The Brazilian citrus industry consists of approximately 195,275,000 trees planted on 1,010,229 acres on nearly 5,885 farms. In 2000, the average tree number per acre was 148. This figure increased to around 222 in 2010, and today it is at approximately 265 tees per acre.. The incidence of HLB by tree age group is: 0 to 2 years, 2 percent HLB infected; 3 to 5 years, 7 percent; 6 to 10 years, 19 percent; and more than 10 years, 26 percent. Time from infection to HLB-symptom development is generally less than one year.