Efficacy of Various Bacillius thuringiensis Berliner Formulations against Greater Wax Moth Galleria mellonella L. Infesting Honeybee Combs

Efficacy of three Bacillus thuringiensis Berliner viz. Bioasp, Biolep (B. thuringiensis var. kurstaki) and Turex (B. thuringiensis var. aizawai) at 2.00, 2.50, 3.00 and 5.00g/L doses were tested in laboratory against Galleria mellonella L. by comb piece dipping method. Results revealed that LC?? of Bioasp, Biolep and Turex for second and third instar larvae was 2.13 and 2.51, 2.45 and 2.81, 2.23 and 3.46g/L, respectively. By all the three formulations, time taken to kill 50 per cent population of the two instars was more at lower doses as compared to higher. Further, time required to kill 50 per cent population of third instar larvae was more as compared to second instar.