ijimsrInternational Journal of Innovation in Multidisciplinary Scientific ResearchCoVolume -3 | Issue - 1 | 2025MultidisciplinaryEnglishOCT - DECNNY20251231BiotechnologyBioefficacy of Synthetic Pyrethroid and Organophosphate Insecticides against H.armigera on Pigeonpea (Cajanus Cajan)EnglishY2531SamratKavishwarEnglishNSonikaKochharEnglishYRashmiUrkudeEnglishYAshishDhundeEnglishYIJIMSR.2025.3126The synthetic pesticides have been employed to increase the agrarian produce and quality. However excessive use of pesticides results in their persistence, toxicity and is known to have potential adverse effects on the environment and human health at even very minute concentration levels also. To address this problem aandnbsp; field experiment based on a Randomized Block Design (RBD) with three replications of seven treatments was conducted over two consecutive years to assess the bioefficacy of two insecticides namely profenofos 50 EC (an organophosphate) and deltamethrin 2.8 EC (a synthetic pyrethroid) against Helicoverpa armigera (pod borer) infesting pigeonpea (Cajanus cajan). Profenofos was applied at concentrations of 0.09% (low), 0.125% (recommended), and 0.13% (high), while deltamethrin was tested at 0.0012%, 0.0028%, and 0.0040%. Observations were recorded by sampling five plants per plot, and data were statistically analyzed. All insecticidal treatments significantly reduced H.armigera infestation compared to the untreated control. The highest efficacy was recorded with profenofos at 0.13%, resulting in the lowest pod damage (13.17%), followed by 0.125% (15%) and 0.09% (16.67%). Deltamethrin at 0.0040%, 0.0028%, and 0.0012% led to pod damage levels of 17.35%, 18.65%, and 19.84%, respectively. The untreated control recorded the highest damage at 29.33%. These results highlight profenofos as more effective than deltamethrin in managing H. armigera infestation in pigeonpea.EnglishRBD, profenofos, deltamethrin, pigeonpea, H.armigerahttps://ijimsr.org/admin/abstract?id=43References1619Ghosh, A., Chatterjee, M. L., andamp; Roy, A. (2019). Insect pest management in pigeonpea and chickpea: An integrated approach. Journal of Entomology and Zoology Studies, 7(3), 382andndash;389.Subramanian, S., et al. (2020). Ecological engineering for pest management: An overview. Indian Journal of Entomology, 82(4), 754andndash;761.Saxena, K. B. (2012). Genetic Improvement of Pigeonpea. Tropical Plant Biology, 1,159 178.Srivastav, C.P., Joshi, N., andamp; Trivedi, T.P.andnbsp; (2010).Forecasting of Helicoverpa armigera populations and impact of climate change, Indian Journal of Agriculture Sciences, 80, 3-10.Chandurkar, P.S., Thakur, J.N., andamp; Shukla, R.M. (2005). Indian scenario of plant protection with special reference to Helicoverpa armigera-past, present and future. In Saxena H, Rai AB,Ahmed R,Sanjeev G (eds) Recent advances in Helicoverpa management. Indian Society of Pulses Research and Development, IIPR, 1-10.Kochhar,S andamp; Urkude,R, (2019). Bioefficacy of andAlpha;-Cyano Pyrethroid and Phenyl Organothiophosphate Insecticide against H.Armigera on Pigeonpea IJCESR, 2393-8374, vol-6, (1).Singh, S. P., and Singh, Y. (2001). Control of pod borers on pigeonpea. Indian Journal of Entomology. 63(3), 356-359.Kumar, A., andamp; Nath, P. (2003).Effect of insecticides on the extent of pod damage and seed damage by podfly (Melanagromyza obtuse Malloch) and pod borer Helicoverpa armigera Hubner in Bahar cultivar of pigeonpea. Annals Agric. Res., 24(4), 934-942.Fulshankar, A. M. (2005).Population dynamics, biometrical analysis and life table studies of Helicoverpa armigera (hubner) on different hosts and its management on chickpea.Ph.D.thesis.Junagadh Agricultural University JunagadhYadav, J.L., Chauhan, R., andamp; Yadav, P.R. (2000).Efficacy of insecticides against larval population of Helicoverpa armigera (Hubner) in field pea piscum salivum L. J.Experiment.Zool., 3(1), 109-114.Barauh, A.A.L.H., Deka S.C. andamp; Barman, N. (2002). Efficacy of synthetic pyrethroids against pod borer, Helicoverpa armigera (Handuuml;bner) in pigeonpea. J. agric. Sci. Society of North East India, 15 (2), 141-145.Ambule, A.T., Radadia, G.G., Shinde, C.U., andamp;andnbsp; Patil, D. L.(2015).Relative efficacy of newer insecticides against Helicoverpa armigera (Hubner) in tomato under South Gujarat condition. Internat. J. Plant Protec., 8(2), 250-255.Khorasiya, S.G., Vyas, H.J., Jethva, D.M., andamp; Joshi, P.H. (2014). Field efficacy of Helicoverpa armigera (Handuuml;bner) hardwick on pigeonpea. Internat. J. Plant Protec., 7(2), 325-329.Package and Practices adopted by Directorate of Plant Protection Quarantine andamp;Storage, Faridabad, ICAR and State Agricultural Universities.