BSNB is caused by the fungal pathogen, Lecanosticta acicola (Siggers 1944). The disease is characterised by brown spots on necrotic yellow lesions at the points of infection and die-back of the needles from the apex, which often leads to premature defoliation (Ivory 1987). The high species diversity of Lecanosticta found in Mesoamerica suggests that this is a centre of diversity for the genus.Ä«rown spot needle blight (BSNB) or Lecanosticta needle blight is an important needle disease on Pinus species. Lecanosticta acicola was not found in any of the samples from Central America, and we hypothesize that it could be a northern hemisphere taxon. New host and country records were also found for the previously described L. These are described here as Lecanosticta jani sp. Phylogenetic analyses of the BT1, ITS, MS204, RPB2 and TEF1 gene regions revealed six species of Lecanosticta, four of which represented undescribed taxa. In this study, the species diversity of a large collection of Lecanosticta isolates from Central America was considered. However, the putative native pathogen, L. guatemalensis, have recently been described from Mexico and Guatemala respectively based on morphology and sequence-derived phylogenetic inference. This was based on the morphological variation between isolates believed to represent L. The pathogen is thought to have a Central American centre of origin. Lecanosticta acicola causes the disease known as brown spot needle blight (BSNB), on Pinus species.
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