Effect of releases of T. chilonis, application of cypermethrin and their combination against brinjal shoot and fruit borer, Leucinodes orbonalis Guenée (Lepidoptera: Crambidae)

The field study during the summer season, 2013-14 was conducted for investigation on infestation of a devastating pest, brinjal shoot and fruit borer (BSFB), Leucinodes orbonalis Guenee, the data on the overall mean of healthy and infested shoots and percent shoot infestation indicated significant differences between various treatments. Highest mean number of healthy shoots recorded was in T. chilonis + cypermethrin treatment plots (112.23 shoots/plot), while in cypermethrin treated plots 109.3 shoots/plot were recorded, in T. chilonis 106.06 shoots/plot, whereas the minimum number of healthy shoots were recorded in untreated control (102.03 shoots/plot). The percent shoot infestation ranged from 8.65 to 16.95 percent in various treatments and differed significantly among different treatments. The healthy fruit ranged from 10.25 to 30.73 Kg per plot. The maximum number of healthy fruits was recorded in T. chilonis + cypermethrin treatment (30.73 Kg/plot), which was significantly higher in different compared to the treatments, followed by cypermethrin treatment (22.42 Kg/plot), T. chilonis (16.31 Kg/plot) and minimum number was recorded in the control (10.25 Kg/plot). Highest fruit infestation was recorded in the control (53.80%), which was significantly more over other treatments and minimum percent fruit infestation was recorded in T. chilonis + cypermethrin treatment (8.97%).