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| Web URL(s): | http://newss.org/proceedings/proceedings_2009.pdf#page=79
Last checked: 07/17/2013
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Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Author(s): | Derr, J. F. |
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| Author Affiliation: | Virginia Tech, Virginia Beach |
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| Title: | Weed control and ornamental tolerance to mesotrione |
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| Section: | Ornamentals
Other records with the "Ornamentals" Section
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| Meeting Info.: | Baltimore, Maryland: January 6-8, 2009 |
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| Source: | Proceedings of the Sixty-Third Annual Meeting of the Northeastern Weed Science Society. Vol. 63, 2009, p. 64. |
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| Publishing Information: | Baltimore, Maryland: Northeastern Weed Science Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Cyperus esculentus; Digitaria ciliaris; Digitaria ischaemum; Eleusine indica; Impatiens walleriana; Mesotrione; Ornamental plants
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| Abstract/Contents: | "Mesotrione has recently been developed for use in golf courses and sod farms, with additional turf uses expected. Ornamentals could be exposed to this herbicide when it is applied to turf areas. Trials were conducted to evaluate the tolerance of bedding plants and woody nursery crops to mesotrione. In a field trial, mesotrione applied either prior to or after transplanting at 0.125 or 0.25 lb ai/A caused significant visible injury, ranging from 10 to 80%, depending upon rate, to marigold (Tagetes erecta L.), vinca [Catharanthus roseus (L.) G. Don], gazania [Gazania rigens (L.) Gaertn], salvia (Salvia splendens Sellow ex Roem. & Schult. ), and lanceleaf coreopsis (Coreopsis lanceolata L.) 17 DAP. Significant reduction in flowering was noted in all species except vinca 30 days after planting. Mesotrione applied POST once at 0.25 lb/A gave excellent control of smooth [Digitaria ischaemum Schreb. Ex Muhl.] and southern crabgrass [Digitaria ciliaris (Retz.) Koel.], good control of goosegrass, [Eleusine indica (L.) Gaertn.] and a significant reduction in yellow nutsedge (Cyperus esculentus L.) stand. The same rate applied PRE did not provide acceptable control of crabgrass or goosegrass. In a similar trial conducted in containers, mesotrione at 0.25 lb/A caused 45% or greater injury to gazania, verbena [Verbena canadensis (L.) Britton], lanceleaf coreopsis, and impatiens (Impatiens walleriana Hook.), with less injury to vinca (18%) 28 DAT. In another field trial, mesotrione caused severe injury to forsythia (Forsythia x intermedia Zabel) with both directed and overtop applications, with moderate to severe injury to variegated privet (Ligustrum sinense Lour ) depending on rate and number of applications. Injury to azalea ranged from 14 to 23% at 41 days after treatment. A single POST application of mesotrione at 0.125 and 0.25 lb/A gave fair and excellent control of yellow nutsedge 9 DAT, but yellow nutsedge control was not acceptable at 41 DAT. Two applications of mesotrione gave good to excellent yellow nutsedge control, significantly higher than that seen with a single application. A single POST application at 0.125 or 0.25 lb/A gave excellent control of smooth and southern crabgrass and goosegrass. Single and repeat applications of mesotrione injured yellow foxtail [Setaria glauca (L.) Beauv.], but this species was able to outgrow the injury. Fall panicum (Panicum dichotomiflorum Michx.) infested all mesotrione-treated plots. Two directed spray applications of mesotrione at 0.125 or 0.25 lb/A caused approximately 15 to 25% injury to azalea (Rhododendron obtusum L.), hydrangea (Hydrangea macrophylla L.), flowering dogwood (Cornus florida L.), and daylily (Hemerocallis spp.) 27 DAT, with greater injury to butterfly bush (Buddleia davidii Franch.), redbud (Cercis canadensis L.) and marigold. Single applications resulted in less injury. Injury generally decreased by 65 DAT, except in butterfly bush and marigold. Two POST applications of mesotrione at 0.125 or 0.25 lb/A gave good to excellent control of yellow nutsedge, while single application gave unacceptable control 27 DAT. Nursery crops and annual grasses vary in their tolerance to mesotrione. Root uptake appears to be an important mode of exposure in nursery crops. Two POST applications of mesotrione provide good to excellent control of yellow nutsedge, goosegrass, and crabgrass species." |
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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):
Derr, J. F. 2009. Weed control and ornamental tolerance to mesotrione. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 63:p. 64. |
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| Web URL(s):
http://newss.org/proceedings/proceedings_2009.pdf#page=79
Last checked: 07/17/2013
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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