Natural Pest Control: Effectiveness of Strychnos nux-vomica Extracts in Rice Protection
Dhanapal. P
PG & Research Department of Zoology, Nehru Memorial College (Autonomous), Puthanampatti, 621 007, Affiliated to Bharathidasan University Tamil Nadu, India.
Ramesh. V *
PG & Research Department of Zoology, Nehru Memorial College (Autonomous), Puthanampatti, 621 007, Affiliated to Bharathidasan University Tamil Nadu, India.
*Author to whom correspondence should be addressed.
Abstract
The efficacy of Strychnos nux-vomica seed, bark, and leaf extracts was evaluated against two major rice pests, Cnaphalocrocismedinalis (rice leaf folder) and Nilaparvatalugens (brown planthopper), under Rabi and Kharif conditions. Field trials demonstrated a significant reduction in pest infestation and increased mortality rates with higher extract concentrations. Among the tested formulations, the seed extract at 1.25% concentration exhibited the highest insecticidal activity, achieving 52.16% and 80.58% mortality against C. medinalis and N. lugens, respectively. The bark and leaf extracts were also effective, with mortality rates reaching 50.57% and 54.95% for C. medinalis and 76.54% and 64.26% for N. lugens. In contrast, untreated control plots recorded substantially higher pest populations, underscoring the efficacy of S. nux-vomica extracts as biopesticides. These findings highlight the potential of S. nux-vomica, particularly its seed extract, as a sustainable and eco-friendly alternative to synthetic pesticides for integrated pest management in rice cultivation.
Keywords: Strychnos nux-vomica, rice pests, Cnaphalocrocismedinalis, Nilaparvatalugens, biopesticide, insecticidal activity, pest management, rice cultivation, botanical pesticide, eco-friendly pest control