| Publication date | July 25, 2018 |
|---|---|
| Sector | Agriculture, Forestry, Fisheries |
| Region name | Chugoku-Shikoku（Ehime Prefecture） |
Global warming in recent years has impacted the citrus industry in a number of ways. Warmer temperatures in spring and droughts in summer and autumn have resulted in biennial bearing (see Note); higher temperatures and heavier rainfall in autumn months have resulted in a decline in quality and higher incidences of peel puffing.
In response to the frequent occurrence of disorders due to rising average temperatures, the Tarocco is being cultivated in the Nanyo area of Ehime Prefecture, a blood orange variety that is resistant to higher summer temperatures. As a result of recent global warming, autumn has become longer and spring is arriving sooner, in addition there has been reduction of the number of winter days with temperatures below-3℃ and therefore less cold damage, which has made greater production possible (Fig. 2). In 2008 the cultivation area was 7.9 ha and production volume was 2.01t. In 2013, the cultivation area was approximately 24 ha and production volume was 140 to 150 tons, a development well-received by wholesalers.
Note: Biennial bearing means that there are alternate years of high and low yield caused by weather events or poor management.
(Source: Agricultural Technologies Dictionary NAROPEDIA, NARO)
