The study looked at how NAA and CPPU affect avocado trees. They sprayed different treatments on the trees and found that using 30 ppm NAA + 5 ppm CPPU resulted in more fruit and less fruit drop. This combination also increased fruit weight and yield. The treatments decreased sugar levels in the leaves, showing that NAA and CPPU help move carbohydrates from leaves to fruit, reducing fruit drop and improving fruit retention.