Management of shoot weevil (Alcidodes affaber A.) in Bt cotton

Field experiment on management of shoot weevil in Bt cotton was undertaken during 2013–14 and 2014–15 kharif seasons at Agricultural Research Station, Dharwad Farm. Results revealed that profenophos 50 EC+diclorvos 76 EC (2.0 ml+0.5 ml) was found to be superior over rest of the treatments by recording least number of adults (3.45 and 3.15/plot during 2013–14 and 2014–15, respectively) and followed by okra as a trap crop (3.50 and 3.33/plot during 2013–14 and 2014–15, respectively). Similarly, profenophos 50 EC+diclorvos 76 EC (2.0 ml+0.5 ml) recorded lowest grub infestation of 13.18 and 4.21% during 2013–14 and 2014–15, respectively, followed by okra as a trap crop (15.93 and 4.30% during 2013–14 and 2014–15, respectively). Profenophos 50 EC + diclorvos 76 EC (2.0 ml+0.5 ml) recorded least number of grubs per plant during the consecutive years (3.75 and 1.95 grubs per plant, respectively) followed by okra as a trap crop (4.11 and 4.00 grubs per plant, respectively). Similarly, profenophos 50 EC+diclorvos 76 EC (2.0 ml+0.5 ml) recorded lowest number of broken branches during both the years (4.00 and 3.05 branches, respectively). Treatment profenophos 50 EC+diclorvos 76 EC (2.0 ml+0.5 ml) was found superior by recording highest seed cotton yield (18.26 and 16.60 q/ha) and B: C (1.90 and 1.60) during the consecutive years.