Soil solarization associated with organic matters provides an effective control of several soil-borne fungi, which are difficult to eliminate using other methods; in addition, this association shortens the treatment time. The aim of this study was to assess the control of Fusarium oxysporum f. sp. lycopersici Race 2 by combining the amendment of "bitter" cassava (Manihot utilisima) and "sweet" cassava (Manihot dulcis) leaves with soil solarization. A field experimental was carried out, 3Kg/m² of the two types of cassava leaves were separately amended. Six treatments were tested, (solarizated+ "bitter" cassava, solarizated+"sweet" cassava, soil solarizated, soil, "bitter"cassava and "sweet"cassava). Fungus control was assessed based on the survival resistance structures on semi-seletive Komada medium at 7, 14, 21 and 28 days after the beginning of the experiment. Soil temperature values were monitored by a DataLogger Type CR23X (Campbell Scientific), and quantity of CO2 and O2 was monitored by a gas analyzer equipment (Testo 325-1). In solarizated treatments, soil temperature and trapping of CO2 were higher than the control (soil) and treatments with organic material incorporated without solarization. The association of both "bitter" and "sweet" cassava amendment with soil solarization inatived the pathogen whereas the other treatments had no effect, allowing the survival of the fungus.
alternative control; accelerated fermentation; soilborne phytopathogenic fungus
