh, S.K. Biswas, Ram Singh Umrao, Mahak Singh, Arushi Yadav and Arun Kumar (2023). Population Dynamics of Tomato Fruit borer (Helicoverpa armigera Hubner) Infesting Tomato (Lycopersicon esculentum Mill) Crops and their Correlation with Diverse Meteorological Factors under Field Condition. Biological Forum – An International Journal, 15(9): 397-402.