Rapid Diagnosis and Visual Detection of Potato Cyst Nematode (Globodera rostochiensis) Using Recombinase Polymerase Amplification Combination with Lateral Flow Assay Method (RPA-LFA)

Globodera rostochiensis is an important quarantine pest, it causes serious potato yield losses annually. Reliable and rapid molecular detection of G. rostochiensis is pivotal to effective early disease diagnosis and managements. Herein, recombinase polymerase amplification integrated with lateral flow assays method (RPA-LFA) was developed to target the internal transcribed spacer of nuclear ribosomal DNA (ITS rDNA) of the golden cyst nematode (G. rostochiensis), which allowed for the rapid diagnosis and detection of this nematode from crude extracts of cysts and juveniles within 30 min. Sensitivity test results showed that 10(-1) single juvenile and 10(-3) single cyst can be reliably detected. Moreover, the RPA-LFA method can directly diagnose and detect G. rostochiensis from infested field soil. This is the first RPA-LFA method for diagnosis G. rostochiensis, it is a fast, accurate, and sensitive detection method and can be developed for detection of G. rostochiensis in fields and laboratories lacking large instrument and equipment.