Researchers Study Ambrosia Beetle Species to Determine Native Ranges and Identify Possible Natural Enemies
Ambrosia beetles — now known to California avocado growers as the Polyphagous and Kuroshio shot hole borers — have invaded numerous areas outside their native range, causing substantial damage to avocado and other tree species. Drs. Richard Stouthamer and Akif Eskalen and their team conducted phylogenetic research to identify cryptic ambrosia beetle species in an effort to determine the native range of the species that have invaded California.
Effectiveness of Chipping and Solarization in Limiting the Emergence and Activity of Shot Hole Borers
With the emergence and spread of the polyphagous shot hole borer through Los Angeles, Orange and San Diego counties, researchers at the University of California Riverside examined means of reducing the spread of the beetle when transporting wood from infected trees.
CAC-funded Research Examines Avocado Thrips Management Options
Goal of the work was to improve obtain natural enemies for the Polyphagous and Kuroshio shot hole borers in California.
Trapping Optimization and Development of “attract and kill” strategy for the Polyphagous Shot Hole Borer in avocado
Goal of the work was to improve our ability to trap the beetles for detection of the invasive shot-hole borers.
Identification of Predatory Mites Associated with Persea Mite in Mexico and Genetic Analyses of Native and Invasive Persea Mite Populations
Molecular analyses of field-collected persea mite (Oligonychus perseae) specimens established that (1) ITS-2 provides reliable Oligonchyus species identification and (2) COI analyses were able to discern that California’s persea mite population originated from central Mexico. A comparison of predatory mite species (Phytoseiidae) from Mexico and California as originally intended was limited by challenges in amplifying COI/ITS-2 DNA from individual specimens but significant progress was made in optimizing non-destructive DNA extraction protocols for this taxonomic group.
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