Download or read book Annual Bluegrass Poa Annua L Control and Turfgrass Response to Amicarbazone written by Daniel Hunter Perry and published by . This book was released on 2011 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Poa Annua written by J. M. Vargas, Jr. and published by John Wiley & Sons. This book was released on 2003-12-19 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annual bluegrass is the most widespread turfgrass species maintained on intensively cultured turf. Indeed, most of the top golf courses in the world have greens composed, at least in part, of this type of turfgrass There have historically been conflicting beliefs as to why many golf courses have problems with annual bluegrass populations during the summertime months. Through analysing the industry's latest research and pest control technologies the author helps put to rest this debate and offers methods for growing and maintaining healthy annual bluegrass. Written by leading experts in their field, this book contains many colour photographs and is a practical guide for golf course and turgrass specialists.
Download or read book Use of Mesotrione for Annual Bluegrass Poa Annua L at Cool season Turfgrass Establishment written by Katelyn A. Venner and published by . This book was released on 2011 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annual bluegrass is a problematic weed in highly maintained turfgrass environments, and is difficult to control due to its adaptability to highly maintained turfgrass environments and lack of highly effective chemical control options. Mesotrione is a relatively new herbicide which has been found to show some level of control of annual bluegrass, and is safe to use at cool season turfgrass establishment. Thus, mesotrione has potential to be utilized for weed control in cultivated sod production. The objectives of this research were to evaluate mesotrione to determine: 1) tolerance of selected tall fescue cultivars, an important turfgrass species cultivated for sod, to applications of mesotrione; 2) the length of residual of mesotrione versus prodiamine, bensulide and dithiopyr for control of annual bluegrass; and 3) potential of mesotrione to control winter annual broadleaf weeds at Kentucky bluegrass establishment. Tall fescue cultivars were found to be tolerant to mesotrione applications made preemergence and preemergence plus 4 weeks after emergence at higher rates than required for weed control. Significant cover reductions were only observed at the 1.12 kg ha-1 application rate of mesotrione, which is four times the highest labeled rate for weed control. There was little difference in the response of the seven tall fescue cultivars iii evaluated suggesting minor intraspecific variability between tall fescue cultivars to mesotrione. When applied to bare ground, mesotrione provided 48% annual bluegrass control in the fall and annual bluegrass control decreasing to 20% in the following spring. Prodiamine, bensulide and dithiopyr provided much greater levels of annual bluegrass control and high levels of control were maintained into the following spring. These results suggest that although mesotrione has some activity on newly germinating annual bluegrass it is much lower relative to prodiamine, bensulide and dithiopyr. Mesotrione was found to be more effective for winter annual broadleaf weed control when applied POST compared to PRE. For overall winter annual broadleaf weed control mesotrione should be applied PRE at rates of 0.21 kg ha-1 or higher and POST at 0.14 kg ha-1 or higher. The results of these studies demonstrate that mesotrione is safe for use in newly seeded tall fescue and previous studies have shown similar findings with Kentucky bluegrass. The safety of mesotrione to these two economically important turfgrass species widely grown for cultivate sod combined with its ability to control winter annual broadleaf weeds and suppress annual bluegrass demonstrate that is a new and valuable component to an overall weed control program in cultivated sod production.
Download or read book Annual Bluegrass Poa Annua L Control in Turf with Ethofumesate written by Carol J. Maggard and published by . This book was released on 1983 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Factors Influencing Competition of Annual Bluegrass Poa Annua L Within Established Turfgrass Communities and Seedling Stands written by James Edward Bogart and published by . This book was released on 1972 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Annual Bluegrass Poa Annua L Control with Ethofumesate During Turfgrass Establishment written by David L. Wieneche and published by . This book was released on 1988 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Temperate climates are particularly conducive to growth of annual bluegrass which readily invades and dominates most cool-season turfgrasses. Ethofumesate (2-ethoxy-2,3-dihydro-3,3-dimethyl-5-benzofuranyl methanesulfonate) is one herbicide available which will selectively control annual bluegrass. The primary objectives of this research were to determine optimum application rates and timing of ethofumesate for control of annual bluegrass on sites renovated by three different techniques. In addition, tolerance of common turfgrass cultivars was determined. Ethofumesate rates of 0.5, 1.0, 1.5 kg ai/ha, and split repeat treatments of 0.5 kg ai/ha applied twice or three times, applied preemergence, or early postemergence at the one and two leaf stage relative to perennial ryegrass were tested. Protected Least Significant Difference mean separation statistical analysis was used to determine differences at the 5% level. Differences were observed between ryegrass and tall fescue cultivars in greenhouse ethofumesate tolerance studies but not in field trials. Ethofumesate greenhouse cultivar tolerance differences did not correlate to results of field trials. All perennial ryegrass and tall fescue cultivars tested in field trials tolerated ethofumesate well at all rates. There was an initial 1 month period of growth suppression following ethofumesate application which perennial ryegrass and tall fescue appeared able to recover and annual bluegrass was not. Annual bluegrass was controlled in all trials at 0.5, 0.5 X 2, 0.5 X 3, 1.0, and 1.5 kg ai/ha ethofumesate rates and at all stages of application. Annual bluegrass reduction ranged between 83% to 100%. Perennial ryegrass cultivars Palmer, Blazer, Loretta, Dasher, and Regal, tall fescue cultivar Mustang, and 'America' Kentucky bluegrass tolerated ethofumesate. Red fescue, hard fescue, chewings fescue, roughstalk bluegrass, colonial bentgrass, and annual bluegrass did not tolerate ethofumesate. In the three establishment methods studied, annual bluegrass control was 100% in the no-till followed by surface scarification and broadcast seeding, 97.3% in the till trials with broadcast seeding, and 83% in the no till slicer seeder method.
Download or read book Changes in Poa Annua Populations in Response to Herbicides and Plant Growth Regulators written by Jesse Brown and published by . This book was released on 2013 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: Poa annua (annual bluegrass; ABG) is an invasive weedy species in turfgrass. Herbicides and plant growth regulators (PGRs) are often used for ABG control, providing limited or inconsistent results. Identifying shifts in ABG populations in response to these treatments would be beneficial for understanding inconsistent control. Our research employed amplified fragment length polymorphic (AFLP) markers with the objective to determine if there are changes in genetic structure of ABG populations after multiple-year season-long control programs in three states. Annual bluegrass was sampled after the second or third year of seven different season-long ABG treatments consisting of herbicide or PGR applications. The trials were conducted at three different locations (East Lansing, Michigan; West Lafayette, Indiana; Lincoln, Nebraska). In the ABG samples, AFLP markers were identified for each site and 649, 745, and 762 were produced for Michigan, Indiana and Nebraska, respectively. Population analysis was conducted in Structure and identified five distinct ABG populations in Michigan, seven in Indiana, and six in Nebraska. Season-long treatments of trinexapac-ethyl or bispyribac-sodium (bispyribac) at a low rate effected genetic structure of populations at all locations. However, ABG populations that were affected by an individual herbicide or PGR did not respond consistently among locations. Bispyribac treatments increased ABG population variability in Michigan, but decreased variability in Indiana and Nebraska. Trinexapac-ethyl treatments decreased ABG population variability in Michigan and Indiana, but increased variability in Nebraska. This study provides a genetic basis in understanding how herbicides or PGRs impact ABG populations over the long term and our results may help explain inconsistencies in chemical control of ABG.
Download or read book Management of Annual Bluegrass Poa Annua L Using Post emergence Herbicides and Plant Growth Regulators written by John B. Haguewood and published by . This book was released on 2014 with total page 101 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annual bluegrass (Poa annua L.) is a problematic weed species found in many turfgrass stands, particularly golf course putting greens. This weed is light green in color, has poor heat and drought tolerance, and produces many seeds making it undesirable on putting greens. The objectives of this research were to: a) investigate the use of the herbicide bispyribac-sodium alone or in combination with plant growth regulators for annual bluegrass control and putting green tolerance; b) determine the efficacy of plant growth regulators on annual bluegrass seedhead suppression when applied once, or followed by a sequential application; and c) determine how chemicals applied at different growth stages of annual bluegrass effect shoot growth and seedhead development. Field and greenhouse research was conducted during 2010, 2011, 2012 and 2013 at multiple golf courses throughout central Missouri. Treatments of bispyribacsodium alone or in combination with paclobutrazol demonstrated safety to putting greens with high levels of annual bluegrass control (90%). For seedhead suppression, treatments containing ethephon were most effective, resulting in up to 95% suppression of seedheads. Regardless of plant stage during application, annual bluegrass biomass was reduced 19 and 31% following applications of ethephon + trinexapac-ethyl or paclobutrazol, respectively.
Download or read book Annual Bluegrass Poa Annua L written by and published by . This book was released on 1978 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Amicarbazone written by Matthew Donnel Jeffries and published by . This book was released on 2012 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Annual Bluegrass Poa Annua L and Its Requirements for Growth written by Howard Bennett Sprague and published by . This book was released on 1937 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Phytotoxicity of Preemergence Herbicides Used to Control Annual Bluegrass Poa Annua L on Overseeded Bermudagrass Turf written by Robert Harold Walker and published by . This book was released on 1969 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Response of Different Growth Forms of Poa Annua L Annual Bluegrass to Herbicides Applied Before Or After Emergence written by and published by . This book was released on 1980 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Role of 7 oxybicyclo 2 2 1 heptane 2 3 dicarboxylic Acid endothall in Annual Bluegrass Poa Annua L Control in Turf written by Alfred J. Turgeon and published by . This book was released on 1971 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fenarimol for Control of Annual Bluegrass in Dormant Bermudagrass Turf written by B. J. Johnson and published by . This book was released on 1988 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Growth and Reproduction of Annual Bluegrass Poa Annua in Response to Trinexepacethyl Or Prohexadione calcium at Multiple Rates and Application Timings written by Matthew T. Faletti and published by . This book was released on 2004 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Field experiments were conducted in 2002 and 2003 in the Willamette Valley of Oregon to investigate the effects of two plant growth regulators on the growth and reproduction of the weed annual bluegrass. Previous research suggested that the plant growth regulator prohexadione-calcium hastened senescence of annual bluegrass. Another plant growth regulator, trinexepac-ethyl has been used for suppression of annual bluegrass seedheads in turf. Plant growth regulators were applied in either split or single applications in March, April or May at five field sites over two years. Annual bluegrass biomass, seed yield, thousand seed weight, seed germination, and panicles per plant were measured as well as crop yield. No treatment provided satisfactory annual blugrass control when applied in either single or split applications at rates within the range suggested by the manufacturers for increased crop yield. Controlled environment trials also were conducted to evaluate the growth regulating properties of trinexepac-ethyl on annual bluegrass plants. Results of dose response experiments were similar to those of field trials. Annual bluegrass biomass was not consistently decreased with increasing rates of trinexepac-ethyl. Treated plants had fewer spikelets per panicle and fertile florets per spikelet compared to untreated controls. Although spikelets per panicle and fertile florets per spikelet were reduced, increased seed production may be obtained due to increased numbers of panicles per plant.
Download or read book The Role of 7 oxabicyclo 2 2 1 heptane 2 3 dicarboxylic Acid Endothall in Annual Bluegrass Poa Annua L Control in Turf written by Alfred J. Turgeon and published by . This book was released on 1971 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
