Articles
EFFICACY OF BACTERIAL ANTAGONISTS FROM USED ROCKWOOL SOILLESS SUBSTRATES AND DIFFERENT COMMERCIAL PRODUCTS AGAINST FUSARIUM WILT ON TOMATO
Article number
914_66
Pages
357 – 360
Language
English
Abstract
Seven different kinds of experimental trials were carried out to evaluate the efficacy of the bacterial strains (Pseudomonas putida FC6B, Pseudomonas sp.
FC7B, Pseudomonas putida FC8B, Pseudomonas sp.
FC9B and Pseudomonas sp.
FC24B) obtained from soilless used rockwool substrates and (Achromobacter xylosoxydans AM1 and Serratia sp.
DM1) obtained from suppressive soils against Fusarium wilt on tomato.
Along with these strains, two commercial bioproducts (Trichoderma harzianum T22 (RootShield); Pseudomonas chlororaphis MA342 (Cedomon) were also tested.
Different application strategies including soil treatment (trials I to VI; 107 and 108 CFU ml-1) and root dipping (trial VII; 108 and 109 CFU ml-1) were performed in a glasshouse in order to test the efficacy of the bacterial strains against Fusarium oxysporum f. sp. lycopersici (Panero6). Lowest disease incidence (DI 3.3) was recorded with a single application of P. putida FC6B at 108 CFU ml-1. Similar results were obtained with the same bacteria when the concentration was decreased to 107 CFU ml-1 but an increasing number of applications was required.
The highest plant biomass (50.3 g/plant) was recorded in the P. putida FC8B treatment (trial III). The present study showed the potential biocontrol activity of bacterial strains (FC6B, FC7B, FC8B, FC9B and FC24B) isolated from re-used rockwool soilless substrates against Fusarium wilt disease and the growth promoting activity of these strains on tomato plants.
FC7B, Pseudomonas putida FC8B, Pseudomonas sp.
FC9B and Pseudomonas sp.
FC24B) obtained from soilless used rockwool substrates and (Achromobacter xylosoxydans AM1 and Serratia sp.
DM1) obtained from suppressive soils against Fusarium wilt on tomato.
Along with these strains, two commercial bioproducts (Trichoderma harzianum T22 (RootShield); Pseudomonas chlororaphis MA342 (Cedomon) were also tested.
Different application strategies including soil treatment (trials I to VI; 107 and 108 CFU ml-1) and root dipping (trial VII; 108 and 109 CFU ml-1) were performed in a glasshouse in order to test the efficacy of the bacterial strains against Fusarium oxysporum f. sp. lycopersici (Panero6). Lowest disease incidence (DI 3.3) was recorded with a single application of P. putida FC6B at 108 CFU ml-1. Similar results were obtained with the same bacteria when the concentration was decreased to 107 CFU ml-1 but an increasing number of applications was required.
The highest plant biomass (50.3 g/plant) was recorded in the P. putida FC8B treatment (trial III). The present study showed the potential biocontrol activity of bacterial strains (FC6B, FC7B, FC8B, FC9B and FC24B) isolated from re-used rockwool soilless substrates against Fusarium wilt disease and the growth promoting activity of these strains on tomato plants.
Publication
Authors
G. Gilardi, K. Srinivasan, A. Garibaldi , M.L. Gullino
Keywords
biological control, suppressive soil, Fusarium oxysporum f. sp. lycopersici, Pseudomonas spp.
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