Root-lesion nematode on walnut: Replants of California black walnut and unselected Paradox hybrid responded to preplanting soil fumigation in trials
B. F. Lownsbery, University of California
S. A. Sher, University of California
California Agriculture 12(5):7-12. DOI: 10.3733/ca.v012n05p7.
B. F. Lownsbery is Assistant Nematologist, University of California, Davis. S. A. Sher is Assistant Nematologist, University of California, Riverside.
Abstract Not Available – First paragraph follows:
Infestations of root-lesion nematodes—Pratylenchus vulnus—occur in all important walnut growing areas in California and high population densities cause a disease of economic importance. The disease is characterized by stunting, die-back, and chlorosis in the tops of the trees; by yield reduction; and by root symptoms consisting of black lesions, longitudinal cracking, and even death of entire roots. The disease has been induced experimentally by adding a suspension of the root-lesion nematodes to California black walnut seedlings.
Fred M. Charles, Farm Advisor, San Joaquin County, University of California, participated in this work.