Estimation of virulence type and level of soybean cyst nematode field populations in response to resistant cultivars
J. W. Zheng1,2 and S. Y. Chen1*
1Southern Research and Outreach Center, University of Minnesota, Waseca, MN 56093; USA.
2Institute of Biotechnology, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310029, P. R. China.
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