Monday, December 10, 2007 - 10:29 AM

Evaluation of Serbian commercial corn hybrids’ tolerance to feeding by larval western corn rootworm (Diabrotica virgifera virgifera LaConte)

Stephanie Rose Kadlicko, and Jon T. Tollefson, Iowa State University, Department of Entomology, 13 Insectary, Iowa State University, Ames, IA

The first western corn rootworm (Diabrotica virgifera virgifera LeConte (WCR)) beetle was reported in Serbia in 1992 and since then has spread across much of Europe. Classical breeding techniques offer an opportunity to develop maize lines that are resistant to the pest. This would avoid the need for costly insecticide treatments or planting genetically modified varieties, which are prohibited to be grown in Europe. Twelve Serbian (Maize Research Institute, Zemun Polje) commercial corn lines were evaluated for WCR resistance by Iowa State University (Ames, Iowa) using a complete randomized block design replicated four times over multiple seasons. The roots were rated using a relative comparison of root size (1-6 scale), root injury (0-3 scale), and root re-growth (1-6 scale and weight). The data and their analyses are the foundation of another project that will use the hybrids parental lines, in combination with exotic germplasm (USA), to develop maize lines adapted to Central Europe.

Species 1: Coleoptera Chrysomelidae Diabrotica virgifera (western corn rootworm)
Species 2: Poales Poaceae Zea mays (corn)