First Report ofCorynespora cassiicolaCausing Leaf and Calyx Spot on Roselle in Mexico

Escalas logarítmicas diagramáticas para evaluar la severidad del manchado de hojas y cálices de jamaica

“…Guerrero is the main state producer nationwide where Ayutla and Tecoanapa municipalities provide more than 50 % of the state production (SIAP, 2014). Spotted leaves and calyces induced by Corynespora cassiicola, is currently considered the main limiting factor for the production of this crop, as there have been incidence in the order of 100 % (Ortega-Acosta et al, 2015). The symptoms in leaves consist of circular to irregular spots with straw-colored center, black borders and purple rings, which coalesce into large necrotic lesions.…”

“…The symptoms in leaves consist of circular to irregular spots with straw-colored center, black borders and purple rings, which coalesce into large necrotic lesions. In calyces, initially stage occur sunken spots necrotic of circular or irregular shape, and in advanced stages of infection originated blight (Ortega-Acosta et al, 2015). Despite the importance of this disease, currently there is not a standardized method to assess its severity, which is a fundamental parameter in epidemiological studies and evaluation of management practices, among others.…”

“…A nivel nacional, Guerrero es el principal productor, en dónde los municipios de Ayutla y Tecoanapa aportan más del 50 % de la producción nacional (SIAP, 2014). El manchado de hojas y cálices inducido por Corynespora cassiicola, actualmente es considerado el principal factor limitante para la producción de jamaica, ya que se han registrado incidencias del orden del 100 % (Ortega-Acosta et al, 2015). Los síntomas en hojas consisten de manchas circulares a irregulares con centro color pajizo, bordes negros y anillos púrpuras, que al coalescer forman grandes lesiones necróticas.…”

Virus asociados al amarillamiento de Hibiscus sabdariffa en Guerrero, México

“…México ocupa el séptimo lugar, siendo el estado de Guerrero el mayor productor, con una superficie sembrada de 14 274 ha (SIAP, 2014). El principal problema fitosanitario de este cultivo en México es la "pierna negra" causada por Phytophthora parasitica y actualmente la mancha foliar y de cálices ocasionada por Corynespora cassiicola (Ortega et al, 2015). A nivel mundial existen cuatro virus afectando jamaica: Cotton leafcurl virus (CLCuV), Mesta yellow vein mosaic virus (MeYVMV), Malva vein clearing virus (MVCV) y Okra mosaic virus (OkMV) (Fauquet et al, 2005;Roy et al, 2009).…”

“…Mexico is seventh place, and the state of Guerrero is the main producer nationwide, with a planted surface of 14 274 ha (SIAP, 2014). The main phytosanitary problem of this crop in Mexico is "black shank," caused by Phytophthora parasitica, and currently, spots on leaves and calyces caused by Corynespora cassiicola (Ortega et al, 2015). Worldwide there are four viruses that affect roselle: Cotton leafcurl virus (CLCuV), Mesta yellow vein mosaic virus (MeYVMV), Malva vein clearing virus (MVCV), and Okra mosaic virus (OkMV) (Fauquet et al, 2005;Roy et al, 2009).…”