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• W8173189 abstract "Control strategies for controlling apple scab (Venturia inaequalis) include the use of highly active compounds with good protective (pre-symptoms) and curative (post-infection) activity. Among others, demethylation inhibitors (DMI), primarily triazoles, have been successfully used due to their outstanding after-infection control activity. In this study, the pre-infection and curative (after infection activity and post-symptom activity) control activities of (mg·L-1) cyproconazole (54), epoxyconazole (38), myclobutanil (60), and triflumizole (90) were studied. Our results corroborate previous reports indicating that DMI fungicides have strong after-infection activity, which was estimated in 96 h after the inoculation. Captan (2195 mg·L-1), included as control, provided a good control only when it was applied 24 h after inoculation. In contrast to captan, DMI fungicides were weak protectants, given 3-4 days of protection, while a 7- day protection period was obtained with captan. Cyproconazole (43 mg·L-1), epoxyconazole (30 mg·L-1), myclobutanil (48 mg·L-1), and triflumizole (72 mg·L-1) were weak in post-symptom activity, estimated by the degree of conidial germination after 10 to 12 days of treatment. In contrast, a significant post-symptom activity was obtained with 1120 mg·L-1 of captan and 390 mg·L-1 of dodine, but no effect was obtained with 1600 mg·L-1 of mancozeb. The addition of an adjuvant (Citowett, 20 ml·100L-1) significantly improved the post symptom activity of captan and dodine.Las estrategias de control de la sarna del manzano (Venturia inaequalis) consideran el uso de fungicidas con una alta accion preventiva (accion de pre-infeccion) y uso de fungicidas con una excelente accion curativa erradicante (accion retroactiva de post-infeccion). Los fungicidas inhibidores de esteroles (IBE), particularmente los triazoles, se han utilizado ampliamente debido a la excelente accion curativa erradicante que se estima entre 72 y 96 h post-infeccion. En este trabajo, se estudio la accion preventiva y la accion curativa (curativa erradicante y accion de post-sintomas) de los siguientes fungicidas: cyproconazol (54 mg·L-1), epoxyconazol (38 mg·L-1), miclobutanil (60 mg·L-1), y triflumizol (90 mg·L-1). Los resultados obtenidos corroboraron la potente accion curativa erradicante de los fungicidas IBE, la que en este trabajo fue de 96 h medidas desde la inoculacion. Captan (2195 mg·L-1), controlo satisfactoriamente V. inaequalis solo al aplicarlo 24 h despues de la inoculacion. A diferencia de captan, los fungicidas IBE tuvieron una debil accion preventiva, de 3 a 4 dias, mientras que captan protegio satisfactoriamente el cultivo por 7 dias. Ciproconazol (43 mg·L-1), epoxiconazol (30 mg·L-1), miclobutanil (48 mg·L-1), y triflumizol (72 mg·L-1) tuvieron una debil accion curativa de post-sintomas, estimada por el grado de inhibicion de las conidias luego de 10 a 12 dias de la aplicacion. Por el contrario, una accion curativa de post-sintoma muy significativa se obtuvo con captan (1120 mg·L-1) y en menor grado con dodine (390 mg·L-1). Mancozeb (1600 mg·L-1) no tuvo accion de post-sintoma. La incorporacion de humectante (Citowett, 20 ml·100L-1) mejoro significativamente la accion de post-sintomas de captan y dodine." @default.
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• W8173189 date "2001-12-05" @default.
• W8173189 modified "2023-09-27" @default.
• W8173189 title "Pre-infection and curative activity of sterol inhibitor fungicides against Venturia inaequalis on apples." @default.
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• W8173189 doi "https://doi.org/10.7764/rcia.v28i3.445" @default.
• W8173189 hasPublicationYear "2001" @default.
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