Isolation, identification, and pathogenic effects of Trichoderma spp. from Auricularia auricula

Auricularia auricula, one of the most important edible mushrooms, is affected heavily by Trichoderma. We collected diseased samples from main A. auricula cultivation regions to characterize pathogen and study effect Trichoderma spp. on species. identified species, T. pleuroticola, based internal transcribed spacer morphology characteristics, two types strains, Heiwei 15 (HW 15) Hei 29 (H 29), were tested in this work. The growth rate pleuroticola was 3.26–3.52 times higher than that advantageously competed for living space nutrients. In confrontation culture, completely inhibited mycelium grew it, resulting a diverse impact HW H 29. addition, can produce metabolites with antibacterial activity. inhibition volatile H-29 13.46% 10.44%, nonvolatile 36.04% 31.49%, respectively. Further analysis showed these antifungal activities inhibiting mainly attributed organic compounds nonanal, tyrosine, beta-sitosterol, wortmannin. short, highly pathogenic fungi production auricula. affect normal hypha, its also have inhibitory effects hypha.