Batra, S. W. T.; Coulson, J. R.; Dunn, P. H.; Boldt, P. E. - Economic Research Service, Department of Agriculture - 1981
Six Eurasian species of Carduus thistles (Compositae: Cynareael are troublesome weeds in North America. They are attacked by about 340 species of phytophagous insects, including 71 that are oligophagous on Cynareae. Of these Eurasian insects, 39 were extensively tested for host specificity, and...
