| spatiotemporal patterns in the airborne dispersal of spinach downy mildew. | downy mildew is the most devastating disease threatening sustainable spinach production, particularly in the organic sector. the disease is caused by the biotrophic oomycete pathogen peronospora effusa, and the disease results in yellow lesions that render the crop unmarketable. in this study, the levels of dna from airborne spores of p. effusa were assessed near a field of susceptible plants in salinas, ca during the winter months of 2013-14 and 2014/15 using rotating-arm impaction spore-trap s ... | 2017 | 27482627 |
| season-long dynamics of spinach downy mildew determined by spore trapping and disease incidence. | peronospora effusa is an obligate oomycete that causes downy mildew of spinach. downy mildew threatens sustainable production of fresh market organic spinach in california, and routine fungicide sprays are often necessary for conventional production. in this study, airborne p. effusa spores were collected using rotating arm impaction spore trap samplers at four sites in the salinas valley between late january and early june in 2013 and 2014. levels of p. effusa dna were determined by a species-s ... | 2016 | 27442537 |
| population structure of peronospora effusa in the southwestern united states. | peronospora effusa is an obligate pathogen that causes downy mildew on spinach and is considered the most economically important disease of spinach. the objective of the current research was to assess genetic diversity of known historical races and isolates collected in 2014 from production fields in yuma, arizona and salinas valley, california. candidate neutral single nucleotide polymorphisms (snps) were identified by comparing sequence data from reference isolates of known races of the pathog ... | 2016 | 26828428 |