Six different feeding stimulants (FS) were evaluated in the laboratory at Akola for increasing the effectiveness of Helicoverpa armigera (Hiibner) nuclear polyhedrosis virus. Jaggery 0.5 per cent, sucrose 0.5 per cent, egg white 3 per cent and chickpea flour 1 per cent proved effective, reducing the LT50 from 175.25 h in virus alone to 103.37, 118.73, 125.97 and 128.29 h with FS, respectively.