Navel orange is at present the most expensive, native agricultural brand. At the height of its development the total surface area devoted to Navel orange plantations doubled to 107 thousand hectares. At first the three major production areas were Anyuan, Xunwu, and Xinfeng. These three places were the first to start Navel orange production and they did so on the largest scale. Since 2012, however, these areas have suffered from a widespread outbreak of citrus greening disease, and in recent years their production volume has decreased with 70%-80%. This is according to Mr. Gu Yuanfeng of Shenzhen Mu Tian Agricultural Development Co., Ltd. At present, the entire Gannan Navel orange production area has already moved to Ningdu, Xingguo, Ruijin, and Chongyi. The main advantage of these production areas is that the weather is relatively cold, which limits the spread of citrus greening disease. Another important advantage is that after years of accumulated experience with citrus greening disease, even though it is still a citrus disease that can not be cured, farmers in all production areas have gradually deepened their understanding of this disease. They are able to adopt effective management in regular seasons for the prevention of plant diseases and insect pests, including citrus greening disease, as well as sensible use of fertilizer. As far as the nationwide, overall market conditions in 2017 are concerned, the market selling price of Navel oranges is still as strong as before. The price of 2 yuan [0.32 USD] per 0.5 kg at the beginning of the production season has increased to 3 yuan [0.48 USD] per 0.5 kg at present. The overall production volume is also relatively stable. On the one hand, Gannan Navel orange production has decreased to about 1/3 as a result of citrus greening disease. On the other hand, the Navel orange production of Hubei, Hunan, and Guangxi show significant expansion of plantations and production volume has increased substantially as a result of this expansion. Government departments continuously implement severe measures to restore the production of production areas that have suffered greatly from citrus greening disease. In the next few years, Gannan will restore and increase Navel orange production. Source - http://www.freshplaza.com