<P>PROBLEM TO BE SOLVED: To provide a method for readily and effectively promoting the production of a latex by a latex-producing plant. ??<P>SOLUTION: (1) The method for increasing the production of the latex by the latex-producing plant includes planting jasmine at the vicinity of the plant. (2) The method for increasing the production of the latex described in (1) includes regulating the distance between the plant and the jasmine so as to be ≤3.5 m. (3) The method for increasing the production of the latex described in (1) or (2) includes regulating the plant so as to be Hevea brasiliensis. ??<P>COPYRIGHT: (C)2010,JPO&INPIT ??