10/25/2023 - By Dr. Jeff Atkinson

Study: Comparing smooth crabgrass (Digitaria ischaemum) control with Dimension sparged on a 0-0-7 carrier or a POLYON 26-0-12 carrier.  

Location: East Tennessee AgResearch and Education Center, Knoxville, TN 

Investigator: Dr. Jim Brosnan and Greg Breeden 

Summary: A field trial was conducted by researchers at the University of Tennessee to investigate the effect of fertilizer carrier and fertilizer source on the efficacy of Dimension on Fertilizer for smooth crabgrass control. Fertilizer carriers included a 0-0-7 sulfate of potash blend compared to a 26-0-12 POLYON + sulfate of potash blend. Treatments were applied to a stand of common bermudagrass with germinated crabgrass at the cotyledon stage. Both Dimension treatments provided postemergence control of cotyledon stage crabgrass. Dimension applied on a 26-0-12 POLYON blend provided better crabgrass control than Dimension applied on a 0-0-7 blend 24 WAT.

Figure 1. Smooth crabgrass control following application of Dimension on various fertilizer blends. Treatments were applied on 13 March 2023. Different letters between treatments within a rating date indicate a statistically significant difference at the α=0.05 level. WAT = Weeks After Treatment. East Tennessee AgResearch and Education Center, Knoxville, TN.

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