Chemical management of phytopathogenic bacteria: emerging compounds, molecular targets and outlook

Phytopathogenic bacteria are responsible for devastating agricultural losses globally. However, the chemical control of these pathogens is compromised by escalating resistance, environmental pollution, antibiotic resistance gene transfer, and a scarcity of validated antibacterial targets. To fill this gap, this review provides a critical and chemically-focused discussion of recent breakthroughs, aiming to bridge the gap between synthetic innovation, modern target discovery, and rational, data-driven design. Herein, we delineate emerging antibacterial compounds, emphasizing their structural diversity, structure-activity relationships, novel modes of action, and molecular targets. Furthermore, advanced methodologies for discovering and validating antibacterial targets are thoroughly examined, along with deep mechanistic insights. A forward-looking perspective on transformative approaches is also provided. This review aims to guide interdisciplinary efforts and stimulate the development of effective, sustainable, and environmentally friendly next-generation phytobactericides by offering the analysis urgently required by the field.