PROBLEM TO BE SOLVED: To locally effectively spray a liquid agent depending on a crop growth condition in a field in a liquid agent spraying apparatus for spraying a liquid agent while moving in the field.SOLUTION: A liquid agent spraying apparatus 1 includes a first tank 2, a second tank 3, a spray nozzle 4, a first pump 5, a suction channel 10 for connecting the first tank 2 to the suction side of the first pump 5, a force feed channel 11 for connecting the force feed side of the first pump 5 to the spray nozzle 4, a second liquid supply route 20 that is connected to the joining part 17 of the suction channel 10 and supplies a second liquid W2 of the second tank 3 to the suction channel 10, a second pump 6 provided on the second liquid supply route 20, a control part 7 that controls the flow rate of the force feed channel 11 at a set flow rate and controls the mixing ratio of a first liquid W1 to the second liquid W2 at a set ratio and a local spray switch 8 for driving the second pump 6 at a set number of revolutions in order to locally mix and spray the second liquid W2 in a set concentration.COPYRIGHT: (C)2014,JPO&INPIT【課題】圃場内を移動しながら液剤散布を行う液剤散布装置において、圃場内の作物生育状況に応じて局所的に効果的な液剤散布を行う。【解決手段】液剤散布装置1は、第1タンク2と、第2タンク3と、散布ノズル部4と、第1ポンプ5と、第1タンク2と第1ポンプ5の吸引側を接続する吸引流路10と、第1ポンプ5の圧送側と散布ノズル部4を接続する圧送流路11と、吸引流路10の合流部17に接続されて第2タンク3の第2液体W2を吸引流路10に供給する第2液体供給路20と、第2液体供給路20に設けられる第2ポンプ6と、圧送流路11の流量を設定流量に制御すると共に第1液体W1と第2液体W2の混合比を設定比に制御する制御部7と、局所的に第2液体W2を設定濃度で混合散布するために、第2ポンプ6を設定回転数で駆動する局所散布スイッチ8を備える。【選択図】図1
