Fig. 1

Survival curves of Tuta absoluta 2nd and 3rd instar larvae following exposure to conidia of three isolates of Beauveria bassiana on tomato leaves. Isolates used here (LPP 139; LEF 140; LEF 141) were applied to tomato leaves at a concentration of 1 × 108 conidia mL−1. Survival was evaluated on a daily basis. Results were the means of three repetitions per isolate (error bars: SEM). Fifty insects were used per experiment and per isolate. Control leaves were treated with Tween 20 (0.01% v/v) only