Management of pod fly, Melanagromyza Obtusa in a bushy lac host, Flemingia Semialata for quality seed production Jaiswal A. K.*, Singh A. K., Singh J. P.1, Patamajhi P. Transfer of Technology Division, ICAR-Indian Institute of Natural Resins and Gums, Ranchi-834 010 1Present Address: Division of Entomology, ICAR-Indian Agricultural Research Institute, New Delhi, 110 012 *Email: jaiswalak59@gmail.com
Online published on 3 November, 2015. Abstract Focus of pest management research in lac production system has been on predators and parasites of lac insect, however increasing incidence of pod fly (Melanagromyza obtusa) in Flemingia semialata hinders seed production and require more attention on its management. Field evaluation of ten insecticides was carried out to find out their relative performance against this fly for seed protection in F. semialata at research farm of ICAR-Indian Institute of Natural Resins and Gums, Ranchi for two consecutive seasons under rainfed conditions. Per cent pod damage and % loss in number of viable seeds were estimated to be 96.8 and 89.6, respectively in unprotected crop. Emamectin benzoate 0.0025%, though, recorded lower pod damage, could not yield higher number of viable seeds. Among the treatments, the best options for pod fly management having respective values of total pod damage % and number of viable seeds per 100 pods, emerged as: lambdacyhalothrin 0.0025% with 63.8 and 67.2, thiacloprid 0.0434% with 70.4 and 139.2, spinosad 0.0075% with 70.8 and 92.2, chlorantraniliprole 0.0093% with values of 74.4 and 122.2, and fipronil 0.0100% with 77.2 and 103.2. Hence, four applications of any one of the five insecticides evaluated starting with the opening of inflorescence at an interval of 15 days will be the best schedule of insecticides for pod fly management in F. semialata. Top Keywords Pod fly, Flemingia semialata, seed production, insecticide, emamectin benzoate, lambdacyhalothrin, pod damage, viable seeds. Top |