Kwang-Yun Cho

Inhibitory Effect of Flusilazole on the Spore Formation of Aspergillus niger Causing the Onion Black Mold in Vapour Phase

In 1998, a pathogen isolated from infected onions was identified as Aspergillus niger. At 3, A. niger AnYD-1 showed the best mycelial growth, spore germination, and high pathogenicity to onions. In spite of the weak inhibitory effect of flusilazole and hexaconazole on the mycelial growth on PDA, they showed the specific inhibitory activity against the formation of spores in the vapour phase. With flusilazole and hexaconazole, the effects of the solvent, the applied concentration and the incubating temperature on the activities inhibiting the spore formation were confirmed. Their inhibitory effect on the spore formation in vapour phase was excellent by solving them with dimethylsulfoxide and dimethylformamide among tested solvents, and applying them at high temperature such as 30~35.