柑桔具有产量高、品质好、耐贮运、效益高等特点,故已成为我区栽培广、发展快、产量多的果树种类。据1989年统计,柑橙面积达171.71万亩,占我区水果总面积438.3万亩的39.18%。但柑橙总产量仅有31.4万吨,占全区水果总产量87.4万吨的35.93%。按总面积计平均亩产仅有180kg。按投产面积(66.79万亩)计,亩产也仅有470kg。我区柑桔产量如此之低的原因很多,其中最主要的原因之一是我区大部分地区遭受柑桔黄龙病的危害, Citrus has a high yield, good quality, storage and transportation, high efficiency, it has become a wide range of cultivated areas in our region, the rapid development and output of more types of fruit trees. According to the statistics of 1989, citrus orange area reached 1,717,100 mu, accounting for 39.18% of the total area of ​​4,383,000 mu of fruit in our district. However, the total output of orange is only 314,000 tons, accounting for 35.93% of the total output of 874,000 tons of fruit in the region. According to the total area of ​​?? average per mu only 180kg. According to the commissioning area (667,900 mu), per mu is only 470kg. There are many reasons why the output of citrus in our region is so low, one of the most important reasons is that most parts of our region suffer from citrus Huanglongbing,