Preemergence Herbicides Affect Hybrid Bermudagrass Nutrient Content
2015
Jones, Patrick A. | Brosnan, James T. | Kopsell, Dean A. | Armel, Gregory R. | Breeden, Gregory K.
Preemergence (PRE) herbicides negatively impacting turfgrass root growth may compromise macro- and micronutrient accumulation in foliar tissue. Research was conducted to determine the effects of indaziflam (35 and 52.5 g ha ⁻¹), prodiamine (0.84 kg ha ⁻¹), oxadiazon (3.36 kg ha ⁻¹), and isoxaben (1.12 kg ha ⁻¹) applications in hydroponic culture on hybrid bermudagrass [ C. dactylon (L.) Pers. x C. transvaalensis Burtt-Davy] tissue nutrient content. Prodiamine, indaziflam, and isoxaben reduced visual root mass relative to non-treated plants. Consequently, these herbicides reduced phosphorus (P), sulfur (S), and potassium (K) content in turf foliar tissue. Treatment with indaziflam reduced magnesium (Mg) and manganese (Mn) content in turf foliar tissue compared to non-treated plants. This response was not observed with prodiamine and could explain the significant foliar injury (>70%) observed with both rates of indaziflam. Data in the current study illustrate that PRE herbicide applications affect hybrid bermudagrass nutrient content. Future studies should evaluate foliar applications of Mg and Mn for either preventing or remediating leaf tissue injury following PRE herbicide application.
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