Benzimidazole-Resistant Mutant Derived from a Single Ascospore Culture of Botryotinia fuckeliana

Low-level benzimidazole resistance inBotrytis cinereain New Zealand

“…In contrast Sozzi & Gessler (1980) reported direct selection of high-level resistant strains, but they used the powerful mutagen N-methyl-N' nitro-N-nitrosoguanidine and it is quite plausible that the strains recovered carried 2 mutations. These results differ from those of Polach & Molin (1975) who found rates of spontaneous mutation to highlevel benzimidazole resistance of 2/10 8 conidia.…”

Phenotypic Differences Between Natural and Induced Variants of Botrytis cinerea

“…This was surprising because they occur in natural populations (see above ;Bollen & Scholten, 1971;Jarvis & Hargreaves, 1973;Miller & Fletcher, 1974) and as spontaneous mutants in the laboratory (Polach & Molin, 1975). Thus, at least some strains of B. cinerea must carry appropriate genetic material that is amenable to mutation.…”

<i>Botrytis</i> tolerance to 6phenylalphapyrone and massoialactone

“…The mutation rate for 6-PAP and massoialactone tolerance was very high at approximately 6 x 10 -6 conidia for massoialactone and 2 x 10 -7 conidia for 6-PAP. This mutation rate occurred at a higher level than previously reported for high-level benzimidazole tolerance of 2 x 10 -8 conidia (Polach and Molin 1975). Therefore it may be concluded that field applications of 6-PAP or massoialactone may result in widespread tolerance of Botrytis isolates to these compounds as occurred with benzimidazoles (Geeson 1976(Geeson , 1978.…”