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POSTERS: Late Breaking I

P-671 - Development of the “Rice blast risk-forecasting and fungicide spray-timing information system”

Monday, August 4, 2025
4:30 PM - 5:15 PM HST
Location: Exhibit Hall 3

    Presenting author(s)

  • KO

    KOSUKE OTA

    Institute for Plant Protection, National Agriculture and Food Research Organization
    Tsukuba, Ibaraki, JAPAN

    • Author(s)

  • HI

    Hikari Inoguchi

    Institute for Plant Protection, National Agriculture and Food Research Organization
    Tsukuba, Ibaraki, JAPAN

  • TA

    Taketo Ashizawa

    Institute for Plant Protection, National Agriculture and Food Research Organization
    Tsukuba, Ibaraki, Japan

Abstract Text: Rice blast is the most destructive disease to rice production in Japan. However, it takes much time to get information of the disease outbreak in an objective area for farmers. Recently, we developed the web-program “Rice blast risk-forecasting and fungicide spray-timing inform system” that support faster alert of the disease risk. The system calculates risk of the blast occurrence and appropriate spray-timing of the fungicide, then sends these information by e-mail. In our system, first, we set an objective field on google map, and then select calculation period that depend on difference of the rice cultivation period, and effective fungicide. The system judges daily whether favorable conditions for blast infection using metrological data from Automated Meteorological Data Acquisition System (AMeDAS) operated by Japan Meteorological Agency. The favorable condition for blast infection is converted to risk-class values to accumulate for the e-mail alerts to support for decision-making to control the disease. The system provides two important e-mail alerts via smartphone and PC: (i) middle outbreak and (ii) severe outbreak. In addition, using the latent period of the blast infection, our system also gives the seven days faster pre-alerts. After these alerts received, farmers check their field whether the blast is present or not. Only when the blast is present in fields, farmers can spray fungicides that contributes reduction of the fungicide use.