Induction of systemic resistance by certain biocontrol agents against fusarium wilt complex disease of tomato
T Sivakumar, K Sanjeevkumar, P Balabaskar
Tomato (Lycopersicon esculentum Mill) is one of the important vegetable crops in the world. Among the pathogens affecting tomato, Fusarium oxysporum f. sp. lycopersici is considered as the major pathogen. F. oxysporum f. sp. lycopersici along with M. incognita, causes more damage to tomato than either of the pathogen alone. Considering the illeffects of chemical fungicides an attempt was made to exploit the ISR induced by antagonists for the management of wilt complex of tomato. The reults revealed that the plants treated with combination of Pf + Bc + Pl and challenge inoculation with F.oxysporum f. sp. lycopersici and Pf + Bc + Pl and challenge inoculation with Fol + nematode showed induction of earlier and increased levels of defense enzymes viz., PO, PPO, PAL and Phenol content as well as PR Proteins viz., chitinase and β-1, 3 glucanase in both leaves and root tissues.