Abstract

GOMES, Rommel dos Santos Siqueira; SOUZA, José Thiago Aires; BARRETO, Gabriel Ginane  and  NASCIMENTO, Luciana Cordeiro do. Identification of associated fungi to diseases in Cereus jamacaru and Cereus hildmannianus. Rev. mex. fitopatol [online]. 2020, vol.38, n.2, pp.250-257.  Epub Nov 27, 2020. ISSN 2007-8080.  https://doi.org/10.18781/r.mex.fit.2002-3.

Although cacti are well adapted to the climatic rigors of the Brazilian semiarid region, they run the risk of being affected by important phytosanitary problems. These problems cause serious damage during their development. Therefore, the correct diagnosis of the etiologic agent is the most important step to enable the recommendation of efficient control strategies. The objective of this study was to identify etiological agents that caused diseases in mandacaru cladodes (Cereus jamacaru) and mandacaru spineless (C. hildmannianus). The cladodes were collected from infected plants in the field in the Sítio Paraíso community, in the municipality of Prata, State of Paraíba, Brazil. They were analyzed at the Phytopathology Laboratory/CCA/UFPB. The fungal structures were observed under optical microscopy, from vegetative and reproductive structures of the fungi grown in PDA (potato-dextrose-agar) medium at 25 ±2 ºC and under a photoperiod of 12 h of light. The genera were observed: Aspergillus niger, Aspergillus sp., Cladosporium sp., Colletotrichum sp., Curvularia sp., Fusarium sp., Rhizopus sp. and Scytalidium lignicola. The fungi Colletotrichum sp. and S. lignicola are considered the first reports of episodes of Cereus jacamaru and C. hildemannianus in State of Paraíba, Brazil.

Keywords : Cactaceae; mandacaru; northeast; health; Brazilian semiarid region.

        · abstract in Spanish     · text in English | Spanish     · English ( pdf ) | Spanish ( pdf )