Simulation Study on Long-Lasting Effectiveness of S-Methoprene on Tribolium Species and Activity of Detoxification Enzyme oleh LI Yan-yu, HU Tie-yuan, JIANG Xue, XIE Bing-bing, WANG Sen-shan, SONG Li-wen, ZHANG Hong-qing, MU Hai-liang, WANG Ming-liang