Las condiciones climaticas del Estado Aragua y su relacion con la incidencia y severidad del anublo bacteriano de la yuca (Manihot esculenta Crantz)

By:

MARCANO, M

Contributor(s):

Material type: Article

ArticleLanguage: Spanish Description: 13(1- 4):151-166Subject(s): LOC classification:

26367

In: Revista de la Facultad de Agronomía, Universidad Central de Venezuela (Maracay, Venezuela)Summary: Observaciones hechas en condiciones de campo (Maracay, Venezuela) y de umbraculo indicaron que la cantidad de precipitacion y su distribucion son los factores climaticos que mas afectan la incidencia y la severidad de CBB en el Estado de Aragua, Venezuela. Durante los meses de junio, ago. y sept. (estacion lluviosa), la precipitacion prom. mensual durante los ultimos 10 anos era igual o por encima de los 100 mm. Se observaron sintomas tipicos de CBB (manchas angulares, exudado bacteriano, marchitez y muerte regresiva) en los expt. de campo y de umbraculo durante este periodo del ano. Los meses de dic., ene., feb. y marzo (estacion seca) presentan generalmente valores de precipitacion de menos de 15 mm/mes, y no se observaron sintomas de CBB durante esta epoca. Los meses de abril, mayo, oct. y nov. son intermedios en cuanto a precipitacion, y CBB puede presentarse o no. Las evaluaciones de la resistencia a CBB de material genetico deben realizarse durante la estacion lluviosa. (RA)Summary: Observations made under field (Maracay, Venezuela) and shade house conditions indicated that the amount and distribution of rainfall are the climatic factors that most affected the incidence and severity of CBB in the state of Aragua, Venezuela. During the mo. of June, Aug., and Sept. (rainy season), the monthly av. rainfall for the last 10 yr was equal to or over 100 mm. The typical symptoms of CBB (angular spots, bacterial exudate, wilting, and dieback) were observed in field and shade house expt. during that season. The mo. of Dec., Jan., Feb, and March (dry season) usually receive less than 15 mm rainfall/mo., and no CBB symptoms were observed in this season. The mo. of April, May, Oct., and Nov. are intermediate in rainfall, and CBB may or not occur. The evaluations of CBB resistance of genetic material should be carried out during the rainy season. (AS)

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Holdings
Item type	Current library	Collection	Call number	Copy number	Status	Date due	Barcode	Item holds
Journal Article	CIAT Library Document collection CINFOS	Document Collection CINFOS	26367 (Browse shelf(Opens below))	c.1	Short Loan		100042956

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Observaciones hechas en condiciones de campo (Maracay, Venezuela) y de umbraculo indicaron que la cantidad de precipitacion y su distribucion son los factores climaticos que mas afectan la incidencia y la severidad de CBB en el Estado de Aragua, Venezuela. Durante los meses de junio, ago. y sept. (estacion lluviosa), la precipitacion prom. mensual durante los ultimos 10 anos era igual o por encima de los 100 mm. Se observaron sintomas tipicos de CBB (manchas angulares, exudado bacteriano, marchitez y muerte regresiva) en los expt. de campo y de umbraculo durante este periodo del ano. Los meses de dic., ene., feb. y marzo (estacion seca) presentan generalmente valores de precipitacion de menos de 15 mm/mes, y no se observaron sintomas de CBB durante esta epoca. Los meses de abril, mayo, oct. y nov. son intermedios en cuanto a precipitacion, y CBB puede presentarse o no. Las evaluaciones de la resistencia a CBB de material genetico deben realizarse durante la estacion lluviosa. (RA)

Observations made under field (Maracay, Venezuela) and shade house conditions indicated that the amount and distribution of rainfall are the climatic factors that most affected the incidence and severity of CBB in the state of Aragua, Venezuela. During the mo. of June, Aug., and Sept. (rainy season), the monthly av. rainfall for the last 10 yr was equal to or over 100 mm. The typical symptoms of CBB (angular spots, bacterial exudate, wilting, and dieback) were observed in field and shade house expt. during that season. The mo. of Dec., Jan., Feb, and March (dry season) usually receive less than 15 mm rainfall/mo., and no CBB symptoms were observed in this season. The mo. of April, May, Oct., and Nov. are intermediate in rainfall, and CBB may or not occur. The evaluations of CBB resistance of genetic material should be carried out during the rainy season. (AS)