Profenophos Resistance in Brinjal Shoot and Fruit Borer Leucinodes orbonalis Guenee Siddhartha K1, Ragumoorthi K N1,*, Krishnamoorthy S V1, Saraswathi T2, Balasubramani V3, Vinothkumar B1 1Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore641003, Tamil Nadu, India 2Department of Medicinal and Aromatic Crops, Tamil Nadu Agricultural University, Coimbatore641003, Tamil Nadu, India 3Controller of Examinations, Tamil Nadu Agricultural University, Coimbatore641003, Tamil Nadu, India *Email: ragumoorthik@tnau.ac.in (corresponding author): ORCID ID 0000-0003-1589-1099
Online Published on 31 August, 2024. Abstract The present experiment was carried out in Tamil Nadu to investigate the level of profenophos resistance in Leucinodes orbonalis Guenee populations from different locations. The median lethal concentration (LC50) values was observed to vary from 54.72 to 287.83 ppm, with Dharmapuri and Theni exhibiting moderate resistance (LC50 of 287.83 and 251.65 ppm, respectively), while Villupuram and Thiruvannamalai remained susceptible (LC50 of 64.95 and 54.72 ppm, respectively). Resistance ratios, calculated against a susceptible population, varied across regions as Dharmapuri (11.61 fold), Theni (10.15 fold), Salem (6.99 fold), Coimbatore (6.26 fold), Tiruchirapalli (5.72 fold), Madurai (5.66 fold), Namakkal (5.37 fold), Dindigul (3.46 fold), Villupuram (2.62 fold) and Thiruvannamalai (2.21 fold). These findings highlight that populations of L. orbonalis developed low to moderate levels of resistance to profenophos and there is an urgency of implementing IPM strategies to curb the resistance. Top Keywords Insecticide resistance, Leucinodes orbonalis, Profenophos, Field populations, Tamil Nadu, Lethal concentration, Resistance ratio, Geographical locations, Susceptible lab population, Level of resistance, IPM. Top |