Esporulação de Erythricium salmonicolor e de seu anamorfo Necator decretus, agente causal da rubelose dos citros no Brasil

Abstract

Sporulation of both Erythricium salmonicolor and its anamorphic stage Necator decretus, causal agent of citrus pink disease in BrazilThe sporulation of Erythricium salmonicolor and its anamorph Necator decretus, causal agent of pink disease is reported for the first time on citrus in Brazil.A rubelose dos citros tem causado danos significativos à citricultura paulista nos últimos anos. A doença concentra-se nos galhos e ramos, sendo mais severa em árvores vigorosas e em pomares adensados. Os sintomas iniciais consistem em lesões com desprendimento da casca e exsudação de goma. Posteriormente, observam-se cordões miceliais e crescimento micelial róseo sobre os ramos afetados ( Figura 1A). Internamente, nesses ramos, observa-se descoloração dos tecidos. Quando essas lesões atingem a base dos galhos, pode ocorrer a morte de toda a copa da planta. Mesmo com o avanço dessa doença nos últimos anos, até então nenhuma estrutura reprodutiva do patógeno havia sido relatada em citros no Brasil (Feichtenberger et al., Manual de Fitopatologia, Vol. 2, p.239.

Influence of nutrient sources and environmental conditions on vegetative growth of fungus, Erythricium salmonicolor (Berk. & Broome) Burdsall in cocoa

“…1) and there is complete defoliation under severe infection. At the advanced stages of the disease, there are formations of orange-red pustules containing spores as the previous white pustules fade away (5). These pustules are formed on portions of the affected branches exposed to direct sunlight.…”

Competing sexual-asexual generic names in Agaricomycotina (Basidiomycota) with recommendations for use

“…Rant ( 1911 ) connected Necator to an unnamed Corticium and later Rant ( 1912 ) connected it to Corticium javanicum and C. salmonicolor (Petch 1912 ). Most recently the fungus in all stages has been classified as Erythricium salmonicolor (e. g. Moraes et al 2006 ) but also has been shown to be an independent sister taxon to Erythricium (Roux and Coetzee 2005 ; Ghobad-Nejhad et al 2010 ; Diederich et al 2011 ). In an overlooked publication, Harsojo-Tjokrosoedarmo ( 1992 , 1995 ) proposed a new genus Upasia for E. salmonico lor.…”