Assessing yellow stem borer (Scirpophaga incertulas) incidence patterns in paddy (Oryza sativa) cultivation:Implications for climate change adaptation strategies

B N  BALAJI; L  VIJAYKUMAR

doi:10.56093/ijas.v95i4.154914

Authors

B N BALAJI College of Agriculture, University of Agricultural Sciences, Gandhi Krishi Vigyan Kendra, Bellary road, Bengaluru, Karnataka
L VIJAYKUMAR College of Agriculture, V C Farm, Mandya, Karnataka 571405, India

DOI:

https://doi.org/10.56093/ijas.v95i4.154914

Keywords:

Climate adaptation strategies, Climate change, Incidence patterns, Yellow stem borer

Abstract

Rising global food demand and the challenges posed by climate change necessitate sustainable agricultural practices, particularly in staple crop production like rice. The study was carried out during 2022–2023 at College of Agriculture, V C Farm, Mandya, Karnataka to investigate the incidence patterns of the yellow stem borer [Scirpophaga incertulas (Walker)], a significant threat to paddy (Oryza sativa L.) crops, in the context of climate change. The rice variety Jaya was taken for the study. Correlation analyses between meteorological variables and yellow stem borer infestation were performed to understand climate-driven impacts on pest dynamics. Results revealed varying infestation levels across transplanting dates, with early transplanting showing lower infestation rates. The peak pest incidence was recorded on the 15^th of October transplanted crop (14.94%), then 1^st of October (13.24%) and 15^th of March (11.51%). The lowest incidence was observed in 15^th January (0.37%) transplanted crop, followed by 1^st January and 1^st February transplanted crops. Meteorological factors such as minimum temperature and afternoon relative humidity showed a significant positive correlation and morning relative humidity had a significant negative correlation with dead heart. Meanwhile, maximum and minimum temperatures and rainy days recorded a significant negative correlation with white ears. These findings highlighted the critical need for adaptive agricultural strategies that respond to climate variability. Moving forward, strategies such as developing climate-resilient crop varieties and innovative pest management approaches are essential for sustaining rice production and global food security amidst evolving climatic conditions.

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