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Cereal Research Communications

, Volume 34, Issue 2–3, pp 1101–1107 | Cite as

Evaluation of corn hybrids for tolerance to corn rootworm (Diabrotica virgifera virgifera LeConte) larval feeding

  • M. IvezicEmail author
  • J. J. Tollefson
  • E. Raspudic
  • I. Brkic
  • M. Brmez
  • B. E. Hibbard
Article

Summary

The western corn rootworm (Diabrotica virgifera virgifera LeConte (WCR)) is a major pest of corn in USA. The pest arrived in Croatia in 1995, and today over 250.000 ha are infested. Insecticides are regularly used to control WCR, but the cost is high, can pose environmental risks, and may become ineffective due to resistance. Growing corn that is resistant to corn rootworms would be a valuable alternative to insecticides. Nine Croatian (Institute of Agriculture, Osijek) and two Pioneer Hi-Bred Int. Inc. (Johnston, Iowa, USA) commercial corn hybrids were evaluated for WCR resistance at two locations using complete randomized block design with four replications. One location was in east Croatia (Osijek) and one was in the USA (Iowa). The hybrids’ tolerance to larval feeding was rated using root injury, root regrowth and root size. Root injury was rated using the Node-Injury Scale 0–3 and evaluation of root size and root regrowth were done by scale 1–6. In an analysis of variance combined across locations, root injury didn’t show any significantly differences among hybrids, but root regrowth and root size were significantly different.

Key words

western corn rootworm root node injury root size root regrowth corn hybrids 

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Copyright information

© Akadémiai Kiadó, Budapest 2006

This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Authors and Affiliations

  • M. Ivezic
    • 1
    Email author
  • J. J. Tollefson
    • 2
  • E. Raspudic
    • 1
  • I. Brkic
    • 3
  • M. Brmez
    • 1
  • B. E. Hibbard
    • 4
  1. 1.Faculty of AgricultureUniv. of J.J. Strossmayer in OsijekOsijekCroatia
  2. 2.Department of EntomologyIowa State UniversityAmesUSA
  3. 3.Department of Maize Breeding and GeneticsInstitute of AgricultureOsijekCroatia
  4. 4.USDA-ARS, Plant Genetics Research Unit, Department of EntomologyUniv. of MissouriColumbiaUSA

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