Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Biology of the Bidens Borer, Epiblema otiosana (Clemens) (Lepidoptera, Olethreutidae).

Abstract

An account is given of observations in Iowa on the ecology, seasonal history and bionomics of Epiblema otiosana, Clem, (bidens borer) [R.A.E., A, xv, 397], which is indigenous to the eastern half of the United States. The young larvae feed in the buds, blossoms, seed heads and leaves of Bidens spp., and the older ones tunnel down within the main stem or one of the lateral branches, causing the top to wilt. A partial third generation occurs, and this reaches a peak in September. This Tortricid constitutes an alternative host of the parasites of several species of economic importance, including Papaipema nebris, Gn., Pyrausta nubilalis[Ostrinia nubilalis], Hb., and Macronoctua onusta, Grote, 75-80 per cent. of its larvae in the field being sometimes attacked. The parasites reared from it were Lixophaga variabilis, Coq., Muscina stabulans, Fall., Ceromasia (Masicera) senilis, Mg., Sarcopkaga setulosa, Wulp (cimbicis, Towns.), Microdus (Bassus) simillimus, Cress., Pimpla (Epiurus) pterophori, Ashm., Microbracon caulicola, Gah., Apanteles harti, Vier., M. lutus, Prov., and Macrocentrus sp.