Weed control using granular herbicides on container-grown ornamentals

Laura M. Miller, Juanita Popenoe, Robert H. Stamps, Raymond Miller, Darin Lickfeldt


Snapshot, Showcase, OH2, Rout, BroadStar, Dimension and Treflan, were applied in November/December 2004 in randomized block trials on Viburnum odoratissimum growing in 3-gallon containers at a nursery in Sumter County and Quercus virginiana growing in 5-gallon containers at a nursery in Hillsborough County. Hand-weeded and untreated controls were additional treatments. Applications were made to the shrubs with a broadcast spreader to dry foliage and individually to pots for the trees, followed by application of 0.5 to 0.75 inches of irrigation water. Weed control was measured in January/February and March/April 2005. Results varied somewhat between nurseries, but all herbicides provided some weed control compared to untreated controls. Hand-weeding once during mid-season was as effective as pre-emergent herbicides on the trees.


quercus virginiana; viburnum odoratissimum; preemergence weed control; weeding times

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Proc. Fla. State Hort. Soc.     ISSN 0886-7283