Mentha longifolia is produced in and exported from Israel with annual revenue of US$16 million. In 2010, a severe epidemic of unknown etiology reduced growers' returns up to 50%. Disease symptoms included water-soaked lesions, necrosis, and web-like mycelia on plants. Two isolates (JV-1 and BS-1) from randomly selected symptomatic plants were identified as members of Rhizoctonia solani anastomosis groups. The authores state this is the first report of Rhizoctonia web blight in mint in Israel.
Nitzan N, Chaimovitsh D, Davidovitch-Rekanati R, Sharon M, Dudai N (2012) Rhizoctonia Web Blight—A New Disease on Mint in Israel. Plant Disease, Volume 96, Issue 3, Page 370-378, March 2012. http://dx.doi.org/10.1094/PDIS-04-11-0271