The pathogens Xanthomonas sp. and Pseudomonas sp. are bacteria that cause diseases known as bacteriosis in a wide variety of plants. These bacteria are found in soil, water and on the surface of plants. They begin their infectious cycle by entering the plant through wounds, stomata or hydathodes. Once inside, they multiply in the intercellular space and produce enzymes that break down cell walls, causing necrosis and other damage to plant tissues. These bacteria can survive on plant debris, contaminated seeds and in soil, facilitating reinfection in the following growing season. Dispersion occurs through irrigation water, rain splash, wind, insects and contaminated tools. In addition, certain species can form biofilms that protect them from adverse conditions and phytosanitary treatments.