1Central Integrated Pest Management Centre, State Bio Control Laboratory, Agartala799003, Tripura, India
Department of Entomology, Assam Agricultural University, Jorhat785013, Assam, India
*Email: badalassam@gmail.com (corresponding author)
Efficiency of six light sources viz., light emitting diode (LED), solar LED, compact fluorescent lamp (CFL), mercury, ultraviolet (UV) and tungsten bulbs in trapping of adult Lepidiota mansueta Burmeister was evaluated in Majuli river island of Assam during 2015-17. Results revealed that the maximum number of beetles (781.2; sex ratio: 3.7:1) got trapped in solar LED light trap and it was found to be significantly superior over the other light sources. With CFL bulbs, the maximum number of beetles were trapped in 15-watt bulb (725.3; sex ratio: 4.1:1). In mercury and UV lamp it was 389.2 and 199.1 beetles with a male: female sex ratio of 4.4:1 and 4.4:1, respectively. Relatively less beetles were attracted to the light traps with tungsten and normal LED bulbs. Based on these observations, a modified battery-operated LED light trap was designed and its performance was compared with solar LED and 15-watt CFL bulb during 2017. The modified battery-operated light trap trapped 427.3- 469.3 beetles as compared to the ones with solar LED (641.0) and 15-watt CFL bulb (582.0).
White grubs, Coleoptera, Scarabaeid, Majuli river island, Light traps, Sex ratio, Solar LED, Light intensity, CFL bulbs, LED bulbs, UV bulbs, Modified battery operated LED light trap
