Sf. Vaughn et Gf. Spencer, ANTIFUNGAL ACTIVITY OF NATURAL COMPOUNDS AGAINST THIABENDAZOLE-RESISTANT FUSARIUM-SAMBUCINUM STRAINS, Journal of agricultural and food chemistry, 42(1), 1994, pp. 200-203
Several natural compounds that had been previously identified as effec
tive potato sprout inhibitors were examined for antifungal activity ag
ainst three thiabendazole (TBZ)-resistant strains and a TBZ-sensitive
(wild-type) strain of Fusarium sambucinum. Salicylaldehyde was the mos
t inhibitory compound of those tested when applied as a volatile and c
ompletely inhibited fungal growth at headspace gas levels of 20 mu g/m
L or lower. Cinnamaldehyde, salicylaldehyde, and thymol prevented all
growth when incorporated in media at 0.1% (v/v) levels. TBZ-resistant
strains were only partially inhibited by TBZ concentrations that compl
etely inhibited the wild-type strain. Treatment of tubers with compoun
ds after wounding and inoculation with fungal spores was generally ine
ffective in suppressing dry rot, possibly due to lack of direct contac
t between the fungi and the compounds,