Harpin protein is a natural plant compound that can stimulate plant defense responses. And N-Hibit™ is a seed-treatment containing harpin protein that is sold in the United States for management of the soybean cyst nematode (SCN). Iowa State University Extension evaluated the effects of N-Hibit™ seed treatment on soybean yield and SCN population densities in nine field experiments located throughout Iowa in 2007 and in nine different field experiments in 2008. The work was supported by the soybean checkoff through funds from the Iowa Soybean Association
