Although not extremely common, the use of PCR to detect this disease is also another diagnostic tool. Specifically, PCR was studied for the detection of "Phytophthora fragariae" var. "rubi". It was found the use of PCR with conventional "Phytophthora" primers yields more favorable results, is less time consuming, and is more convenient than PCR using specific var. "rubi" primers. Also, using PCR with primers DC1 and DC5 in the second round was also found to yield favorable results to detect "Phytophthora fragariae" var. "rubi".