Submitted to: Nematropica
Publication Type: Abstract Only
Publication Acceptance Date: 11/1/2007
Publication Date: 12/31/2007
Citation: Noel, G.R. 2007. Management of soybean cyst nematode, Heterodera glycines, in North America [abstract]. October 28 - November 2, 2007 Carlos Villa Paz, Argentina. Nematropica. 37:176. Interpretive Summary:
Technical Abstract: The soybean cyst nematode, Heterodera glycines, is a serious yield limiting pest in both Canada and the USA. Management of the nematode relies on crop rotation with non hosts, usually maize, and planting of resistant cultivars. However, the cropping system produces soybean every other year and exerts selection pressure on the nematode. The PI88.788 source of resistance is in the pedigree of 99% of resistant cultivars grown at present. PI88.788 resistance has been durable since it was first released, but evidence indicates that populations of H. glycines in some areas have adapted and become virulent. In addition, the level of resistance in many proprietary cultivars is not adequate to manage the nematode. Gene deployment (rotation of resistance genes from different sources of resistance) may increase durability of sources of resistance. In addition, the lower yield potential of resistant cultivars causes many producers to not practice rotation optimally. In the future, new resistance obtained from perennial soybean, Glycine tomentella and integration of biological control organisms such as Hirsutella rhossiliensis and Pasteuria nishizawae into the production system may provide sustainable soybean production that minimizes the yield-limiting effects of H. glycines. In addition to resistant cultivars and biological control, damage thresholds, planting of blends, and effects of tillage will be discussed.