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Subject: First Report of Pseudocercosporella albida (Matta& Belliard) on red kidney bean (Phaseolus vulgaris L.) in North America
Date posted: November 17, 2003
Source: Disease Notes
In August of 2002, white leaf spot disease (Pseudocercosporella albida (Matta & Belliard)) was observed on red kidney bean (Phaseolus vulgaris L.) in three fields near Staples, Minnesota. The causal pathogen was identified via light and electron microscopy. Younger leaves remained relatively symptomless but older leaves had lesions covering the majority of the leaf surfaces. Historically the distribution of this fungus has been limited to a few Latin American countries with preference to the cooler climates at higher altitudes. Impact of this pathogen on bean yield in Minnesota was not determined but in the highlands of Colombia, where white leaf spot is endemic, yields can be reduced as much as 47%. This is the first report of Pseudocercosporella albida on dry bean in North America.

For the full story see:
del Río, L.E., C.A. Bradley, and R.S. Lamppa. 2003. First report of white leaf spot of dry bean caused by Pseudocercosporella albida in North America. Plant Disease 87: 1537; published online as D-2003-1003-01N.