PROBLEM TO BE SOLVED: To provide a method for controlling weeds in paddy fields without using a chemical herbicide and a method for controlling pollution in lakes and marshes and sewage without using chemicals. SOLUTION: A microorganism material (TTW bacillus) obtained utilizing a microbial bacterium is applied to a paddy field, lakes and marshes, sewage and the like to control weeds, pollution and the like. COPYRIGHT: (C)2011,JPO&INPIT