PROBLEM TO BE SOLVED: To provide a method for cultivating vegetables and fruits, suppressing powdery mildew by radiating a prescribed amount of infrared light to the vegetables and fruits without using an agrochemical agent.SOLUTION: Infrared light is near infrared light, and is provided with that its irradiation intensity is ≥59 μW/cm2 per the surface of the vegetables and fruits, the central wavelength as the near infrared light is in the neighborhood of 740 nm and its irradiating time is desirably all day long, that is, continuous irradiation for 24 h. The use of an LED light source or an HEFL light source is desirable in the view point of electric power consumption.COPYRIGHT: (C)2014,JPO&INPIT【課題】農薬を用いることなく、果物や野菜に赤外光を所定量照射することにより、うどんこ病の発生抑制をおこなう青果栽培方法を提供する。【解決手段】赤外光は近赤外光であって、照射強度は、青果表面あたり59μW/cm2以上であり、近赤外光としての中心波長は740nm近傍であり、その照射時間は終日すなわち24時間連続照射とすることが好ましい。また消費電力の観点からはLED光源やHEFL光源などを用いることが好ましい。【選択図】図6
