Sensitivity of Fusarium moniliforme Isolates to Ipconazole

Tateishi, Hideaki; Chida, Tsuneaki

doi:10.1007/pl00012977

Cited by 20 publications

(13 citation statements)

References 4 publications

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“…5) This result was reconfirmed with Ff complex group A (isolates randomly chosen from the previous study), although the shoulder peak at 3.13 mg/L was ambiguous in this study. MIC values of the Ff complex isolates, which were obtained after 1994 (group B), ranged from 0.2 to 6.25 mg/L and this range was within the range of previous study.…”

Section: Discussionsupporting

confidence: 78%

“…It could be important for sustainable efficacy that the whole range of sensitivity in virulent F. fujikuroi isolates is covered with the practical dosage of ipconazole with a sufficient deposit in the treated seeds. Twenty years ago, it was suggested that the resistant development was not likely to occur because of the sufficient margins between the range of MIC values and the deposit of ipconazole in the treated seeds, 5) and then our results in this study indicate that the suggestion seems to be correct.…”

Section: Discussionsupporting

confidence: 58%

“…In 50 isolates of group A, which were obtained as F. moniliforme before 1994, 5) 45 and 4 isolates were identified as F. fujikuroi and F. proliferatum (OKY 91-6, KGW 1, GIF 89-2, EHM 92-2), respectively. The other 1 isolate (NGN 92-1) was unidentified by this PCR-RFLP.…”

Section: Species Identification Of the Ff Complex Isolatesmentioning

confidence: 99%

“…5) In this paper sensitivity to ipconazole, species identification and gibberellin production in Ff complex from rice in Japan before (group A) and after (group B) the launching ipconazole were compared. In addition, efficacy of ipconazole against rice "Bakanae" disease was evaluated by using gibberellin-producing F. fujikuroi isolates in group B.…”

Section: Introductionmentioning

confidence: 99%

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Species composition, gibberellin production and sensitivity to ipconazole of the <i>Fusarium fujikuroi</i> species complex isolates obtained before and after its launch

Tateishi

Suga

2015

J. Pestic. Sci.

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Sensitivities to ipconazole of 50 isolates of the Fusarium (Gibberella) fujikuroi species complex (Ff complex) obtained from rice in Japan before 1994 (group A: before the launch of ipconazole) and 65 isolates after 1994 (group B) were investigated. Most isolates were identified as Fusarium fujikuroi, while 5 isolates in group A and 4 isolates in group B were identified as Fusarium proliferatum with species diagnostic PCR-RFLPs. The minimum inhibitory concentration (MIC) range, profiles in sensitivity to ipconazole and gibberellin production were similar in both groups. Gibberellin production was detected in the F. fujikuroi isolates with higher sensitivity to ipconazole but not in the isolates with lower sensitivity and F. proliferatum. High efficacy of ipconazole against rice "Bakanae" disease was confirmed by using the gibberellin-producing F. fujikuroi isolates in group B. No shift in sensitivity to ipconazole was verified and this may contribute to the stable efficacy against rice "Bakanae" disease.

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Section: Discussionsupporting

confidence: 78%

Section: Discussionsupporting

confidence: 58%

Section: Species Identification Of the Ff Complex Isolatesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Species composition, gibberellin production and sensitivity to ipconazole of the <i>Fusarium fujikuroi</i> species complex isolates obtained before and after its launch

Tateishi

Suga

2015

J. Pestic. Sci.

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“…33,34) The sensitivity of Gibberella fujikuroi, the causal fungus of rice "Bakanae" disease, to ipconazole was investigated previously, and the MIC values of 211 isolates collected from various prefectures of Japan ranged from 0.10 to 6.25 mg/l, with a peak at 0.39 mg/l. 34) Good efficacy against "Bakanae" disease caused by isolates with different MIC values was obtained by seed treatment with ipconazole. Although 15 years have passed since the commercial use of ipconazole began, no resistance to ipconazole is known to have occurred.…”

Section: Discussionmentioning

confidence: 99%

Sensitivity of Japanese Fusarium graminearum species complex isolates to metconazole

et al. 2010

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The sensitivity of the Fusarium graminearum species complex, the causal fungus of Fusarium head blight, to metconazole was measured. The minimum inhibitory concentrations (MIC) of 101 isolates ranged from 0.20 to 6.25 mg/l with a single peak at 1.56 mg/l. The effective concentration for 50% growth inhibition (EC 50 ) was Ͻ0.1 mg/l in about 80% of isolates, and no isolate was significantly less sensitive to metconazole among this group. Among the F. graminearum species complex, F. asiaticum and F. graminearum s. str. were identified by PCR-RFLP. The trichothecene chemotypes were determined as 3ADON, 15ADON, or NIV by multiplex PCR. Although species-specific geographical distributions and mycotoxin production characteristics were found, the MIC values to metconazole of both species were distributed within a similar range, and no significant difference in sensitivity was observed between the species or trichothecene chemotypes. Next, CYP51 genes from isolates with different sensitivities to metconazole were amplified by PCR, and their sequences were compared. As a result, it was suggested that the differences in sensitivity to metconazole between the isolates were not due to the substitution of amino acids in CYP51, the target enzyme of DMI. Then, macrospores from isolates with various sensitivities to metconazole were sprayed onto wheat ears, and the efficacy of metconazole was examined. Metconazole showed high control activity against every isolate.

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Sterol Biosynthesis Inhibitors

Kuck¹,

Vors²

2007

Modern Crop Protection Compounds

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Sensitivity of Fusarium moniliforme Isolates to Ipconazole

Cited by 20 publications

References 4 publications

Species composition, gibberellin production and sensitivity to ipconazole of the <i>Fusarium fujikuroi</i> species complex isolates obtained before and after its launch

Species composition, gibberellin production and sensitivity to ipconazole of the <i>Fusarium fujikuroi</i> species complex isolates obtained before and after its launch

Sensitivity of Japanese Fusarium graminearum species complex isolates to metconazole

Sterol Biosynthesis Inhibitors

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