Bayer AG ,The Dow Chemical Company ,E. I. du Pont de Nemours and Company ,Syngenta AG ,UPL . ,Nufarm Ltd ,Jiangsu Huangma Agrochemicals Co Ltd. ,Jiangsu Seven continent Green Chemical Co.Ltd. ,Hebei Veyong Bio-Chemical Co.Ltd. ,Zhejiang Yongnong Chem. Ind. Co. Ltd. .