Synonyms and other taxonomic changes
NA members of the nominate subgenus revised in(1)
2.3-4.0 mm (Solomon et al. 1993)
Adults emerge during Jul-Aug and are present until autumn; one generation per year (Solomon et al. 1993)
Three ash seed weevils, Lignyodes bischoffi (Blatchley), L. helvolus (LeConte), and L. horridulus (Casey), occur throughout the United States and Canada. These weevils feed on the seeds of ashes and lilac. Over 60 percent of the ash seeds in the Northeastern States and up to 95 percent in the Great Plains may be destroyed. (Solomon et al. 1993)
Solomon J.D., Leininger T.D., Wilson A.D., Anderson R.L., Thompson L.C., McCracken F.I. (1993) Ash pests: A guide to major insects, diseases, air pollution injury and chemical injury. Gen. Tech. Rep. SO-96. U.S. Department of Agriculture, Forest Service, Southern Forest Experiment Station, New Orleans, LA. 45 pp.