Abstract
ABSTRACT Damping-off is considered one of the most serious risks for production of Pinus seedlings due to the significant losses it can cause in forest nurseries. In Colombia there is little information about the etiology of this limiting disease. Different species of the genus Fusarium have been reported as causal agents, which makes the study of the pathogenicity of this genus relevant. In this study, strain 001F of Fusarium oxysporum was obtained from the diseased tissues of P. patula seedlings. The identity of the species was determined by sequencing the internal transcribed spacer (ITS) regions. Pathogenicity tests confirmed the ability of strain 001F to cause damping-off symptoms in P. patula and P. tecunumanii. Thus, F. oxysporum strain 001F represents a significant risk to produce tree species in Colombia and in other parts of the world.
Highlights
Colombia is the seventh country in the world in area covered with natural forests with about 49% of its terrestrial area (Sánchez-Cuervo et al, 2012). 24 million hectares are suitable for commercial reforestation, only 450.000 ha have been planted and for 2038 it is projected to increase to 1.5 million ha (UPRA, 2018)
Different species of the genus Fusarium have been reported as causal agents, which makes the study of the pathogenicity of this genus relevant
In the treatment of plants inoculated with the strain 001F, disease incidence gradually increased until reaching 85% after 23 days (P
Summary
Colombia is the seventh country in the world in area covered with natural forests with about 49% of its terrestrial area (Sánchez-Cuervo et al, 2012). 24 million hectares are suitable for commercial reforestation, only 450.000 ha have been planted and for 2038 it is projected to increase to 1.5 million ha (UPRA, 2018). For sustainable production of commercial forests diseases such as damping-off should be appropriately managed. Damping-off is considered one of the biggest phytosanitary risks affecting the future sustainability of the wood industry (Seseni et al, 2015; López-López et al, 2016). This is because it significantly decreases the possibility of obtaining healthy nursery seedlings suitable for the field (Vivas et al, 2012). This disease can progress rapidly and cause significant losses in forest productivity (García Díaz & Cibrián Tovar, 2011)
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