The effect of the combination of T. asperellum SC012 and hymexazol to control cowpea Fusarium wilt in fields. (A) The growth status of cowpea; (B) the symptoms of cowpea root; (C) the disease index of cowpea Fusarium wilt. (C1) and (C2) represent two field experiments conducted in June of 2020 and June of 2021, respectively. “Control”, “FO”, “T”, “H” and “T-H” stand for “blank control”, “negative control”, “Trichoderma treatment”, “hymexazol treatment” and “combination treatment”, respectively. Data presented are the means ± SE. Different letters indicate significant difference (p < 0.05) among the treatments.