Mark A. Doster

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Ochratoxin A is a toxic and carcinogenic fungal secondary metabolite; its presence in foods is increasingly regulated. Various fungi are known to produce ochratoxins, but it is not known which species produce ochratoxins consistently and which species cause ochratoxin contamination of various crops. We isolated fungi in the Aspergillus ochraceus group(More)
A new distinctive strain of Aspergillus nomius that produces the potent mycotoxins, aflatoxins, is described from pistachio, pecan, and fig orchards in California. Similar to the typical strain of A. nomius (as represented by the ex-type), the O strain produced both B and G aflatoxins but not cyclopiazonic acid, had similar conidial ornamentation, and grew(More)
Doster, M. A., Cotty, P. J., and Michailides, T. J. 2014. Evaluation of the atoxigenic Aspergillus flavus strain AF36 in pistachio orchards. Plant Dis. 98:948-956. The atoxigenic strain Aspergillus flavus AF36, which has been extensively used as a biocontrol agent in commercial corn and cotton fields to reduce aflatoxin contamination, was applied in(More)
Seed tubers of susceptible and moderately resistant cultivars were inoculated withPhytophthora infestans and planted in a field in four trials over three years. After emergence, the foliage was periodically examined for late blight lesions. For the four trials, blight was first observed 9, 5,4, and 4 days after the accumulation of 18 severity values(More)
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