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    JournalTurfgrass, Landscape and Urban IPM Research Summary (2)Authors
    Evans, Phillip (2)
    Gilbert, Jeff J. (2)Kopec, David M. (2)
    Pessarakli, Mohammed (2)
    Umeda, Kai (1)Ventura, Bo (1)Types
    Article (2)
    text (2)

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    USGA Distichlis Report University of Arizona Summer 2003

    Kopec, David M.; Gilbert, Jeff J.; Pessarakli, Mohammed; Evans, Phillip (College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2004-02)
    The U/A twenty-one clone saltgtrass accession nursery received a mowing height of 7/8" (or less) in 2003. In spring of 2003, clonal accessions C-8, A51, A53, and A138 produced the quickest green-up in early April. Accessions with good quality turf performance in spring/early summer included A138, A51, C-8, A65, A48, and A53. Starting in July, all plots were split with a rolling treatment (850 lb. roller, 2 passes, 2-3 times weekly) up until early October. The main effect of rolling caused increased positive responses for certain clonal accessions, others showed no response, while yet others showed decreased performance from the rolling treatment. Rolling increased positive turf responses among turf clones with showed good turf quality when not rolled. This occurred for nine of the twenty-one clones in this test, all when mowed 3 times weekly at 7/8". Accumulated rolling increased turf performance to enhanced and acceptable levels of quality (6.0 or greater) by the end of September. This was true for nine of the twenty-one clones as well. Accessions, which produced good quality turf (after rolling started in June) throughout the summer, included the following: A138, A65, A86, A137, A48, A51, and A40. Accessions which produced the best quality turfs when unrolled included A138. Likewise, turf density visual scores produced similar accession X rolling interactions. Eleven of the twenty-one clones produced a denser appearing turf after rolling, nine of which had mean visual density scores within the range of 6.3 - 8.7, when rolled. This enhanced response to rolling improved the overall appearance (turf quality) of select clonal accessions over their unrolled counterparts. Initial response to repeated rolling and lower mowing heights showed a favorable response among certain clonal accessions.
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    Response of Common Bermudagrass Sports Turf to Select Herbicides Used for Spring Transition Enhancement

    Kopec, David M.; Gilbert, Jeff J.; Pessarakli, Mohammed; Evans, Phillip; Ventura, Bo; Umeda, Kai (College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2004-02)
    Common bermudagrass often struggles with spring transition, when overseeded the previous fall with turf-type perennial ryegrass. Select herbicides were applied once on an overseeded common bermudagrass baseball field, on either an early May, or late May application in both 2003 and 2004 summer in order to evaluate their performance as an aid in spring transition. The same treatments were applied to the same plots in the two year study. The sulfonyl urea products of Tads or foramsulfuron 'Revolver', rimsulfuron 'Tranxit', trifloxysulfuron 'Monument', caused noticeable necrosis to the perennial ryegrass, which lasted up to 30 days after application, as the common bermudagrass became re-established. The other s.u. product of chlorsulfuron 'Manor', was similar to pronamid 'Kerb', which did not cause as much necrosis as the other products. However, both 'Manor' and 'Kerb' had lesser effects on transition as did the other products. This was generally true in both years. The greatest amounts of necrotic turf (percent plot straw values) occurred 30 days after application, regardless if products were applied the first week in May ('early'), or when applied the last few days of May ('late'). The e herbicide treatment main affect was significant for most turfgrass responses when herbicides were applied 'early'. This was true in both years of the study. In year 1 (2003), the 'late' application of herbicides were less effective in enhancing transition, but in year 2 (2004) the treatment affect was significant for enhancing the removal of ryegrass and enhancing the re-introduction of the underlying bermudagrass. The 'early' application program did allow for a longer bermudagrass summer season, (before the next fall overseeding) , which is deemed helpful in promoting good bermudagrass turf growth before the next overseed season Perennial ryegrass will last long into midsummer, when left untreated.
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