Bio-efficacy and Economics of Newer Insecticides against Mustard Aphid, Lipaphis erysimi (Kalt.) on Indian Mustard
Year: 2026
Type: article
Abstract: A field experiment was conducted during the rabi season of 2024–25 at R.B.S. College, Bichpuri, Agra (Uttar Pradesh), to evaluate the bio-efficacy of seven newer insecticides, viz., imidacloprid 17.8 SL, thiamethoxam 25 WG, acephate 75 SP, acetamiprid 20 SP, dimethoate 30 EC, diafenthiuron 50 WP and fipronil 5 SC, against the mustard aphid, Lipaphis erysimi (Kalt.). The experiment was laid out in a randomised block design with three replications. A single foliar spray was applied on 18 January 2025 following sufficient pest population build-up. Among the treatments, imidacloprid 17.8 SL recorded the highest mean population reduction (93.97%), followed by thiamethoxam 25 WG (86.35%) and dimethoate 30 EC (83.71%). Conversely, fipronil 5 SC (61.79%), acephate 75 SP (66.14%) and diafenthiuron 50 WP (69.05%) proved the least effective. In terms of productivity and economics, imidacloprid 17.8 SL recorded the highest seed yield (39.49 q ha⁻¹), zero avoidable yield loss, the highest net returns (₹1,91,448 ha⁻¹), and a benefit–cost (B:C) ratio of 6.04:1, followed closely by thiamethoxam 25 WG and dimethoate 30 EC. In comparison, the untreated control registered the lowest seed yield (25.33 q ha⁻¹) and B:C ratio (3.56:1). Overall, imidacloprid 17.8 SL and thiamethoxam 25 WG emerged as the most effective and economically viable interventions for the management of L. erysimi in mustard under integrated pest management (IPM) programmes.
Institutions: Raja Balwant Singh College, St. John's College, Agra
Language: English
Subfield: Plant Science
Domain: Life Sciences
Open Access status: diamond
OpenAlex ID: W7225624629
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