Journal of Environmental Biology

Impact of crop stage and season on burrow architecture and microclimate of Bandicota bengalensis in rice fields

S.V. Ramya¹, S.R. Namala²*, M.V. Krishnaji², A.K. Gadde² and T. Srinivas²     

¹Agricultural College, Acharya N G Ranga Agricultural University, Naira, Srikakulam-532 185, India

²Regional Agricultural Research Station, Acharya N G Ranga Agricultural University- 534 122, India

Received: 21 February 2025                   Revised: 17 April 2025                   Accepted: 28 June 2025

*Corresponding Author Email : n.srinivasarao@angrau.ac.in                  *ORCiD: https://orcid.org/0000-0003-4636-403X

Abstract

Aim: The study investigates the burrow ecology of the lesser bandicoot rat, Bandicota bengalensis, (Gray & Hardwicke) in irrigated rice ecosystems, focusing on seasonal variations, crop growth stages, and temperature influences.

Methodology: Field studies were conducted at the Regional Agricultural Research Station, Maruteru, Andhra Pradesh during 2022-2023. A total of 20 live burrows were examined across kharif, rabi and summer seasons, assessing burrow dimensions, branching patterns, depth and microclimate conditions. Temperature readings were recorded inside the burrows, in the surrounding soil, and from the atmosphere. The data were analysed using ANOVA and regression analysis to evaluate seasonal influences on burrow characteristics.

Results: Burrow dimensions varied across seasons and crop growth stages. Longer and more complex burrows were recorded during the rabi season, while deeper burrows were observed in summer, likely for temperature regulation. Temperature in the burrows were consistently lower when compared with the soil and atmospheric temperatures, with the highest temperature differences noted in summer, reducing heat stress for rodents.

Interpretation: Seasonal and crop growth stage variations significantly influence burrow architecture and microclimate. These findings enhance the understanding of rodent ecology and provide insights into developing more effective burrow fumigation and pest control strategies, ultimately mitigating rodent-induced crop losses in rice ecosystems.

Key words: Bandicota bengalensis, Burrow architecture, Microclimate, Rice ecosystem, Rodent management

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