Algunas caracteristicas del hongo que causa la rona de yuca (Manihot esculenta Crantz) en Costa Rica

By:

LARIOS, J

Contributor(s):

MORENO, R.A

Material type: Article

ArticleLanguage: Spanish Description: 12(1):1-5Subject(s): LOC classification:

8413

In: FitopatologiaSummary: Las caracteristicas del hongo que causa superalargamiento de la yuca en Costa Rica (Sphaceloma sp.) fueron similares a las descritas en otras partes. Los medios de cultivo preparados con hojas de yuca-dextrosa, papa-dextrosa y Czapeck tuvieron un buen crecimiento del hongo. Las colonias presentaron un color especifico, de acuerdo con el medio en que se desarrollaron. La optima temperatura de crecimiento oscilo entre 25-29 grados centigrados y la mayor acumulacion de peso seco ocurrio a un pH de 5. Bajo condiciones de luz artificial, se obtuvo un buen desarrollo de la colonia a 475-700 nm. Bajo condiciones naturales, se observo resistencia en el 80 por ciento de los cultivares de yuca de la coleccion del Centro Agronomico Tropical de Investigacion y Ensenanza (CATIE), todas de origen local. (RA-CIAT)Summary: The morphological characteristics of the fungus causing superelongation of cassava in Costa Rica (Sphaceloma sp.) were similar to those described else where. Culture media prepared with cassava leaves-dextrose, potato dextrose, and Czapeck supported good growth. Colonies had a specific color according to the medium on which they developed. Optimum growth temperature was between 25- 29 degrees Celsius, and highest dry wt accumulation occurred at a pH of 5. Under artificial illumination, adequate colony development was obtained at 473-700 nm. Under natural conditions, 80 percent of the cassava cultivars in the Centro Agonomico Tropical de Investigacion y Ensenanza (CATIE) collection, all of local origin, were resistant. (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	8413 (Browse shelf(Opens below))	c.1	Short Loan		100069182

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Las caracteristicas del hongo que causa superalargamiento de la yuca en Costa Rica (Sphaceloma sp.) fueron similares a las descritas en otras partes. Los medios de cultivo preparados con hojas de yuca-dextrosa, papa-dextrosa y Czapeck tuvieron un buen crecimiento del hongo. Las colonias presentaron un color especifico, de acuerdo con el medio en que se desarrollaron. La optima temperatura de crecimiento oscilo entre 25-29 grados centigrados y la mayor acumulacion de peso seco ocurrio a un pH de 5. Bajo condiciones de luz artificial, se obtuvo un buen desarrollo de la colonia a 475-700 nm. Bajo condiciones naturales, se observo resistencia en el 80 por ciento de los cultivares de yuca de la coleccion del Centro Agronomico Tropical de Investigacion y Ensenanza (CATIE), todas de origen local. (RA-CIAT) spa

The morphological characteristics of the fungus causing superelongation of cassava in Costa Rica (Sphaceloma sp.) were similar to those described else where. Culture media prepared with cassava leaves-dextrose, potato dextrose, and Czapeck supported good growth. Colonies had a specific color according to the medium on which they developed. Optimum growth temperature was between 25- 29 degrees Celsius, and highest dry wt accumulation occurred at a pH of 5. Under artificial illumination, adequate colony development was obtained at 473-700 nm. Under natural conditions, 80 percent of the cassava cultivars in the Centro Agonomico Tropical de Investigacion y Ensenanza (CATIE) collection, all of local origin, were resistant. (AS) eng