Sensitivity to fungicides in the isolates of Phytophthora infestans (Mont.) de Bary in the Czech Republic from 2003 to 2008
| Autor: | J. Mazáková, V. Táborský, E. Hausvater, Miloslav Zouhar, Pavel Ryšánek, P. Doležal |
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| Rok vydání: | 2011 |
| Předmět: |
0106 biological sciences
0301 basic medicine Veterinary medicine biology Soil Science biology.organism_classification 01 natural sciences Fungicide 03 medical and health sciences chemistry.chemical_compound 030104 developmental biology chemistry Phytophthora infestans Botany Propamocarb Agronomy and Crop Science Metalaxyl Mycelium 010606 plant biology & botany |
| Zdroj: | Plant Protection Science. 47:5-12 |
| ISSN: | 1805-9341 1212-2580 |
| DOI: | 10.17221/16/2010-pps |
| Popis: | Mazakova J., Zouhar M., Rysanek P., Taborský V., Hausvater E., Doležal P. ( 2011): Sensitivity to fungicides in the isolates of Phytophthora infestans (Mont.) de Bary in the Czech Republic from 2003 to 2008. Plant Protect. Sci., 47: 5–12. 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. Resistant isolates were found only in two of the sample years (2003 and 2008); they represented 58% of the samples in 2003 and only 29% in 2008. Four isolates from 2004 were found to be intermediate for their level of resistance. 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. |
| Databáze: | OpenAIRE |
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