However, most of research was done with grasses in temperate region. Our finding show for the first time in cultivated annual crops i.e chili that endophytic fungi is able to suppress the growth, development and population growth of A. gossypii. One isolate SH2, beside prolonged life cycle, also decreased fecundity, therefore had strongest effect on decreasing population growth of A. gossypii. Other tested endophytic fungi (SH1, SH2 and Nigrospora sp.) decreased fecundity but had no effect on life cycle. The other important point was some endophytic fungi i.e. Nigrospora sp. and SH2, suppressed the body length of aphids (Table 6). The reduction of body size of aphids due to endophyte treatment was alo reported on aphid Rhopalosiphum padi on rygrass inoculated by endophyte