Bioefficacy and residue of endosulfan 50 WDG in mango.
Samanta A., Dhar M., Hembram T. K., Sandip Patra, Anjan Bhattacharyya
Author Affiliation: Department of Agricultural Chemicals, AICRP on Sub-Tropical Fruits, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur 741 252, India.
Environment and Ecology 27 : 1087-1089
Abstract : Studies were conducted in West Bengal, India, to evaluate the efficacy of endosulfan 50 WDG against mango hoppers (Amritodus atkinsoni, Idioscopus niveosparsus and Idioscopus clypealis) along with carbaryl and nimbicidine on mango cv. Himsagar under field conditions during 2004-05. Endosulfan at 0.07% (single dose) and 0.14% (double dose), carbaryl at 0.15% and nimbicidine (0.2%) were applied. In total, there are five treatments including the control. The insecticides were applied at fortnightly intervals starting from the panicle emergence. Considering the overall efficacy, endosulfan was found to be superior in controlling the hopper population over other insecticidal treatments with more than 80% avoidable yield loss. Dissipation of endosulfan was also studied in mango fruits. The residues declined to non-detectable levels on 60 day after last spray for both the treatment doses. The corresponding half-life was found to be 2.73 day for single dose and 2.95 day for double dose. The safe waiting periods (TMRL) determined for endosulfan was 14-20 days. Harvested fruits had no detectable level of residues.