請用此 Handle URI 來引用此文件: http://hdl.handle.net/11455/46236
標題: Nature of Resistance to Methyl Benzimidazole Carbamate Fungicides in Fusarium oxysporum f.sp lilii and F-oxysporum f.sp gladioli in Taiwan
作者: Chung, W.H.
黃振文
Chung, W.C.
Ting, P.F.
Ru, C.C.
Huang, H.C.
Huang, J.W.
鍾文鑫
關鍵字: Fusarium oxysporum f
sp
gladioli
F
oxysporum f
sp
lilii
beta-tubulin
benzimidazole
fungicide resistance
beta-tubulin gene
colletotrichum-acutatum
botrytis-cinerea
field
strains
sensitivity
mutations
anthracnose
phenotypes
binding
rot
期刊/報告no:: Journal of Phytopathology, Volume 157, Issue 11-12, Page(s) 742-747.
摘要: Fusarium oxysporum f.sp. gladioli and F. oxysporum f.sp. lilii cause corm rot and yellowing of gladiolus and lilies respectively. Resistance among isolates of these two pathogens to two benzimidazole (methyl benzimidazole carbamate: MBC) fungicides, benomyl and thiabendazole, has been identified. However, sensitivity to other benzimidazole fungicides among isolates of F. oxysporum f.sp. gladioli and F. oxysporum f.sp. lilii remains unclear. Sensitivity among isolates of these two pathogens to benomyl, thiophanate-methyl, carbendazim and thiabendazole were evaluated in this study. Results showed that among six F. oxysporum f.sp. gladioli isolates, one was highly resistant, four were moderately resistant and one was highly sensitive to benomyl, five were highly resistant to thiophanate-methyl, four were sensitive and one was highly sensitive to carbendazim and all six isolates were sensitive to thiabendazole. Among the 13 F. oxysporum f.sp. lilii isolates tested, three were moderately resistant and 10 were highly sensitive to benomyl, and five were highly resistant, three were moderately resistant and five were sensitive to thiophanate-methyl. While all isolates were highly sensitive or sensitive to carbendazim and thiabendazole. These results strongly suggest that the mode of fungicide resistance in these two pathogens varies among members of the benzimidazole fungicide group and that cross resistance does not always occur. Sequence analysis of the partially amplified beta-tubulin gene indicated that mutation in codons 198 and 200 had not occurred in the benzimidazole resistant isolates. It was concluded that resistance found in Taiwan isolates of F. oxysporum f.sp. gladioli and F. oxysporum f.sp. lilii to these fungicides may be due to some other mechanism.
URI: http://hdl.handle.net/11455/46236
ISSN: 0931-1785
文章連結: http://dx.doi.org/10.1111/j.1439-0434.2009.01545.x
顯示於類別:植物病理學系

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