In the present study, Methanol extract of Argemone mexicana (satyanashi) and Calotropis procera (aak) were tested for antifeedant Indices against Helicoverpa armigera (Hübner) in gram field of Pali region of Rajasthan. Antifeedent index increased as methanol extract content increased. When 8% is used of Calotropis procera (aak), AFI was higher (77 %) while at 8 % concentration of Argemone mexicana (satyanashi), In comparison to the control group, the H. armigera larvae in their third instar had an AFI of 53%. Aak leaves consistently demonstrated a stronger antifeedant effect than Satyanashi leaves.