Plant pathogenic Pseudomonas species are a group of gram-negative bacteria known for their ability to cause devastating diseases in a wide range of plant species. This chapter provides an overview of the plant-pathogenic Pseudomonas species, including their classification, pathogenicity mechanisms, and the diseases they cause. Additionally, we discuss the detection, management, and future prospects for controlling these pathogens. Understanding the biology and behavior of plant pathogenic Pseudomonas species is crucial for developing effective strategies to mitigate their impact on agriculture and ensure global food security.