current projects
- Genome wide association study (GWAS) with 270 unique genotypes from PNW breeding programs to identify resistance/tolerance to Pratylenchus penetrans
- The root lesion nematode (RLN), Pratylenchus penetrans, is a significant production limiting pathogen in red raspberry (Rubus idaeus) production in the Pacific Northwest which has been routinely managed with soil fumigation for several decades. Changes in regulations have resulted in fewer fumigation options and greater regulations requiring the identification of new management methods that don’t rely on chemical usage. The development of tolerant or resistant red raspberry cultivars can serve as a sustainable method for controlling RLN however, little is understood about the nature of RLN resistance or tolerance in this host. Collaborative efforts between the USDA-ARS, Oregon State University, Washington State University, British Columbia Berry Cultivar Development Inc. breeding programs, and the National Clonal Germplasm Repository are underway with the aim of better characterizing the resistance through a genome wide association study. This study is utilizing a diverse panel of 270 red raspberry genotypes and the evaluation of methods to improve the selection time of desirable genotypes using genomic prediction and high throughput phenotyping technologies.
- Field trials evaluating post-plant nematicides for management of P. penetrans and Xiphinema bakeri
PhD Student Savannah Phipps Poster on RLN in Red Raspberry | |
File Size: | 4224 kb |
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previous projects
Root Removal - The goal of this research project is to determine if the removal of raspberry roots remaining after the termination of a planting reduces inoculum densities of root lesion nematode (Pratylenchus penetrans) and the incidence of raspberry root rot (caused by Phytophthora rubi) in future plantings. This is a collaborative project with Washington State University and is funded by the Northwest Center for Small Fruits Research.
Post-Plant Nematicide – We have identified the most effective post-plant nematicides for root lesion nematode management are available to Washington red raspberry growers. We are currently working with industry and private partners to maximize the efficacy of oxamyl for root lesion nematode suppression and minimize off-site movement. This research is funded by the Washington Red Raspberry Commission, the Washington Commission for Pesticide Registration, and USDA-NIFA-PMAP.
Alternatives to broadcast fumigation – In collaboration with WSU, Walters Ag Research, and UC Cooperative extension, we are evaluating alternatives to broadcast fumigation with 1,3-dichloropropene and chloropicrin in raspberry production systems in Washington and California. Alternatives include: bed fumigation, tarping, and reduced rates of the fumigants. This research is funded by USDA-NIFA-RAMP and the Northwest Center for Small Fruits.
Post-Plant Nematicide – We have identified the most effective post-plant nematicides for root lesion nematode management are available to Washington red raspberry growers. We are currently working with industry and private partners to maximize the efficacy of oxamyl for root lesion nematode suppression and minimize off-site movement. This research is funded by the Washington Red Raspberry Commission, the Washington Commission for Pesticide Registration, and USDA-NIFA-PMAP.
Alternatives to broadcast fumigation – In collaboration with WSU, Walters Ag Research, and UC Cooperative extension, we are evaluating alternatives to broadcast fumigation with 1,3-dichloropropene and chloropicrin in raspberry production systems in Washington and California. Alternatives include: bed fumigation, tarping, and reduced rates of the fumigants. This research is funded by USDA-NIFA-RAMP and the Northwest Center for Small Fruits.