USE OF MICROBIAL CONSORTIA FOR AN ECO-SUSTAINABLE MANAGEMENT OF SOME TOMATO DISEASES

The use of beneficial microbial population in agriculture has proven to be important for organic productions and enhances biodiversity in agro-ecosystems. This study was aimed to evaluate the beneficial effects of commercial microbial consortia (Micosat F®) on the growth and productivity of tomato plants and, in particular, the ability of such consortia to elicit an endogenous protection against the bacterial spot, (Xanthomonas vesicatoria), and the root and crown rot (Rhizoctonia solani). Experiments were conducted under field conditions on tomato for industrial processing during two seasons, following a randomised plot design and in duplicate for a statistical evaluation of data. Micosat F® was applied 5 times fortnightly, from first fruit set to three weeks before harvest. Phytopathometrical assessments were done on plants during the whole season and the tomato production was also assessed. Results highlighted that Micosat F® consistently enhanced plant size by an average increase of 13.04%. In case on plots inoculated with R. solani, the use of Micosat F® led to an increase of tomato production by 18.3%, when compared with the untreated controls. In case of plots inoculated with X. vesicatoria, no significant difference was seen between treated and untreated plants, as regards the harvested fruits. The induction of a protective status in tomato plants, elicited by the use of Micosat F®, was evaluated by measuring the increased activity of antioxidant enzymes (CAT, POD, SOD). Preliminary data are very promising and are indicating that microbial consortia, such as those contained in Micosat F®, might have a significant role in both the biological and integrated tomato production.