TY - JOUR T1 - The Efficacy of Paclobutrazol Soil Application as it Relates to the Timing of Utility Right-of-Way Pruning JF - Arboriculture & Urban Forestry (AUF) SP - 95 LP - 101 DO - 10.48044/jauf.2016.008 VL - 42 IS - 2 AU - Chris Haugen AU - Kevin Tucker AU - Alex Smalling AU - Emily Bick AU - Steve Hoover AU - Grant Ehlen AU - Todd Watson AU - Shawn Bernick Y1 - 2016/03/01 UR - http://auf.isa-arbor.com/content/42/2/95.abstract N2 - The plant growth regulator paclobutrazol’s effect on live oak trees (Quercus virginiana) was evaluated to determine optimum timing of application and pruning time in Louisiana. Variables considered included length of branch regrowth, branch distance to conductor, pruning time and biomass chipping time. Data were evaluated to determine the ideal application timing of paclobutrazol relative to time of pruning. Live oak trees treated with paclobutrazol had significantly reduced branch regrowth, pruning time and chipping time, as compared to control trees regardless of application timing. Paclobutrazol application on live oak trees was idealized within 90 days pre- to 90 days post-prune. Economically, significant gains were found by utilizing this tool ranging from 180 days pre- to 180 days post-prune, allowing for application timing flexibility to reduce the growth of trees near power lines. Paclobutrazol treated live oak trees demonstrated significantly less re-growth response. ER -