Abstract

RODRIGUEZ SANCHEZ, Janet; RIOS ROCAFULL, Yoania  and  BARO ROBAINA, Yamilé. Efectivity of strains Azotobacter sp. and Bacillus sp. for a control the fungi species associated with vegetable. cultrop [online]. 2016, vol.37, suppl.1, pp.13-19. ISSN 0258-5936.

The genus Azotobacter and Bacillus have a potential to atmospheric nitrogen fixation, mineral elements solubilization and producing a group of stimulator of vegetal growth substances. In addition, Bacillus is recognizing by its antagonistic activity. The reasons justify its selection with actives principles of biofertilizer products. The presence of fungus diseases in vegetable cultures is a problem for Cuban agriculture. The objective of the present work was to evaluate the antagonistic activity of Azotobacter and Bacillus strains against fungus that caused diseases in vegetables cultures. For those were employed Fusarium chlamydosporum, Corynespora casiicola and Cladosporium oxysporum. All strains belong at the INIFAT collections. For the development of work, “Dual Culture Bring” Method was used with permitting the selections those to possess previous activity and descript, in turn, principle affectations caused to fungi structures. Results emit that inside of two genus exist strains that inhibit the micelial growth. Among strains of Azotobacter, five result promissory against Cladosporium oxysporum, two respond to Fusarium chlamydosporum and only one was effective against Corynespora cassiicola. The activity shows for Bacillus genus is major. In this case, two strains show activity against Corynespora cassiicola, six against Cladosporium oxysporum and eight against Fusarium chlamydosporum. Highlight the finished that exists strains of Azotobactersp capable of inhibit more than one fungi species, which results very new for being quoted few times the genus activity against vegetable pathogens

Keywords : antagonistic bacterias; biological control; fungus diseases.

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