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The Effects of PGRs on Sod Grown on Plastic Under Prolonged, No-Light Conditions

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Jacob Kilby, Ryan C Bearss, Jackie Lyn Guevara, Michigan State University & John N. Rogers


Abstract


Natural, high performance turf systems will be maintained in domed stadiums for 30-45 d during the 2026 FIFA World Cup tournament. Early- and late- gibberellic acid (GA) inhibiting plant growth regulators have been proven to reduce cultural management obligations, improve shade tolerance and improve surface characteristics of several turf species. Research was conducted at Michigan State University, in a climate-controlled room, to evaluate the effects of PGRs on cool- and warm-season turfgrasses exposed to prolonged no-light conditions. Kentucky bluegrass (Poa pratensis L.), Perennial ryegrass (Lolium perenne L.), and Hybrid bermudagrass (Cynodon dactylon L.) sod grown on plastic was treated with a single low-rate application of flurprimidol, prohexadione calcium and trinexapac-ethyl and placed in a no-light, climate-controlled environment for four weeks to emulate domed stadium conditions. Quality, NDVI and sod tensile strength of each system were evaluated weekly.


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