The present invention relates to an herbicidal composition containing an oil extract as an active ingredient. The oil extract is obtained by cooling the steam containing volatile substance obtained during a wood drying step performed on a tree in the Order Pinales, or by performing an extraction with hot water or steam distillation on wood chips, saw dusts or powder flour of the tree.The herbicidal composition of the present invention has a broad herbicidal spectrum encompassing monocotyledons, dicotyledons, annual plants and perennial plants, and possesses activities for treating stems, leaves and soil (mixed soil). The herbicidal composition of the present invention can surely kill the subject weeds rapidly for a long period of time. As such, the labor and cost required for spreading the herbicide can be significantly reduced. The steam produced during a wood drying step performed on a tree in the Order Pinales or the wood chips, saw dusts or wood. flour generated during the processing of the wood, which are to be discarded, can now be recycled for further use. Further, the herbicidal composition of the present invention is a natural agent, which can lessen more environmental burden than chemical agents.本發明係關於一種除草劑組成物,該除草劑組成物係含有一種油狀萃取物做為有效成分,該油狀萃取物係藉由對屬於松柏目(Pinales)之樹木,將在材部的乾燥步驟所得之含有揮發性物質之蒸氣予以冷卻,或是將木材碎片、鋸屑、或木粉予以熱水萃取或水蒸氣蒸餾而獲得。本發明的除草劑組成物具有遍及單子葉類、雙子葉類、一年生、多年生之廣範圍的殺草譜,並且兼具莖葉處理活性與土壤(土壤混合)處理活性,可即效且長期間地將做為對象的雜草種予以確實滅除,因此,可大幅減低撒佈除草劑所需的勞力及成本。屬於松柏目(Pinales)之樹木的在材部乾燥步驟中所產生的蒸氣、或在加工該材部時所產生的木材碎片、鋸屑、或木粉係原本就要被廢棄者,而可將廢棄物再循環使用。又,本發明的除草劑組成物係天然系的藥劑,相較於化學系藥劑,可更加減低環境的負荷。
