Location: Crops Pathology and Genetics Research
Project Number: 5306-22000-015-09
Start Date: May 01, 2012
End Date: Apr 30, 2013
Open pollinated seeds collected this fall from selected black walnut and butternut accessions maintained at the Wolfskill Experimental Orchards in Winters, CA will be stratified, germinated and grown under glasshouse conditions. Once seedlings reach a trunk diameter of at least 0.5cm, the crown of the tree will be inoculated with A. tumefaciens. Selections that consistently show CG resistance for three years will be clonally propagated and tested for resistance to Phytophthora root rot, lesion nematodes and Armillaria root disease.