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Reducing Apple Sunburn with Gauze Nets

Publication date July 25, 2018
Sector Agriculture, Forestry, Fisheries
Region name Chubu(Nagano Prefecture)

Adaptation activity

Extremely warm temperatures in summer (when apple fruit color), and direct sunlight can cause the skin of apples to turn white, orange or brown, and in severe cases also damage the flesh, reducing its commercial value. This is called apple sunburn, and there is concern that this will increase as global warming progresses. Protective gauze nets are being used in Nagano Prefecture to regulate exposure to sunlight and help reduce instances of sunburn.

寒冷紗設置の様子
Fig. Test of gauze nets for heat mitigation
(Source: Nōgyō Ondanka Net, "Using Gauze Nets for Reducing the Occurrence of Sunburn and Maintaining Apple Fruit Quality")
Source
Issued in May 2015 from the Nagano Prefectural Fruit Tree Exp. Stn. "Sunburn of Global Warming Ring Fruits" 464.
Relevant information
Nōgyō Ondanka Net, "Using Gauze Nets for Reducing the Occurrence of Sunburn and Maintaining Apple Fruit Quality"
https://www.ondanka-net.jp/index.php?category=measure&view=detail&article_id=426
Ministry of Agriculture, Forestry and Fisheries "2016 Global Warming Impact Survey Report"
http://www.maff.go.jp/j/seisan/kankyo/ondanka/attach/pdf/report-30.pdf
Ministry of the Environment "STOP THE warming 2017"
http://www.env.go.jp/earth/ondanka/knowledge/Stop2017.pdf
"Global Warming and Agriculture, Forestry and Fisheries" by Agricultural Environment Change Research Center Global Warming Research Office, National Institute of Agriculture and Food Industry Technology (Agriculture and Research Institute)
https://www.naro.affrc.go.jp/org/niaes/ccaff/english/