PROBLEM TO BE SOLVED: To provide appropriate countermeasures against late autumn frost damage in orchards which is recently an urgent task due to global warming and/or climate change.SOLUTION: A present invention comprises a frost protection fan which blows down air or air of an inverted layer of an orchard, and/or a net stretched over the orchard, or an orchard warm air machine, and a temperature sensor, and a control panel provided in an orchard. The set temperature and the current temperature are compared and frost damage in the late autumn is avoided by using the frost protection fan/net/warm air machine.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】近時、果樹園では、温暖化、及び/又は、気候変動から、晩秋の凍害回避を図ることが急務であり、適当な対策が望まれている。【解決手段】本願発明は、果樹園に配備した、果樹園の空気、又は逆転層の空気を吹降ろす防霜ファン、及び/又は、果樹園に張装するネット、或いは果樹園の温風機と、温度センサと、制御盤とでなり、設定温度と現状温度とを比較し、防霜ファン・ネット・温風機とを利用して、晩秋の凍害回避を図る。【選択図】図1
