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Biblioteca (s) : |
INIA Las Brujas. |
Fecha : |
19/11/2015 |
Actualizado : |
19/11/2015 |
Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
Autor : |
MONDINO, P.; CASANOVA, L.; CELIO, A.; BENTANCUR, O.; LEONI, C.; ALANIZ, S. |
Afiliación : |
PEDRO MONDINO, Universidad de la República (UdelaR)/ Facultad de Agronomía; LETICIA CASANOVA, Universidad de la República (UdelaR)/ Facultad de Agronomía; ANTONELLA CELIO, Universidad de la República (UdelaR)/ Facultad de Agronomía; OSCAR BENTANCUR, Universidad de la República (UdelaR)/ Facultad de Agronomía; CAROLINA LEONI VELAZCO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; SANDRA ALANIZ, Universidad de la República (UdelaR)/ Facultad de Agronomía. |
Título : |
Sensitivity of Venturia inaequalis to Trifloxystrobin and Difenoconazole in Uruguay. |
Fecha de publicación : |
2015 |
Fuente / Imprenta : |
Journal of Phytopathology, 2015, v.163, p.1-10. |
DOI : |
10.1111/jph.12274 |
Idioma : |
Inglés |
Notas : |
Original article. Received: December 26, 2013; accepted: April 4, 2014. |
Contenido : |
ABSTRACT.
The sensitivity of Venturia inaequalis to trifloxystrobin and difenoconazole was studied in Uruguay. Populations of V. inaequalis were collected from apple orchards with different histories of trifloxystrobin use. Sensitivity of populations to trifloxystrobin was analysed using a method for testing spore germination published by FRAC, using a discriminatory concentration of 2.0 mg a.i./l. Resistance to trifloxystrobin was widespread in the region of commercial apple production with resistance detected in all orchards examined, the incidences ranging from 3% to 95%. The highest frequencies were found in orchards with the most intensive use of Quinone outside inhibitors (QoI) fungicides. Sensitivities of isolates of V. inaequalis to difenoconazole were assessed at five concentrations using a mycelial growth assay on isolates (33 isolates per orchard) from one non-commercial (baseline orchard) and two commercial orchards having differing histories of difenoconazole use. Populations in both commercial orchards exhibited reduced sensitivities to difenoconazole compared to the baseline orchard. Resistance factor (RF) values of 6.6 and 11.74 were measured in the orchards with moderate (up to 4 sprays per season) and
intensive use (more than 5 sprays per season) of difenoconazole, respectively. A single-assessment concentration (SAC) was identified for assessing difenoconazole sensitivity of V. inaequalis isolates by fitting linear regressions between log10 EC50 and relative growth (RG) of the isolates at each fungicide concentration testing, and comparing the goodness-of-fit of the regression lines. Comparable results were obtained based on EC50 values and RG values at a SAC of 0.05 mg of active ingredient per litre (a.i. per l). Populations from both commercial orchards differed from the baseline population, in that isolates with RG ≥70 were present at substantial levels in the former but absent from the latter. MenosABSTRACT.
The sensitivity of Venturia inaequalis to trifloxystrobin and difenoconazole was studied in Uruguay. Populations of V. inaequalis were collected from apple orchards with different histories of trifloxystrobin use. Sensitivity of populations to trifloxystrobin was analysed using a method for testing spore germination published by FRAC, using a discriminatory concentration of 2.0 mg a.i./l. Resistance to trifloxystrobin was widespread in the region of commercial apple production with resistance detected in all orchards examined, the incidences ranging from 3% to 95%. The highest frequencies were found in orchards with the most intensive use of Quinone outside inhibitors (QoI) fungicides. Sensitivities of isolates of V. inaequalis to difenoconazole were assessed at five concentrations using a mycelial growth assay on isolates (33 isolates per orchard) from one non-commercial (baseline orchard) and two commercial orchards having differing histories of difenoconazole use. Populations in both commercial orchards exhibited reduced sensitivities to difenoconazole compared to the baseline orchard. Resistance factor (RF) values of 6.6 and 11.74 were measured in the orchards with moderate (up to 4 sprays per season) and
intensive use (more than 5 sprays per season) of difenoconazole, respectively. A single-assessment concentration (SAC) was identified for assessing difenoconazole sensitivity of V. inaequalis isolates by fitting linear regressions between log10 EC50 and relat... Presentar Todo |
Palabras claves : |
APPLE SCAB; DMIs; FUNGICIDE RESISTANCE; RESISTENCIA A LOS FUNGICIDAS; SARNA DEL MANZANO; SINGLE-ASSESSMENT CONCENTRATION. |
Thesagro : |
ENFERMEDADES DE LAS PLANTAS; MANZANO; SARNA. |
Asunto categoría : |
H20 Enfermedades de las plantas |
Marc : |
LEADER 02876nga a2200313 a 4500 001 1053947 005 2015-11-19 008 2015 bl uuuu u00u1 u #d 024 7 $a10.1111/jph.12274$2DOI 100 1 $aMONDINO, P. 245 $aSensitivity of Venturia inaequalis to Trifloxystrobin and Difenoconazole in Uruguay. 260 $c2015 500 $aOriginal article. Received: December 26, 2013; accepted: April 4, 2014. 520 $aABSTRACT. The sensitivity of Venturia inaequalis to trifloxystrobin and difenoconazole was studied in Uruguay. Populations of V. inaequalis were collected from apple orchards with different histories of trifloxystrobin use. Sensitivity of populations to trifloxystrobin was analysed using a method for testing spore germination published by FRAC, using a discriminatory concentration of 2.0 mg a.i./l. Resistance to trifloxystrobin was widespread in the region of commercial apple production with resistance detected in all orchards examined, the incidences ranging from 3% to 95%. The highest frequencies were found in orchards with the most intensive use of Quinone outside inhibitors (QoI) fungicides. Sensitivities of isolates of V. inaequalis to difenoconazole were assessed at five concentrations using a mycelial growth assay on isolates (33 isolates per orchard) from one non-commercial (baseline orchard) and two commercial orchards having differing histories of difenoconazole use. Populations in both commercial orchards exhibited reduced sensitivities to difenoconazole compared to the baseline orchard. Resistance factor (RF) values of 6.6 and 11.74 were measured in the orchards with moderate (up to 4 sprays per season) and intensive use (more than 5 sprays per season) of difenoconazole, respectively. A single-assessment concentration (SAC) was identified for assessing difenoconazole sensitivity of V. inaequalis isolates by fitting linear regressions between log10 EC50 and relative growth (RG) of the isolates at each fungicide concentration testing, and comparing the goodness-of-fit of the regression lines. Comparable results were obtained based on EC50 values and RG values at a SAC of 0.05 mg of active ingredient per litre (a.i. per l). Populations from both commercial orchards differed from the baseline population, in that isolates with RG ≥70 were present at substantial levels in the former but absent from the latter. 650 $aENFERMEDADES DE LAS PLANTAS 650 $aMANZANO 650 $aSARNA 653 $aAPPLE SCAB 653 $aDMIs 653 $aFUNGICIDE RESISTANCE 653 $aRESISTENCIA A LOS FUNGICIDAS 653 $aSARNA DEL MANZANO 653 $aSINGLE-ASSESSMENT CONCENTRATION 700 1 $aCASANOVA, L. 700 1 $aCELIO, A. 700 1 $aBENTANCUR, O. 700 1 $aLEONI, C. 700 1 $aALANIZ, S. 773 $tJournal of Phytopathology, 2015$gv.163, p.1-10.
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INIA Las Brujas (LB) |
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Registro completo
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Biblioteca (s) : |
INIA Las Brujas. |
Fecha actual : |
07/07/2021 |
Actualizado : |
07/07/2021 |
Tipo de producción científica : |
Artículos Indexados |
Autor : |
PASA M.D.S.; CARRA, B.; BRIGHENTI A.F.; PINTO F.A.M.F.; DE MELLO-FARIAS P.C.; HERTER F.G. |
Afiliación : |
MATEUS DA SILVEIRA PASA, Universidade Federal de Pelotas, Departamento de Fitotecnia, Capão do Leão, Rio Grande do Sul, Brazil; BRUNO CARRA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; ALBERTO FONTANELLA BRIGHENTI, Universidade Federal de Santa Catarina, Departamento de Fitotecnia, Florianópolis, Santa Catarina, Brazil; FELIPE AUGUSTO MORETTI FERREIRA PINTO, Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina, Estação Experimental de São Joaquim, São Joaquim, Santa Catarina, Brazil; PAULO CELSO DE MELLO-FARIAS, Universidade Federal de Pelotas, Departamento de Fitotecnia, Capão do Leão, Rio Grande do Sul, Brazil; FLÁVIO GILBERTO HERTER, Universidade Federal de Pelotas, Departamento de Fitotecnia, Capão do Leão, Rio Grande do Sul, Brazil. |
Título : |
Ethephon as a Potential Tool to Manage Alternate Bearing of 'Fuji' Apple Trees. |
Complemento del título : |
Crop Production. |
Fecha de publicación : |
2021 |
Fuente / Imprenta : |
Revista Ceres, 2021, volume 68, Issue 3, Pages 180 - 184. OPEN ACCESS. Doi: https://doi.org/10.1590/0034-737X202168030003 |
ISSN : |
0034-737X |
DOI : |
10.1590/0034-737X202168030003 |
Idioma : |
Inglés |
Notas : |
Article history: Submitted 21 May 2020; Accepted 15 November 2020; Published 16 June 2021; Date of issue May-Jun 2021. |
Contenido : |
ABSTRACT - The objective of this study was to investigate the effect of different rates of ethephon on return bloom and yield, and fruit quality of 'Fuji' apple trees. The experiment was performed during the 2014/2015 and 2015/2016 growing seasons. Eighteen-year-old Fuji Standard apple trees grafted on M.9 were sprayed with different rates of ethephon (300 mg L-1, 400 mg LL-1, and 500 mg L-1) 30 days after full bloom (DAFB) and compared to an unsprayed control. Yield components (number of fruit per tree, yield, fruit weight, and estimated yield) and fruit quality attributes (fruit firmness, total soluble solids and starch-iodine index) were evaluated in both seasons. Return bloom (percentage of flowering spurs and 1-year-shoots) was assessed only the year following the application. Our results show that ethephon increases return bloom and yield of 'Fuji Standard' apple trees, without affecting fruit quality attributes.
© 2021. All Rights Reserved. |
Palabras claves : |
Flower bud differentiation; Malus dometica Borkh; Return bloom; Return yield. |
Asunto categoría : |
F01 Cultivo |
URL : |
https://www.scielo.br/j/rceres/a/zqr3XVTKyHfYb4z7SZPQcsQ/?lang=en&format=pdf
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Marc : |
LEADER 01911naa a2200265 a 4500 001 1062277 005 2021-07-07 008 2021 bl uuuu u00u1 u #d 022 $a0034-737X 024 7 $a10.1590/0034-737X202168030003$2DOI 100 1 $aPASA M.D.S. 245 $aEthephon as a Potential Tool to Manage Alternate Bearing of 'Fuji' Apple Trees.$h[electronic resource] 260 $c2021 500 $aArticle history: Submitted 21 May 2020; Accepted 15 November 2020; Published 16 June 2021; Date of issue May-Jun 2021. 520 $aABSTRACT - The objective of this study was to investigate the effect of different rates of ethephon on return bloom and yield, and fruit quality of 'Fuji' apple trees. The experiment was performed during the 2014/2015 and 2015/2016 growing seasons. Eighteen-year-old Fuji Standard apple trees grafted on M.9 were sprayed with different rates of ethephon (300 mg L-1, 400 mg LL-1, and 500 mg L-1) 30 days after full bloom (DAFB) and compared to an unsprayed control. Yield components (number of fruit per tree, yield, fruit weight, and estimated yield) and fruit quality attributes (fruit firmness, total soluble solids and starch-iodine index) were evaluated in both seasons. Return bloom (percentage of flowering spurs and 1-year-shoots) was assessed only the year following the application. Our results show that ethephon increases return bloom and yield of 'Fuji Standard' apple trees, without affecting fruit quality attributes. © 2021. All Rights Reserved. 653 $aFlower bud differentiation 653 $aMalus dometica Borkh 653 $aReturn bloom 653 $aReturn yield 700 1 $aCARRA, B. 700 1 $aBRIGHENTI A.F. 700 1 $aPINTO F.A.M.F. 700 1 $aDE MELLO-FARIAS P.C. 700 1 $aHERTER F.G. 773 $tRevista Ceres, 2021, volume 68, Issue 3, Pages 180 - 184. OPEN ACCESS. Doi: https://doi.org/10.1590/0034-737X202168030003
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