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Agricultura Técnica

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PATINO H, Luis Fernando; BUSTAMANTE R, Elkin  and  SALAZAR P, Lina María. Effect of Foliar Substrates on Black Sigatoka (Mycosphaerella fijiensis Morelet) in Banana (Musa paradisiaca L.) and Plantain (Musa acuminata Colla). Agric. Téc. [online]. 2007, vol.67, n.4, pp.437-445. ISSN 0365-2807.

The Black Sigatoka caused by the fungus Mycosphaerella fijiensis Morelet, is the most destructive foliar disease in the banana (Musa × paradisiaca L.) and plantain (Musa acuminata Colla) production around the world. Chemical fungicides are the main control tactics; however, fungicide resistance had increased control costs, besides environmental contamination and consumers demands for a fruit free of pesticide residues. The enhancement of populations of native bacteria through selective substrates, with lytic activity on M. fijiensis, looks as a management alternative. Application of two foliar substrates, that had a mineral solution plus urea, barley flour and colloidal chitin known to built-up biocontrol bacteria, allowed to decrease fungicide applications in from 43 to 46%, when sprayed in rotation with conventional fungicides.

Keywords : chitinolytic bacteria; glucanolytic bacteria; colloidal chitin; barley flour; biological control.

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