<p>A herbicidal composition which can be improved in the effectiveness of a herbicidal active ingredient and can be applied in a smaller amount in order to reduce environmental burden on an area where a chemical is to be applied or on neighboring areas. Also provided is a method of applying the composition. The herbicidal composition contains (1) a compound represented by the formula (I): (I) (wherein T and Z have the same meanings as defined in the description) or a salt thereof and (2) a polyoxyalkylene alkyl ether phosphate or a salt thereof. The method comprises using the herbicidal composition to control an undesirable plant or inhibit the growth thereof.</p>
