The efficacy of entomopathogenic fungi [Beavueria bassiana (Bb08, Bb10) and Isaria fumosorosea (Ifr)] isolated from different regions of Southern Tamil Nadu, India was assessed against red cotton stainer, Dysdercus cingulatus. All the tested isolates showed 100% mortality. The B. bassiana isolates such as Bb08, Bb10 and an I. fumosorosea isolates exemplified the significant mortality among the isolates tested. LC50, LC90 and correlation coefficient were calculated for mortality. Bb08, Bb10 and Ifr isolates unveiled the lowest LC50 (5.9 x 105 , 6.6 x 105 and 2.6 x 105) and LC90 (1 x 109 , 7.3 x 108 and 3.9 x 108) value compared to the isolates tested. Highly significant correlation coefficient was observed in the isolates Bb08, Bb10 and Ifr