Evaluation of Various Aqua Suspension Formulations of Beauveria bassiana (Balsamo) Vuillemin against Helicoverpa armigera

Studies on laboratory evaluation of nine aqua suspension formulations of entomopathogenic fungus, Beauveria bassiana (Balsamo) Vuillemin comprising adjuvants viz. 1) B.b.+GLY+CMC, 2) B.b.+GLY+HO, 3) B.b.+SFO+CMC 4) B.b.+SFO+HO 5) B.b.+GLY+BA, 6) B.b.+GLY+BA+TW, 7) B.b.+SFO, 8) B.b.+GNO and 9) Control (B.b. alone) were carried out against the II and III instar larvae of H.armigera. The data on larval mortality was recorded at 5, 7 and 10 days after treatment (DAT). At 10 DAT all the formulations were significantly superior to control (B.b. alone) for the lethal effect. The formulation B.b.+ SFO + CMC registered significantly highest larval mortality of 90.00 and 83.33 per cent of II and III instar larvae of H.armigera, respectively. However, it was at par to the formulation B.b.+ GLY + HO recording 86.67 and 80.00 per cent mortality of II and III instar larvae of H.armigera, respectively. The control (B. b. alone) recorded lowest (63.33 and 53.33 %) mortality of the caterpillar.