Get access

The influence of planting date, transgenic Bt maize and hybrid relative maturity on European corn borer Ostrinia nubilalis (Lepidoptera: Crambidae) ovipositional patterns

Authors

  • Motshwari Obopile,

    Corresponding author
    • Department of Entomology, Ohio Agricultural Research and Development Center, The Ohio State University, Wooster, Ohio, USA
    Search for more papers by this author
  • Ronald B. Hammond

    1. Department of Entomology, Ohio Agricultural Research and Development Center, The Ohio State University, Wooster, Ohio, USA
    Search for more papers by this author

Correspondence

Motshwari Obopile, Department of Crop Science and Production, Botswana College of Agriculture, Private Bag 0027, Gaborone, Botswana. Email: mobopile@bca.bw, mobopile@gmail.com

Abstract

A three year study was carried out at Hoytville and at Wooster, Ohio, USA from 2006 to 2008 to investigate the influence of planting date, transgenic maize and hybrid maturity on Ostrinia nubilalis (Hubner) population dynamics and oviposition patterns. Maize plants were planted in late April or early May, mid-May and early June during each year. The moth flight pattern showed bivoltine generations during the three years. The first moth flight peaked in June, with the populations declining during July. The second moth flight peaked in August and declined towards the end of September or early October. Egg mass density did not differ significantly between transgenic and non-transgenic maize of different maturities. Significant differences were observed, however, among planting dates, sampling dates, and sampling date × planting date interactions. Generally higher numbers of egg masses from second generation moths were deposited on late planted maize than middle and early plantings.

Ancillary