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| Web URL(s): | http://www.newss.org/proceedings/proceedings_1997_vol51.pdf#page=49
Last checked: 07/24/2013
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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): | Neal, J. C. |
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| Author Affiliation: | Assoc. Proffesor, Department of Horticultural Science, North Carolina State University |
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| Title: | Preemergence control of prostrate knotweed |
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| Meeting Info.: | Newport, RI; January 6-9, 1997 |
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| Source: | Proceedings of the 51st Annual Meeting of the Northeastern Weed Science Society. Vol. 51, 1997, p. 49. |
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| Publishing Information: | College Park, MD: Northeastern Weed Science Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Application timing; Herbicide efficacy; Herbicide evaluation; Polygonum aviculare; Preemergence weed control
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| Abstract/Contents: | "Prostrate knotweed (Polygonum aviculare L. #POLAV) is a common weed in turfgrass thinned due to compaction, traffic, athletic use or pest damage. It is difficult to control postemergently with available herbicides and is best controlled preemergently. Although, commonly associated with hot, drought-prone sites, prostrate knotweed germinates very early in the spring -- typically before preemergent herbicides are applied. In my previous research, many preemergent herbicides labeled for prostrate knotweed control failed to provide adequate control in golf course fairway turf when applied in early spring. In this study, we investigated the effectiveness of late fall applications of labeled herbicides as compared to spring treatments for preemergence control of prostrate knotweed. Herbicides were applied on November 30, 1995 or April 12, 1996 to a predominantly Poa annua and perennial ryegrass (Lolium perenne) golf course fairway mowed at 1/2 inch. November applications were about 7 weeks after the last mowing for the season. April treatments were only 2 days after snow cover had melted from the plots but prostrate knotweed seed had already germinated; most of the germinated seed were on the soil surface and the primary roots had not yet penetrated the soil surface. The soil surface and 2 inch depth temperatures at the time of spring treatments were 53 F and 45 F, respectively. The herbicides applied included prodiamine (Barricade) at 0.75 and 1.1 lb ai/A, isoxaben (Gallery) at 0.75 and 1.0 lb ai/A, and pendimethalin (Pre-M) at 1.5 lb ai/A. Late fall applications of each herbicide controlled prostrate knotweed better than spring overseeding was evaluated. In that test, prodiamine and isoxaben were applied on November 30, 1995 at the same rates as in the prostrate knotweed study. The area was treated with Roundup on May 1 and silt seeded with perennial ryegrass on May 9, 1996. Plots were rated once a month. Prodiamine reduced turfgrass cover-- by 70% in July ratings. By the end of August turfgrass had partially recovered with only 20-33% reduction in cover from 0.75 and 1.1 lb ai/A, respectively. In contrast, isoxaben caused no stand reduction in June or August ratings. In July ratings, a slight (18%) reduction was observed with 1.0 lb/A isoxaben. In August 1996 ratings, other weeds from seed controlled by November applications of isoxaben at 0.75 lb/A included creeping woodsorrel, (Oxalis corniculata), broadleaf plantain (Plantago major) and white clover (Trifolium repens) from seed. These data showed that several herbicides were effectively controlled prostrate knotweed when applied in late fall, including prodiamine, pendimethalin and isoxaben. But only isoxaben did so without interfering with spring overseeding." |
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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):
Neal, J. C. 1997. Preemergence control of prostrate knotweed. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 51:p. 49. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings_1997_vol51.pdf#page=49
Last checked: 07/24/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: SB 610 .N62 v. 51 |
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