Evaluation for crawler vigor of the Rhizaspidiotus donacis “arundo scale”, a biological control agent of Arundo donax, an invasive weed of the Rio Grande Basin.

Monday, November 11, 2013
Exhibit Hall 4 (Austin Convention Center)
Joshua Villarreal , Biology, University of Texas, Pan American, Edinburg, TX
John A. Goolsby , Cattle Fever Tick Research Laboratory, USDA, Agricultural Research Service, Edinburg, TX
Kenneth R. Summy , Department of Biology, University of Texas, Pan American, Edinburg, TX
Alex E. Racelis , Department of Biology, University of Texas, Pan American, Edinburg, TX
Don Thomas , Cattle Fever Tick Research Lab, USDA Agricultural Research Service, Edinburg, TX
Adalberto Perez de Leon , Knipling Bushland U.S. Livestock Insects Research Laboratory, USDA, Agricultural Research Service, Kerrville, TX
Ann Vacek , ARS, USDA Agricultural Research Service, Edinburg, TX
Crystal Salinas , ARS, USDA Agricultural Research Service, Edinburg, TX
The vigor of first instar Rhizaspidiotus donacis, “arundo scale” crawlers was estimated by measuring the distance walked inside of a gelatin capsule at a set period of time.  Estimates of crawler vigor are needed to prioritize which accessions should be shipped to distant field sites or released immediately at local rearing facilities. Vigor was significantly different between European accessions and for scale processed on Mondays following two day storage times.  
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