“…The three species of Pythium recovered from cannabis plants in this study have a wide host range, including many horticultural and field crops worldwide, e.g. beans, cilantro, opium, spinach, strawberry, soybean and tobacco (McCarter & Littrell, 1970;Watanabe, 1977;Kageyama & Ui, 1983;Bates & Stanghellini, 1984;Alam et al, 1996;Fortnum et al, 2000;Watanabe & Tojo, 2006;Corrêa et al, 2011;Romero et al, 2012;Tomioka et al, 2013;Rojas et al, 2017). Pythium root rot is also destructive on various crops grown in hydroponic systems, including lettuce, cucumber, tomato, sweet pepper and roses (Stanghellini & Kronland, 1986;Sutton et al, 2006).…”