Occurrence of metalaxyl-resistant ttrains of Phytophthora infestans in Dutch potato fields

Davidse, L.C.; Looijen, D.; Turkensteen, L.J.; Wal, D. van der

doi:10.1007/bf01976658

Cited by 164 publications

(77 citation statements)

References 2 publications

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“…Resistance was first recorded in P. infestans in Ireland and The Netherlands in 1980 (Davidse et al, 1981;Dowley and O'Sullivan, 1981). Resistance has appeared in other oomycetes as well (Erwin and Ribeiro, 1996;Geogopoulos and Grigoriu, 1981;Schwinn and Urech, 1986).…”

Section: Academic Pressmentioning

confidence: 96%

Genetics of Metalaxyl Resistance inPhytophthora infestans

Lee

Mizubuti

Fry

1999

Fungal Genetics and Biology

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Section: Academic Pressmentioning

confidence: 96%

Genetics of Metalaxyl Resistance inPhytophthora infestans

Lee

Mizubuti

Fry

1999

Fungal Genetics and Biology

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“…Published research results in other parts of the world have shown evidence of changes in the population of P. infestans with the emergence of more virulent and metalaxyl-resistant strains (Davidse et al 1981;Dowley and O' Sullivan 1981;Fry and Goodwin 1997;Fry et al 1993). In Kenya, there is no evidence for the presence of new lineages or genotypes of the pathogen, and the P. infestans population consists of US-1 genotype, A1 mating type Vega-Sanchez et al 2000).…”

Section: Introductionmentioning

confidence: 99%

Efficacy of fungicide mixtures for the management of Phytophthora infestans (US-1) on potato

Muchiri

Narla

Olanya

et al. 2010

phyto

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Fungicide application strategies (timing, frequency, rates and mixtures) are important for the control and resistance management of potato late blight caused by Phytophthora infestans. The efficacy of fungicide mixtures consisting of fenamidone + mancozeb and propamocarb HCL + mancozeb at various rates and in spray regimes containing metalaxyl and mancozeb was evaluated for late blight control (US-1) at four locations in Kenya. Propamocarb HCL + mancozeb significantly (P < 0.05) reduced foliar blight compared with mancozeb and the untreated control under moderate to severe disease pressure. Disease severity was significantly lower following application of propamocarb HCL + mancozeb at a rate of 4L ha-1 than at rates of 2L and 3L ha-1 in 1999 and 2000, but it was not significantly lower following applications at a rate of 3L ha-1 in 2000 and 2001. There were no significant differences in mean final late blight score among the three rates of 0.9, 1.0 and 1.1 kg ha-1 of fenamidone + mancozeb. All fungicide mixtures and application sequences significantly reduced the area under the disease progress curve and final late blight scores as compared with the unprotected control. Total and marketable tuber yield significantly (P < 0.05) increased in all fungicide-treated plots.

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“…Selection pressures result in an increased frequency of resistant strains (Gisi 2002). The occurrence of resistant isolates of P. infestans was first observed in potato crops grown in Ireland and in the Netherlands where metalaxyl was used as a single ingredient product that was applied curatively and during high disease pressure (Davidse et al 1981;Dowley & O'Sullivan 1981). Reports of resistant isolates appeared together with discovery of the A2 mating type of P. infestans in Europe (Hohl & Iselin 1984).…”

mentioning

confidence: 99%

Sensitivity to fungicides in the isolates of Phytophthora infestans (Mont.) de Bary in the Czech Republic from 2003 to 2008

Mazáková¹,

Zouhar²,

Ryšánek³

et al. 2011

Plant Prot. Sci.

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Mazáková J., Zouhar M., Ryšánek P., Táborský V., Hausvater E., Doležal P. In the growing seasons from 2003 to 2008, 547 isolates of Phytophthora infestans from five regions in the Czech Republic were collected and examined for their sensitivity to the active ingredients (metalaxyl, dimethomorph and propamocarb-HCl) of frequently used fungicides. The response of the isolates to each of these substances was examined using the in vitro amended-agar method; in 352 of these isolates, the sensitivity to metalaxyl was also assessed by the floating leaf-disc assay. The majority of the isolates were sensitive (89.8%) to metalaxyl. All the isolates that were tested were sensitive to dimethomorph and propamocarb-HCl; these particular substances completely suppressed mycelial growth at 1 µg a.i. per ml.

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Occurrence of metalaxyl-resistant ttrains of Phytophthora infestans in Dutch potato fields

Cited by 164 publications

References 2 publications

Genetics of Metalaxyl Resistance inPhytophthora infestans

Genetics of Metalaxyl Resistance inPhytophthora infestans

Efficacy of fungicide mixtures for the management of Phytophthora infestans (US-1) on potato

Sensitivity to fungicides in the isolates of Phytophthora infestans (Mont.) de Bary in the Czech Republic from 2003 to 2008

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