在澳大利亚的艾兰甫里园艺试验站已经证明:喷用2,4—D及赤霉素(译者注—即“九二○”)的混合剂可使晚熟脐橙的果实在树上贮藏更久,而不变坏。柑桔生产者通常是在五月初喷射16ppm的2,4—D钠盐来减少脐橙的采前落果。(译者注—澳大利亚是在南半球,那里的五月份相当我们这里的秋末冬初。) It has been demonstrated at the Allanburi Horticultural Experiment Station in Australia that the use of 2,4-D and gibberellins can cause late-maturing navel oranges to be stored on the tree even more Long, not bad. Citrus producers typically spray 16 ppm of 2,4-D sodium salt in early May to reduce navel orange plucking. (Translator’s Note - Australia is in the southern hemisphere, where May is comparable to our early autumn / winter period.)