ABSTRACT The production of several vegetable crops has depended on the use of methyl bromide soil fumigation to control a wide array of soil-borne pathogens, however this product was banned in 2005. This situation has led to an increase interest in the development of alternative strategies to control soil-borne pathogens. Among the non-chemical alternatives used to reduce the consumption of methyl bromide, biofumigation and solarization are outstanding. Biofumigation is an important biological control technique that uses the effect of volatile substances that are released during the decomposition of organic matter and in combination with the incorporation of vegetal debris in the soil improves the yield. In addition, crop residues can be eliminated decreasing their environmental impact. But the main problem with the incorporation of vegetal debris in the soil is the potential risk that these residues have as diseases source. Biofumigation was evaluated under controlled conditions for control of the pathogenic bacteria Clavibacter michiganensis and Ralstonia solanacearum. The experimental substrate (peat moss and sand mix) was artificially infested with the bacterial pathogen using fresh tomato debris. The effect of three different doses of artificially infected plant material (5, 10 and 15g) in 500g of substrate was tested during 6 weeks at 25 ºC (considered as biofumigation) and at 45 ºC (considered as biofumigation with solarization or biosolarization). Disease incidence had not decreased using biofumigation and biosolarization treatment controlled both bacteria. Because of this result, biofumigation with solarization shows potential to be used as a soil biofumigant technique for the management of phytopathogenic bacteria. In the second experiment, the survival of the pathogenic bacteria in either artificially infested substrate or in artificially infected tomato plants was studied to determine the behaviour of the pathogens under the experimental conditions. Strains of saprophytic bacteria in the genera Bacillus, Paenibacillus and Brevibacillus were identified and in vitro antagonism between Bacillus subtilis and C.m.michiganensis was observed. Finally, the effect of different treatments on Brussels sprouts debris was studied to control the ring spot disease caused by Mycosphaerella brassicicola. This research was carried out under field conditions in order to prevent the fungal dissemination. Treatments included the use of biological products that accelerates leaf decomposition and fungal antagonists. These biological treatments were compared with the effect of urea as chemical product. The sporulation of M. brassicicola and its amounts of DNA in samples of treated leaves was assessed. Results showed the application of urea as the best treatment against the sporulation of M. brassicicola in the treated lesions.