author(s)
Parmeshwar Gore, Jayalaxmi Ganguli and Rashmi Gauraha

abstract
Studies on the comparative feeding efficiency of the water hyacinth weevil, Neochetina bruchi and N. echhorniae were conducted under laboratory conditions in the Biocontrol laboratory, department of Entomology, College of Agriculture, IGKV, Raipur. Based on the number of scrapings made by water hyacinth weevils in 24 hours on the leaves of water hyacinth, data revealed that N. eichhorniae scrapped more as compared to N. bruchi. It was also observed that the scars were more on the upper surface of leaves than on lower surface. N. eichhorniae formed 16.34 and 8.32 scars, where as N. bruchi formed 8.2 and 2.91 scars on the upper and lower surface of leaves respectively. Number of scrapings made by male and female weevils in 24 hours also differed and results revealed that females scrapped more as compared to males in both the species.