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Return to Texas Entomology - Compiled by Mike Quinn
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(on Silver-leaf Sunflower - Helianthus argophyllus)
Range: California to Indiana to New York to Florida, northern Mexico
Flight Period: May to August in North Carolina (Brimley, 1938)
Host: Various Asteraceae
Biology: Larvae feed in stems, adult emerges in the summer.
Brandhorst (1943) reported a pupa discovered in the root of Common Sunflower (Helianthus annuus) in western Kansas on Aug 2. The entrance hole into the stem was about 30 inches above ground. The adult emerged on Aug 5.
Similar Species: Three species north of Mexico:
Rhodobaenus pustulosus - Arizona
Rhodobaenus quinquepunctatus - eastern North America to Texas
Rhodobaenus tredecimpunctatus - wide-spread
Etymology: Rhodobaenus tredecimpunctatus (Illiger)
rhod, -o, =um (G). A rose
baen, -o (G). Walk, step
tri (L). Three
decim (L). Ten
punctat (L). Marked with pricks or punctures
Biography: Johann Karl Wilhelm Illiger (1775 - 1813) - Wikipedia
Arnett, R.H., Jr., M.C. Thomas, P. E. Skelley & J.H. Frank. (editors). 2002. American Beetles, Volume II: Polyphaga: Scarabaeoidea through Curculionoidea. CRC Press. 861 pp.
Brandhorst, C.T. 1943. A Study of the Relationship Existing Between Certain Insects and Some Native Western Kansas Forbs and Weedy Plants. Transactions of the Kansas Academy of Science. 46: 164-175.
Brimley, C.S. 1938. The Insects of North Carolina: Being a List of the Insects of North Carolina and Their Close Relatives. North Carolina Department of Agriculture, Raleigh. 560 pp.
22 Jul 2008 © Mike Quinn / mike.quinn@tpwd.state.tx.us / Texas Entomology / Texas Beetle Information