In vitro evaluation for compatibility of additives with Beauveria bassiana (Balsamo) Vuillemin

An in vitro evaluation was conducted for compatibility of 12 commonly used additives at three different concentrations of (0.1, 0.5, and 1.00%) with Beauveria bassiana through poisoned food technique. The results were expressed as radial growth and growth inhibition of B. bassiana on an additive treated medium. All the additives showed an inhibition in mycelial growth of B. bassiana, either partially or completely depending on their concentrations. On overall basis, carboxylmethyl cellulose (CMC) showed the highest radial growth with a least growth inhibition of (77.16 mm and 8.03%, respectively), followed by Kaolite (69.07 mm and 17.65%, respectively) and silica gel (65.20 mm and 22.25%, respectively). These findings concluded that CMC could be used in formulations of B. bassiana with the highest spore load of 4.67 × 108 spore’s ml−1.