2012 Annual Report
This incoming agreement was established with the Bureau of Land Management to support research on various invasive Eurasian weeds that impact U.S. rangelands. Research on medusahead rye included foreign exploration in Eurasia (Ukraine, Greece and Turkey) for pathogens and other agents. Field experiments were ongoing in Turkey to evaluate the impact of seed-feeding flies on medusahead and related grasses. A multi-year field experiment to study the epidemiology and impact of a Puccinia rust on Canada thistle is ongoing in Greece, where field observations were also initiated on a pathogen of milk thistle. Field host range tests in Eurasia are ongoing for insect agents of Scotch and Russian thistle (seed-feeding and stem-boring weevils, a moth and an eriophyid mite), perennial pepperweed (a root boring weevil and an eriophyid mite), and Russian knapweed (an eriophyid mite). We also continued ongoing research to provide analyses of hoary cress and its herbivorous weevil agent (with ARS, Sidney MT) and molecular analyses to barcode other weed target agents. A field study was initiated to investigate the interaction between a weevil agent and a pathogen and their impact on hoary cress. Reference to this agreement can be found in the report for the parent project 0212-22000-25-00D, DISCOVERY AND EVALUATION OF CLASSICAL BIOLOGICAL CONTROL AGENTS FOR INVASIVE EURASIAN WEEDS AFFECTING AGRICULTURAL AND NATURAL AREAS.