Management of whitefly Bemisia tabaci (genn.) on potato with azadirachtin and insecticide combinations Kumar Jatin1, Bhatnagar Anuj*, Kumar Ajay1, Singh D.V.2 Central Potato Research Institute Campus, Modipuram, Meerut-250110 1Department of Plant Protection, CCS University, Meerut 2Department of Entomology, S. V. P. University of Agri.& Tech., Meerut-250110 *Email: dr.anujbhatnagar@gmail.com
Online published on 27 July, 2018. Abstract Field trials were conducted on potato (variety Kufri Pukhraj) to evaluate azadirachtin, and its combinations with thiamethoxam, imidacloprid, spinosad, and triazophos against Bemisia tabaci at the Central Potato Research Institute Campus Modipuram, Meerut during 2012–13 and 2013–14. The pooled data revealed that neonicotinoids alone and in combination with azadirachtin showed higher efficacy against whitefly in reducing population. Cumulative mean efficacy after third insecticidal spray indicated that thiamethoxam (57.9%) and imidacloprid (55.5%) were highly effective followed by triazophos (54.6%). Combination treatments with azadirachtin showed moderate efficacy and azadirachtin alone was the least effective, followed by spinosad. The highest yield (19.12 t/ha) was obtained with thiamethoxam and it was at par with imidacloprid (18.33 t/ha) and triazophos (18.22 t/ha). Imidacloprid was found to be the most effective and stood second highest among all the treatments with maximum C: B ratio 1: 6.29. Top Keywords Potato, whitefly, azadirachtin, combinations, thiamethoxam, imidachloprid, spinosad, triazophos, tuber yield, cost benefit. Top |