-

In this study, a plant activator (Actigard 50 WG; Acibenzolar-S-methyl; ASM) and an isolate of Fusarium oxysporum formae speciales nonpathogenic on eggplant (F. oxysporum f. sp. melonis; FOM) which were found successful against Fusarium wilt disease (Fusarium oxysporum f. sp. melongenae; Fomg) in previous pot experiments, were examined in polytunnel conditions. Pathogen (Fomg10) was applied 72 h after ASM and FOM treatments to allow resistance development. Average lengths of ASM and FOM-treated plants were 88.8 and 78.7 cm, respectively, while control plant lengths were 53.56 cm, at 67th day after inoculation (DAI). Fomg10 was isolated from 25th cm of ASM and FOM induced plants and from 50th cm of control plants to evaluate disease progress. The disease improved rapidly in control plants by the end of experiment (67 DAI), and disease severity was 81%. Although neither of inducers succeeded to inhibit initial penetration of the pathogen, however, induced a certain amount of resistance by reducing the disease severity in eggplants by 37.65% (ASM) and 50.61% (FOM) at 67th DAI, compared to control