The conventional way of dealing with this problem is to spray the trees with pesticides once in April when the fruits are small, and twice more before harvesting. During last year's experiment, seven longan trees were given organic fertilizer and weren't sprayed with any pesticides.
傳統的做法是在 4 月結小果時先噴一次藥，此後到採收期間再噴 2 次；去年的實驗包括兩部分，其中 7 棵樹以有機肥和不噴藥方式栽培，風味的確香甜濃郁許多，但收獲量卻減少 1/3。