Macrophomina Crown and Root Rot of Pistachio in California.

Clicks: 317
ID: 88329
2020
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Abstract
In this study, declining pistachio rootstocks were detected in newly planted commercial pistachio orchards in Kern County, California. Symptoms were characterized by wilted foliage combined with crown rot in the rootstock. From diseased trees, 42 isolates were obtained, and all had similar cultural and morphological characteristics of Analyses of nucleotide sequences of three gene fragments, the internal transcribed spacer region (ITS1-5.8S-ITS2), partial sequences of β-tubulin, and translation elongation factor 1-α () confirmed this identification, and 20 representative isolates are presented in the phylogenetic study. Testing of Koch's postulates showed that , when inoculated to stems and roots of the pistachio rootstocks using mycelial plugs or a microsclerotial suspension, is indeed pathogenic to this host. The widely used clonal University of California Berkeley I (UCBI) rootstock appeared highly susceptible to . , suggesting that this pathogen is an emerging threat to the production of pistachio in California. This study confirmed the association of with the decline of pistachio trees and represents the first description of this fungus as a crown rot-causing agent of pistachio in California.
Reference Key
nouri2020macrophominaplants Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Nouri, Mohamed T;Lawrence, Daniel P;Kallsen, Craig E;Trouillas, Florent P;
Journal Plants (Basel, Switzerland)
Year 2020
DOI
E134
URL
Keywords
pathogenicity root rot pistachio macrophomina phaseolina crown rot

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