Page Banner

United States Department of Agriculture

Agricultural Research Service

Research
headline bar
1 - Development of White Mold Resistant Peas
2 - Release of Six Green Pea Lines for Breeding With Outstanding Root Rot Resistant
3 - First Report of Chickpea Resistance to PEMV (Porter)
4 - Pratylenchus neglectus, P. thornei, and Paratylenchus hamatus Nematodes Causing Yield Reduction to Dryland Peas and Lentils in Idaho
5 - Identifying Potato Tubers with Resistance to the Late Blight Pathogen that caused the Irish Potato Famine.
6 - Identifying Emerging Pathogens in Peas.
7 - Identification of Metalaxyl-resistant Pythium Impacting Potato and Other Crop Production (Porter)
8 - Survival of Asexual Spores of the Late Blight Pathogen in Soil (Porter)
Identification of Metalaxyl-resistant Pythium Impacting Potato and Other Crop Production (Porter)

Several Pythium species causing leak on potato and seed rot of crops found in rotation with potatoes are managed by the systemic fungicide metalaxyl (Ridomil, Apron or Allegiance).  Soil samples from 312 fields cropped to potatoes in Idaho (140), Oregon (59), and Washington (113) were assessed for the presence of metalaxyl-resistant (MR) isolates of Pythium.  Altogether, 1.4%, 42.4%, and 32.7% of the fields from these states, respectively, were positive for MR Pythium.  The percentage of MR Pythium isolates to metalaxyl-sensitive isolates found in a field ranged from 0.9 to 92.5%.  Growers were informed of problematic fields impacting their disease management programs and alternative products are being investigated that will manage MR Pythium.

<< Previous    1     2     3     4     5     6     [7]     8     Next >>

Last Modified: 3/30/2012
Footer Content Back to Top of Page