Transition from conventional copper fungicides to copper nanoparticles for sustainable agriculture
摘要
Copper-based fungicides have long been essential in managing plant diseases due to their broad-spectrum activity and low resistance risk. However, conventional copper salts pose environmental challenges, including soil accumulation and toxicity to non-target organisms. Here, we review the emerging role of copper nanoparticles (Cu-NPs) synthesized via green and conventional methods, which exhibit enhanced antifungal efficacy at lower doses through multifaceted mechanisms involving ion release, reactive oxygen species generation, and physical disruption of pathogens. Comparative studies indicate that Cu-NPs can achieve comparable disease control using substantially lower copper inputs, often requiring nearly a fifth of the copper mass used in conventional formulation. Analyses further demonstrate that Cu-NPs can reduce environmental copper deposition and phytotoxicity while remaining cost-effective. The various Sustainable Development Goals (SDGs) could be greatly aided by these decreased environmental copper loads. Despite promising results, the environmental fate and ecotoxicology of Cu-NPs require further investigation to ensure safe application. Our findings suggest that Cu-NPs represent a viable advancement toward more efficient and sustainable crop protection strategies, balancing disease control with ecological considerations in modern agriculture.