ARCHIVES
VOL. 10, ISSUE 1 (2025)
Insecticide resistance trend of Pymetrozine against Brown Plant Hopper populations of rice in different agro-climatic zones of Tamil Nadu
Authors
Prakash D, Chand Asaf, Ayyasamy R
Abstract
The widespread use of synthetic insecticides
to control Nilaparvata lugens (Stål) (Brown Plant Hopper, BPH), a major
threat to rice production in Asia, has unfortunately resulted in the evolution
of insecticide resistance in this pest over the past decades. This study
investigated insecticide use patterns and assessed the susceptibility of N.
lugens populations to Pymetrozine in major rice-growing regions of Tamil
Nadu, India. Results revealed significant deviations from recommended
insecticide doses, with farmers frequently applying higher than recommended
rates of Organophosphorus compounds, Neonicotinoids, and other insecticide
groups. This excessive use can increase the risk of environmental
contamination, enhance the selection pressure for insecticide resistance, and
potentially reduce efficacy. Bioassays revealed significant variations in
Pymetrozine susceptibility among BPH populations regions of Tamil Nadu. The
population from Villupuram exhibited the highest susceptibility, while the
Coimbatore population displayed the highest level of resistance with a
Resistance Ratio value of 20.17, indicating a significant increase in
resistance compared to the laboratory susceptible strain. These findings
highlight the urgent need for improved insecticide use practices, including the
adoption of Integrated Pest Management (IPM) strategies and regular monitoring
of insecticide resistance in BPH populations to ensure sustainable rice
production in Tamil Nadu.
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Pages:135-137
How to cite this article:
Prakash D, Chand Asaf, Ayyasamy R "Insecticide resistance trend of Pymetrozine against Brown Plant Hopper populations of rice in different agro-climatic zones of Tamil Nadu". International Journal of Entomology Research, Vol 10, Issue 1, 2025, Pages 135-137
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