为平衡产量与果实大小之间的关系 ,生产中常常需要疏果。人工疏果时间长 ,工作量大 ,费用高 ,柑桔生产成本相应提高 ,而化学药剂疏果效率高 ,成本低。目前在澳大利亚正式注册使用的化学疏果的药剂是乙烯利 ,但由于其疏果作用太强烈 ,部分种植户认为此种药剂使用起来不可靠 ,因 To balance the relationship between yield and fruit size, production often requires thinning. Long time of manual fruit thinning, workload, high cost, the corresponding increase in the cost of citrus production, and chemical agents thinning efficiency, low cost. Currently, the drug of chemical thinning, which is officially registered in Australia, is ethephon. However, due to the strong effect of thinning, some growers think the use of such chemical is unreliable because