Explanation of Names
Urophora sirunaseva (Hering 1938)
Centaurea solstitialis, yellow starthistle
It forms galls within seedheads of yellow starthistle. 2 generations per year.
Commercially available. Introduced from the Palaearctic as biological control
Washington State U.
Integrated Weed Control Project
. Seasonal phenology and impact of Urophora sirunaseva on yellow starthistle seed production in California