%0 Journal Article
%T Respuesta de 11 variedades de ca a de az迆car a la escaldadura foliar (Xanthomonas albilineans (Ashby) Dowson) y evaluaci車n de dos m谷todos de inoculaci車n Response of 11 sugarcane varieties (Saccharum sp.) to leaf scald Xanthomonas albilineans (Ashby) Dowson, and evaluation of two inoculation methods
%A Odaliz Jim谷nez
%A Nancy Contreras
%J Bioagro
%D 2009
%I Decanato de Agronom赤a de la Universidad Centroccidental
%X La escaldadura de la hoja, causada por la bacteria Xanthomonas albilineans, es una de las principales enfermedades de la ca a de az迆car (Saccharum sp.), localiz芍ndose en 65 pa赤ses del mundo. La resistencia varietal es considerada un factor de suma importancia dentro del manejo de esta enfermedad. Con el objetivo de evaluar el comportamiento de la ca a de az迆car a Xanthomonas albilineans, fueron inoculadas las variedades C26670, RB74454, CP742005, CC8592, SP724928, C32368, CR74250, RB855536, RB855113, RB855546, SP701284 empleando una suspensi車n bacteriana de 10(8) c谷lulas﹞mL-1 y el testigo fue tratado con agua destilada est谷ril. Se utilizaron dos m谷todos de inoculaci車n: inyecci車n de la suspensi車n bacteriana en el nudo del esqueje, o colocaci車n de un algod車n impregnado de suspensi車n bacteriana en uno de los extremos del esqueje. Se utiliz車 un dise o completamente al azar. El m谷todo de inoculaci車n del algod車n impregnado con suspensi車n bacteriana result車 ser el m芍s efectivo. El an芍lisis estad赤stico detect車 diferencias altamente significativas en cuanto al comportamiento de las variedades. Las variedades CC8592 y RB 855546 presentaron los mayores niveles de susceptibilidad seguida por las variedades RB 855113 y C32368. La variedad CP742005 result車 ser la menos susceptible. Leaf scald, caused by the bacterium Xanthomonas albilineans, is a major diseases of sugarcane (Saccharum sp.) and has been found in 65 countries worldwide. Varietal resistance is a factor of great importance in the management of the disease. In order to evaluate the response of sugarcane to Xanthomonas albilineas the varieties C26670, RB74454, CP742005, CC8592, SP724928, C32368, CR74250, RB855536, RB855113, RB855546, and SP701284 were inoculated using a bacterial suspension of 10(8) cell﹞mL-1; the control was treated with sterile distilled water. Two methods of inoculation were employed: injecting the bacterial suspension in a node of the stem or placement of a cotton swab impregnated with bacterial suspension at one end of the stem. A completely randomized design was used. The method of inoculation by the impregnated cotton swab proved to be the most effective. Highly significant differences were found among the behavior of the varieties, being CC8592 and RB 855546 the ones with the highest levels of susceptibility followed by RB 855113 and C32368. The variety CP742005 was the least susceptible.
%K Resistencia varietal
%K enfermedad bacteriana
%K susceptibilidad
%K Varietal resistance
%K bacterial disease
%K susceptibility
%U http://wwww.scielo.org.ve/scielo.php?script=sci_arttext&pid=S1316-33612009000200009