PROBLEM TO BE SOLVED: To develop a novel liquid agent spraying method and liquid agent spraying device capable of effectively acting a liquid agent (chemical solution) on the back of tea leaves, for example, in insect prevention and epidemic prevention work. SOLUTION: The liquid agent spraying device 1 of the present invention includes a liquid agent spraying machine 3 and a support 2 attached so that the liquid agent spraying machine 3 can be moved, of which the liquid agent spraying machine 3 is a tea ridge crown surface layer. A spraying means 31 having a spraying body 313 that rotates while in contact with the portion, and a liquid agent supply unit 32 that supplies the liquid agent L to the spraying means 31 or the upper surface of the tea ridges are provided, and the liquid agent L is supplied from the liquid agent supply unit 32 while spraying. The spraying main body 313 of the means 31 is rotated and contacted with respect to the work progress direction so as to stroke the tea leaves A on the ridges from behind, and the liquid agent L is sprayed on the tea ridges T to fertilize and prevent insects from the target tea ridges T. It is characterized by performing. [Selection diagram] Fig. 1【課題】 本発明は、例えば防虫防疫作業において、茶樹の葉裏にも効果的に液剤（薬液）を作用させ得るようにした新規な液剤散布方法と液剤散布装置の開発を技術課題とする。【解決手段】 本発明の液剤散布装置１は、液剤散布機体３と、この液剤散布機体３を移動できるように取り付けた支持体２とを具え、このうち液剤散布機体３は、茶畝樹冠表層部に接しながら回転する散布本体３１３を有する散布手段３１と、散布手段３１または茶畝上面に液剤Ｌを供給する液剤供給部３２とを具え、液剤供給部３２から液剤Ｌを供給しながら、散布手段３１の散布本体３１３を作業進行方向に対し、畝頂の茶葉Ａを後方から撫で上げるように回転接触させ、液剤Ｌを茶畝Ｔに散布し、目的とする茶畝Ｔの施肥・防虫防疫を行うことを特徴とする。【選択図】図１
