Preemergence Herbicide Applications to Six Containerized Woody Ornamental Rootstocks do not Affect Winter Grafting Success

摘要

Five common preemergence herbicides [Scotts OH2 (oxyfluorfen and pendimethalin), Snapshot TG (trifluralin and isoxaben), Ronstar (oxadiazon), SureGuard (flumioxazin), or Broadstar (flumioxazin)] were each applied at the highest labeled rates at 6 to 8 week intervals over the growing season to six species of container-grown seedling rootstocks. Dormant scions were bench-grafted to their respective rootstocks the following winter. Research was conducted in 2006-2007 and repeated in 2007-2008. Treatment effects were compared to non-treated control plants. Preemergence herbicide treatments had no effect on grafting success for any of the cultivars. Data indicate that these preemergence herbicides, labeled for use in container-grown nursery crops, can be used in accordance with label recommendations to control weeds in containerized rootstocks without affecting subsequent grafting success.