| This paper tested the disinfection effect of chlorine dioxide渊ClO2冤on microconidia of banana fusarium
wilt pathogen Fusarium oxysporum f. sp. cubense (FOC009gfp strain) and banana soft rot bacteria Dickeya zeae in
aquatic and soil environments, to provide the basis for the prevention of spreading of banana fusarium wilt and
banana soft rot. The results showed that, 3 mg/L ClO2 could kill all microconidia of FOC009gfp in aquatic bioassay
system, but 20 mg/L ClO2 could not kill all the microconidia of FOC009gfp in soil bioassay system. Pouring around
the drawf banana root soil with higher than 800 mg/L ClO2 could kill soil fusarum efficiently, but only the
concentration higher than 1 500 mg/L ClO2 could kill all the fusarium in soil. ClO2 disinfection could increase the
amount of bacterium and fungi in soil significantly, but decrease the species of bacteria and fungi. 5 mg/L ClO2 could
kill all D. zeae in aquatic bioassay system. The results indicated that higher than 5 mg/L ClO2 could be used to
disinfect water and prevent the tested pathogen spreading from water, but disinfecting the soil infected by fusarium
wilt pathogen needed ClO2 concentraion of higher than 1 500 mg/L. |
