Application of trichoderma asperellum in promoting growth of bitter gourds and improving disease resistance of bitter gourds

The invention relates to trichoderma and application thereof. The trichoderma is a trichoderma asperellum strain, the strain number is T-A158, and the preservation number is CCTCC NO.M2018620. The optimum culture medium of the trichoderma asperellum T-A158 strain is a PDA culture medium taking sucrose as a carbon source. The trichoderma asperellum TA158 strain disclosed by the invention has the beneficial characteristics of fixing nitrogen, secreting IAA and siderophore and the like. The trichoderma asperellum T-A158 strain can promote the growth of bitter gourds, can improve the activity of peroxidase (POD), polyphenol oxidase (PPO) and other enzymes in bitter gourd plants, improves the content of soluble sugar in the bitter gourd plants, reduces the content of H2O2, induces the bitter gourd plants to generate disease resistance and improves the control effect of the bitter gourds on wilt. The control effect reaches 90.41% on the ninth day of inoculation of pathogenic bacteria F.oxysporum. The trichoderma as