Use of Ethephon and Calcium Acetate to Manipulate the Foliage Retention Rates of Camphor and Golden Shower Trees

We evaluated the effect of water and ethephon (2-chloroethyl phosphonic acid) under different doses (500 mg·L−1, 1000 mg·L−1,2000 3000 mg·L−1), with without calcium acetate (CA) in two foliar applications on camphor golden shower saplings. It was aimed for to replace pruning reducing transpiration during transplantation. adopted a completely randomized design as an experimental design. An adequate dose ethephon/CA solution must be able defoliate more than 50% foliage recover 75% between 11 May 19 July. The result showed that defoliation started within one week first spray, reached lowest retention rates (LRRs) month, then re-foliated. LRRs were correlated means, but most treatments did not show statistical significance due large in-group variations among replicates. Adding CA raised alleviated dieback, especially trees. necessary trees re-foliate. final rate (FRR) influenced by dose, tree species restoration abilities. have LRR < FRR > spray mg·L−1 first, another 2000 8000 three days later.