[problem] as the leaves dry state of the plant, to reduce the occurrence of mold and disease, to provide a spray device which performs photosynthesis good. In CPU100 of A sequencer 10 to perform the spray control program 112. Temperature in House 90 is measured by a temperature sensor 30, solar radiation is measured by the solar radiation sensor 32, it is captured as measurement data 124. CPU 100 obtains the cumulative data 126 from the measurement data 124 by integrating the solar radiation. When the integrated value of the amount of solar radiation reaches the set value of the set spray start in setting data 122, carry out the spray send a drive signal from the CPU100 relay circuit 52A, to 52B. In this case, the amount of solar radiation value (instantaneous value) and the temperature is taken into account in the spray time, when there is strong solar radiation increases the amount of spray, on the contrary, when the weak solar radiation is to reduce the amount sprayed, after spray plant leaves look like dries of, is reduced the occurrence of mold and disease, photosynthesis is performed well.FIELD 1【課題】植物の葉が乾く状態となるようにして、カビや病気の発生を低減し、光合成を良好に行う噴霧装置を提供する。【解決手段】シーケンサ10のCPU100で噴霧制御プログラム112を実行する。ハウス90内の温度は温度センサ30で測定され、日射量は日射センサ32で測定されて、測定データ124として取り込まれる。CPU100は、測定データ124から日射量を積算して積算データ126を得る。日射量の積算値が設定データ122で設定された噴霧開始の設定値に達すると、CPU100からリレー回路52A,52Bに駆動信号を送って噴霧を行う。この場合に、噴霧時点における日射量の値(瞬時値)及び温度が考慮され、日射が強いときは噴霧量を増やし、逆に、日射が弱いときは噴霧量を減らすことで、噴霧後の植物の葉が乾くようになり、カビや病気の発生が低減され、光合成が良好に行われる。【選択図】図1
