A dual-probe one-pot RPA-CRISPR/Cas12a: a highly sensitive and rapid method for detection of Phytophthora vignae.

BACKGROUND Phytophthora vignae is the primary pathogen affecting cowpea plants. Early on-site and accurate detection of the causal pathogen is critical for successful management. Therefore, it is both essential and urgent to create a rapid, sensitive, and accurate detection for P. vignae in cowpeas. RESULTS In this study, the one-pot RPA-CRISPR/Cas12a assay demonstrated the ability to effectively differentiate closely related oomycete species, exhibiting excellent specificity. The entire detection process can be completed within 15-20 min, with results being visually determined using a lateral flow strip (LFS) or by fluorescence detection under blue or ultraviolet (UV) light. Additionally, we have added dual probes to the one-pot RPA-CRISPR/Cas12a assay detection system, this modification improved reaction efficiency and significantly enhanced sensitivity (200 fg μL-1). CONCLUSION This study developed a dual-probe one-pot RPA-CRISPR/Cas12a detection platform that demonstrates rapid and highly sensitive identification of P. vignae. The proposed technology enables field-deployable detection without requiring specialized technical expertise, representing a promising approach with substantial potential for practical applications. © 2025 Society of Chemical Industry.