As for this invention, it cools the steam which includes the volatile substance which is obtained with dry process of the material section concerning the trees and shrubs which belong to the pine eye (Pinales), the lumber tip/chip, hot water extraction or vapor distills the sawdust (saw rubbish) and or the chip of wood it regards the herbicide composition which contains the oily extract which can as the active ingredient. The herbicide composition of this invention has the shooting grass spectrum which reaches to the range where the monad leaf-class, the dicots, first grade and perennation are wide unites foliage treatment activity and soil (soil mixture) processing activity, same it is possible to decrease labor and the cost which because you can weed precisely, require the careless grass species which is dealt with effective and in the long term for spreading the herbicide largely. In addition, the lumber tip/chip which occurs the occasion where the steam and such material section which occur the case of dry process of the material section of the trees and shrubs which belong to the pine eye (Pinales) are processed, the sawdust or the chip of wood is something which originally is abolished, recycling use of the waste is made possible.本発明は、マツ目(Pinales)に属する樹木について、材部の乾燥工程で得られる揮発性物質を含む蒸気を冷却するか、または木材チップ、おがくず(鋸屑)、あるいは木粉を熱水抽出あるいは水蒸気蒸留して得られる油状抽出物を有効成分として含有する除草剤組成物に関する。本発明の除草剤組成物は単子葉類、双子葉類、一年生、多年生の広い範囲に及ぶ殺草スペクトラムを有し、茎葉処理活性と土壌(土壌混和)処理活性を併せ持ち、即効的かつ長期的に対象とする雑草種を的確に除草できるため、除草剤の散布に要する労力やコストを大きく低減することができる。また、マツ目(Pinales)に属する樹木の材部の乾燥工程の際に発生する蒸気やこうした材部を加工する際に発生する木材チップ、おがくず、あるいは木粉は、元来廃棄されるものであり、廃棄物のリサイクル使用を可能とする。
