Utilization of the Sun Spray Ultra Fine mineral oil with myclobutanil to control the Powdery Mildew of Grapes (Oidium tuckeri)
In order to have new alternatives to control Powdery Mildew of Grapes (Oidium tuckeri), the effect of the mineral oil Ultra Fine Sun Spray (UFSS) was evaluated in combination with the ergosterol biosynthesis inhibitor fungicide (IBE) myclobutanil. The research was conducted in a Carignan vineyard located at the Rinconada de Maipú Experimental Station of the University of Chile, Metropolitan Region of Chile in the season 1996-97. The treatments were as follow: Control (T0); mineral oil UFSS 1% in mixture with myclobutanil 2E (2.4 cc a.i./HL, minor commercial dosage) every 14 (T1), 21 (T2) and 28 days (T3); myclobutanil 2E (2.88 cc a.i./HL, maximum commercial dosage) every 14 (T4), 21 (T5) and 28 days (T6) and two commercial treatments T7 and T8, the first one consisted in applying sulphur WP (320 g a.i..HL) every 14 days and myclobutanil 2E (2.88 cc a.i./HL) at the end of blossom and the second included myclobutanil 2E (2.88 cc a.i./HL) applied at the beginning of the season and one at the end of blossom and sulphur WP (320 g a.i./HL) every 14 days. The degree of control was measured by determining the incidence (% of clusters affected per plant) and severity (% of berries affected per clusters). A 100% of infection of Powdery Mildew was developed in the control (T0). The results allow to conclude that myclobutanil sprays at a dosage of 2.4 cc i.a./HL + mineral oil SSUF 1% every 14 days are more effective than when this fungicide is used at a dosage of 2.88 cc i.a./HL applied every 14, 21 and 28 days. Also, the sprays of the mixture of myclobutanil (2.88 cc i.a./HL) with mineral oil UFSS 1% applied every 28 days was as effective as the application of myclobutanil alone every 14 days. The less effective treatments were the commercials (T7 and T8) where were not observed differences between them when applying sulphur or myclobutanil at the beginning of the control program. Berries harvested from plants treated with UFSS showed no decrease in sugar contents (ºBrix). Also, an experiment to determine the myclobutanil persistence was made with the purpose of having a reference that supports the field results where myclobutanil was more effective to control the disease when was applied with mineral oil UFSS than the treatment with myclobutanil alone. The residual level of myclobutanil was evaluated in the berries at 0, 7, 14, 21 and 28 days, after applying myclobutanil alone (2.4 cc a.i./HL) and mixture with mineral oil UFSS 1%. When mixed with myclobutanil, UFSS oil increases the persistence of this IBE fungicide achieving also a very good control of the disease with only 4 sprays during the season, compared with the 7 or more sprays needed when using only sulphur or IBE fungicides.
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Facultad de Ciencias Agrarias. Universidad Austral de Chile
2001
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Montealegre, Jaime Chávez, Ximena Henríquez, José |
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Montealegre, Jaime Chávez, Ximena Henríquez, José Utilization of the Sun Spray Ultra Fine mineral oil with myclobutanil to control the Powdery Mildew of Grapes (Oidium tuckeri) |
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Montealegre, Jaime Chávez, Ximena Henríquez, José |
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Montealegre, Jaime |
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Utilization of the Sun Spray Ultra Fine mineral oil with myclobutanil to control the Powdery Mildew of Grapes (Oidium tuckeri) |
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Utilization of the Sun Spray Ultra Fine mineral oil with myclobutanil to control the Powdery Mildew of Grapes (Oidium tuckeri) |
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Utilization of the Sun Spray Ultra Fine mineral oil with myclobutanil to control the Powdery Mildew of Grapes (Oidium tuckeri) |
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Utilization of the Sun Spray Ultra Fine mineral oil with myclobutanil to control the Powdery Mildew of Grapes (Oidium tuckeri) |
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Utilization of the Sun Spray Ultra Fine mineral oil with myclobutanil to control the Powdery Mildew of Grapes (Oidium tuckeri) |
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utilization of the sun spray ultra fine mineral oil with myclobutanil to control the powdery mildew of grapes (oidium tuckeri) |
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In order to have new alternatives to control Powdery Mildew of Grapes (Oidium tuckeri), the effect of the mineral oil Ultra Fine Sun Spray (UFSS) was evaluated in combination with the ergosterol biosynthesis inhibitor fungicide (IBE) myclobutanil. The research was conducted in a Carignan vineyard located at the Rinconada de Maipú Experimental Station of the University of Chile, Metropolitan Region of Chile in the season 1996-97. The treatments were as follow: Control (T0); mineral oil UFSS 1% in mixture with myclobutanil 2E (2.4 cc a.i./HL, minor commercial dosage) every 14 (T1), 21 (T2) and 28 days (T3); myclobutanil 2E (2.88 cc a.i./HL, maximum commercial dosage) every 14 (T4), 21 (T5) and 28 days (T6) and two commercial treatments T7 and T8, the first one consisted in applying sulphur WP (320 g a.i..HL) every 14 days and myclobutanil 2E (2.88 cc a.i./HL) at the end of blossom and the second included myclobutanil 2E (2.88 cc a.i./HL) applied at the beginning of the season and one at the end of blossom and sulphur WP (320 g a.i./HL) every 14 days. The degree of control was measured by determining the incidence (% of clusters affected per plant) and severity (% of berries affected per clusters). A 100% of infection of Powdery Mildew was developed in the control (T0). The results allow to conclude that myclobutanil sprays at a dosage of 2.4 cc i.a./HL + mineral oil SSUF 1% every 14 days are more effective than when this fungicide is used at a dosage of 2.88 cc i.a./HL applied every 14, 21 and 28 days. Also, the sprays of the mixture of myclobutanil (2.88 cc i.a./HL) with mineral oil UFSS 1% applied every 28 days was as effective as the application of myclobutanil alone every 14 days. The less effective treatments were the commercials (T7 and T8) where were not observed differences between them when applying sulphur or myclobutanil at the beginning of the control program. Berries harvested from plants treated with UFSS showed no decrease in sugar contents (ºBrix). Also, an experiment to determine the myclobutanil persistence was made with the purpose of having a reference that supports the field results where myclobutanil was more effective to control the disease when was applied with mineral oil UFSS than the treatment with myclobutanil alone. The residual level of myclobutanil was evaluated in the berries at 0, 7, 14, 21 and 28 days, after applying myclobutanil alone (2.4 cc a.i./HL) and mixture with mineral oil UFSS 1%. When mixed with myclobutanil, UFSS oil increases the persistence of this IBE fungicide achieving also a very good control of the disease with only 4 sprays during the season, compared with the 7 or more sprays needed when using only sulphur or IBE fungicides.
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Facultad de Ciencias Agrarias. Universidad Austral de Chile |
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2001 |
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http://revistas.uach.cl/index.php/agrosur/article/view/3659 |
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AT montealegrejaime utilizationofthesunsprayultrafinemineraloilwithmyclobutaniltocontrolthepowderymildewofgrapesoidiumtuckeri AT chavezximena utilizationofthesunsprayultrafinemineraloilwithmyclobutaniltocontrolthepowderymildewofgrapesoidiumtuckeri AT henriquezjose utilizationofthesunsprayultrafinemineraloilwithmyclobutaniltocontrolthepowderymildewofgrapesoidiumtuckeri AT montealegrejaime usodelaceitemineralsunsprayultrafineenmezclaconmiclobutanilparacontrolareloidiodelavidoidiumtuckeri AT chavezximena usodelaceitemineralsunsprayultrafineenmezclaconmiclobutanilparacontrolareloidiodelavidoidiumtuckeri AT henriquezjose usodelaceitemineralsunsprayultrafineenmezclaconmiclobutanilparacontrolareloidiodelavidoidiumtuckeri |
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rev-agrosur-cl-article-36592019-10-01T16:09:34Z Utilization of the Sun Spray Ultra Fine mineral oil with myclobutanil to control the Powdery Mildew of Grapes (Oidium tuckeri) USO DEL ACEITE MINERAL SUN SPRAY ULTRA FINE EN MEZCLA CON MICLOBUTANIL PARA CONTROLAR EL OÍDIO DE LA VID (Oidium tuckeri) Montealegre, Jaime Chávez, Ximena Henríquez, José Aceite mineral Uncinula necator Residuos de fungicidas Miclobutanil Azufre Sun Spray Ultra Fine Oil Mineral oil Uncinula necator Fungicide residues Myclobutanil Sulphur Ultra Fine Sun Spray Oil In order to have new alternatives to control Powdery Mildew of Grapes (Oidium tuckeri), the effect of the mineral oil Ultra Fine Sun Spray (UFSS) was evaluated in combination with the ergosterol biosynthesis inhibitor fungicide (IBE) myclobutanil. The research was conducted in a Carignan vineyard located at the Rinconada de Maipú Experimental Station of the University of Chile, Metropolitan Region of Chile in the season 1996-97. The treatments were as follow: Control (T0); mineral oil UFSS 1% in mixture with myclobutanil 2E (2.4 cc a.i./HL, minor commercial dosage) every 14 (T1), 21 (T2) and 28 days (T3); myclobutanil 2E (2.88 cc a.i./HL, maximum commercial dosage) every 14 (T4), 21 (T5) and 28 days (T6) and two commercial treatments T7 and T8, the first one consisted in applying sulphur WP (320 g a.i..HL) every 14 days and myclobutanil 2E (2.88 cc a.i./HL) at the end of blossom and the second included myclobutanil 2E (2.88 cc a.i./HL) applied at the beginning of the season and one at the end of blossom and sulphur WP (320 g a.i./HL) every 14 days. The degree of control was measured by determining the incidence (% of clusters affected per plant) and severity (% of berries affected per clusters). A 100% of infection of Powdery Mildew was developed in the control (T0). The results allow to conclude that myclobutanil sprays at a dosage of 2.4 cc i.a./HL + mineral oil SSUF 1% every 14 days are more effective than when this fungicide is used at a dosage of 2.88 cc i.a./HL applied every 14, 21 and 28 days. Also, the sprays of the mixture of myclobutanil (2.88 cc i.a./HL) with mineral oil UFSS 1% applied every 28 days was as effective as the application of myclobutanil alone every 14 days. The less effective treatments were the commercials (T7 and T8) where were not observed differences between them when applying sulphur or myclobutanil at the beginning of the control program. Berries harvested from plants treated with UFSS showed no decrease in sugar contents (ºBrix). Also, an experiment to determine the myclobutanil persistence was made with the purpose of having a reference that supports the field results where myclobutanil was more effective to control the disease when was applied with mineral oil UFSS than the treatment with myclobutanil alone. The residual level of myclobutanil was evaluated in the berries at 0, 7, 14, 21 and 28 days, after applying myclobutanil alone (2.4 cc a.i./HL) and mixture with mineral oil UFSS 1%. When mixed with myclobutanil, UFSS oil increases the persistence of this IBE fungicide achieving also a very good control of the disease with only 4 sprays during the season, compared with the 7 or more sprays needed when using only sulphur or IBE fungicides. Ante la necesidad de contar con nuevas alternativas para el control del Oídio de la Vid (Oidium tuckeri), se evaluó el efecto del aceite mineral Sun Spray Ultra Fine (SSUF) en combinación con el fungicida inhibidor de la biosíntesis del ergosterol (IBE) miclobutanil. La investigación se realizó en un viñedo del cultivar Carignan, ubicado en la Estación Experimental Rinconada de Maipú de la Universidad de Chile, comuna de Maipú, Región Metropolitana de Chile durante la temporada 1996-97. Los tratamientos fueron: testigo (T0) sin aplicación; aceite mineral SSUF 1% en mezcla con miclobutanil 2E (2,4 cc i.a./HL, dosis comercial menor) cada 14 (T1), 21 (T2) y 28 días (T3); miclobutanil 2E (2,88 cc i.s./HL, dosis comercial mayor) cada 14 (T4), 21 (T5) y 28 días (T6) y dos tratamientos comerciales T7 y T8, el primero consistió en la aplicación de azufre PM (320 g i.a./HL) cada 14 días y miclobutanil 2E (2,88 cc i.a./HL) a fines de floración y el segundo incluyó miclobutanil 2E (2,88 cc i.a./HL) aplicado a comienzos de temporada y fines de floración y azufre PM (320 g i.a./HL) cada 14 días. El grado de control se midió determinando la incidencia (% de racimos infectados por planta) y severidad (% de bayas infectadas por racimos) de la enfermedad al estado fenológico de pinta. El testigo (T0) presentó un 100% de infección de oídio. Los resultados obtenidos permiten concluir que aspersiones de miclobutanil en dosis de 2,4 cc i.a./HL + aceite mineral SSUF 1% aplicado cada 14 días son más efectivas que aspersiones de miclobutanil en su dosis comercial (2,88 cc i.a./HL) aplicado cada 14, 21 y 28 días. Además, la aplicación de la mezcla de miclobutanil más SSUF cada 28 días fue tan efectiva como la aplicación de miclobutanil solo cada 14 días. Los tratamientos comerciales (T7 y T8) fueron los menos efectivos en el control del patógeno y no existieron diferencias entre ellos al aplicar azufre o miclobutanil al comienzo del programa de control. Los tratamientos que incluyeron aceite mineral SSUF no redujeron el contenido de azúcar (ºBrix) de las bayas. También se efectuó un ensayo indicador de persistencia con el fin de tener una referencia que respalde los resultados del ensayo de campo, donde se comprobó que era más eficiente el efecto de miclobutanil cuando se aplicó con aceite mineral que cuando se aplicó solo, para ello se evaluó el nivel de residuos de miclobutanil en las bayas a los 0, 7, 14, 21 y 28 días, después de aplicar miclobutanil (2,4 cc i.a./HL) solo y una mezcla de miclobutanil (2,4 cc i.a./HL) con aceite mineral SSUF 1%. Los resultados demostraron que al aplicar el miclobutanil en mezcla con aceite mineral SSUF 1% se logró prolongar la persistencia de este fungicida ya que siempre los niveles de residuos fueron mayores cuando se aplicó con aceite mineral que cuando se aplicó solo, lo cual permitió en el ensayo de campo disminuir el número de aplicaciones a solo 4 en la temporada en comparación con 7 o más necesarias cuando se emplea solamente azufre o fungicidas IBE. Facultad de Ciencias Agrarias. Universidad Austral de Chile 2001-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://revistas.uach.cl/index.php/agrosur/article/view/3659 10.4206/agrosur.2001.v29n2-02 Agro sur; Vol. 29 Núm. 2 (2001); 100-109 0719-4196 0304-8802 spa http://revistas.uach.cl/index.php/agrosur/article/view/3659/4525 Derechos de autor 2001 AGROSUR |