田间试验结果表明,每667m2用5%锐劲特SC 60 ml防治水稻穗期灰飞虱,药后19 d的防效为97.16%,持效期可达20d以上,极显著好于5%吡虫啉......

In this paper, the elastic solutions of concentrated force acting in orthogonal anisotropic half-plane are derived by im......