PROBLEM TO BE SOLVED: To lessen the burden of work for adjusting the length of a spray boom.SOLUTION: This pest control working machine 1 includes: a first spray boom 5L and a second spray boom 5R disposed on both sides of the pest control working machine 1, respectively, and to which a plurality of nozzles for spraying chemicals are attached a GPS receiving part for receiving a radio wave transmitted from a GPS satellite and a control part for obtaining the spray starting position where the pest control working machine 1 starts to spray the chemicals to a field based on the positional information on an area of the field to spray the chemicals, and adjusting the length of at least one of the first spray boom 5L and the second spray boom 5R when the pest control working machine 1 is determined to reach the chemicals spray starting position according to the positional information of the pest control working machine 1 obtained from the GPS receiving part.COPYRIGHT: (C)2014,JPO&INPIT【課題】散布ブームの長さを調整する作業の負荷を軽減すること。【解決手段】防除作業機1は、薬剤を散布する複数のノズルが取り付けられるとともに、防除作業機1の両側にそれぞれ設けられる第1散布ブーム5L及び第2散布ブーム5Rと、GPS衛星から送信される電波を受信するGPS受信部と、圃場の薬剤が散布される領域の位置情報と薬剤の散布幅とに基づいて、防除作業機1が圃場に薬剤の散布を開始する散布開始位置を求め、GPS受信部から取得した防除作業機1の位置情報から、防除作業機1が薬剤散布開始位置に到達したと判定される場合は、第1散布ブーム5L及び第2散布ブーム5Rのうち少なくとも一方の長さを調整する制御部と、を含む。【選択図】図2
