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| Web URL(s): | http://www.newss.org/proceedings/proceedings-2015.pdf#page=44
Last checked: 10/23/2015
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary Only |
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| Author(s): | Wolfe, J. C.;
Neal, J. C.;
Harlow, C. D. |
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| Author Affiliation: | North Carolina State University, Raleigh |
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| Title: | Control of annual grasses in turf using the bioherbicide thaxtomin A (MBI-005) |
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| Meeting Info.: | Williamsburg, Virginia: January 5-8, 2015 |
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| Source: | Proceedings of the Sixty-ninth Annual Meeting of the Northeastern Weed Science Society. Vol. 69, 2015, p. 42. |
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| Publishing Information: | College Park, Maryland: The University of Maryland |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Annual grasses; Biological herbicides; Comparisons; Control methods; Digitaria ischaemum; Herbicide evaluation; Percent weed cover; Poa annua control; Selective weed control; Weed control
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| Cultivar Names: | Thaxtomin A |
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| Abstract/Contents: | "Increasing consumer and regulatory pressure in recent years have led to increasing interest in alternatives to synthetic chemical pesticides in both the United States and abroad. However, there are currently very few non-synthetic products capable of providing selective weed control in turf. Thaxtomin A (MBI-005) is a metabolite of the bacterium Streptomyces scabies, which has been identified as a candidate for commercialization as a bioherbicide. Past research has shown that thaxtomin A functions as a cellulose biosynthesis inhibitor, providing selective preemergence and postemergence control of broadleaf weeds without damaging established turfgrass. More recent studies, however, have demonstrated that thaxtomin A can also inhibit the germination of newly-seeded grasses, suggesting it may also have the ability to control problematic annual grasses such as annual bluegrass (Poa annua) and smooth crabgrass (Digitaria ischaemum). The objectives of these studies were to determine if applications of thaxtomin A could provide equivalent control of annual bluegrass and smooth crabgrass to that of a synthetic preemergence herbicide. Experiments were conducted on a low-maintenance fairway at Thorndale Country Club in Oxford, NC in 2013 and 2014, and were initiated on March 28, 2013 and April 4, 2014 on smooth crabgrass and on September 18, 2013 and September 17, 2014 on annual bluegrass. All experiments were arranged in a randomized complete block design, with four replicates, and were evaluated monthly for weed control efficacy and percent weed cover. In 2013, treatments on both smooth crabgrass and annual bluegrass included thaxtomin A at 190 and 380 g ha-1 applied once, twice, and three times at four week intervals, along with an initial application of 380 g ha-1 followed by one and two applications at 190 g ha-1. These treatments were compared to an industry standard preemergence herbicide, pendimethalin, applied once for annual bluegrass and twice at 8 week intervals for smooth crabgrass at 1.68 kg ai ha-1. Treatments were also compared to corn gluten meal, a commercially available bioherbicide, applied twice at 8 week intervals at a rate of 980 kg ha-1. A non-treated check was also included. In 2014 treatments were added to the smooth crabgrass experiment, and included four applications of thaxtomin A applied every four weeks at 190 and 380 g ha-1, along with a treatment consisting of an initial application of 380 g ha-1 followed by three applications at 190 g ha-1 at four week intervals. Corn gluten was not included as a treatment in the 2014 experiments, as it did not control smooth crabgrass or annual bluegrass in 2013. In 2013, three applications of thaxtomin A at 380 g ha-1 provided control of smooth crabgrass equivalent to that of pendimethalin through July, but by August control in these plots had declined. In 2014, four applications of thaxtomin A at 380 g ha-1 provided similar control through the month of August, but declined in September. Three applications of thaxtomin A at 380 g ha-1 provided control of annual bluegrass equivalent to that of pendimethalin through May in the 2013 study, as did a single initial application at 380 g ha-1 followed by two applications at 190 g ha-1. This study is currently being repeated. These results suggest that thaxtomin A can be effective in providing commercially acceptable annual bluegrass control in turf. Acceptable control of smooth crabgrass can also be maintained through much of the season, but cannot be maintained throughout the entire growing season with four applications. Further study into the potential for season-long smooth crabgrass control with five or more applications is needed." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Wolfe, J. C., J. C. Neal, and C. D. Harlow. 2015. Control of annual grasses in turf using the bioherbicide thaxtomin A (MBI-005). Proc. Annu. Meet. Northeast. Weed Sci. Soc. 69:p. 42. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings-2015.pdf#page=44
Last checked: 10/23/2015
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: SB 610 .N62 |
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