The use of microbial metabolites against post-harvest diseases of longan fruit

Summary  The effect of different concentrations of polyoxin and culture supernatant of Bacillus subtilis was tested against rot fungi on longan cv. Shixia fruit. Both have good control of rot caused by Botryodiplodia . Control of the fungus was better at the higher concentrations of the two treatments. Control of fruit decay, treated with the culture supernatant of Bacillus subtilis, polyoxin, or a combination of both, was good up to 30 days at 5 C after treatment, but markedly decreased when fruit was stored for a longer time. The combination was better than either treatment alone, and resulted in 96.3% good fruit in cold storage after 30 days compared with only 66.3% for the control.