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| Web URL(s): | http://www.newss.org/proceedings/proceedings-2014.pdf#page=124
Last checked: 10/05/2015
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Author(s): | Smith, A. N.;
Askew, S. D.;
Hackman, G. S. |
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| Author Affiliation: | Virginia Tech, Blacksburg, VA |
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| Title: | Postemergence and residual crabgrass control with cavalcade PQ in cool-season turf |
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| Section: | Turfgrass and plant growth regulators - Session II
Other records with the "Turfgrass and plant growth regulators - Session II" Section
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| Meeting Info.: | Philadelphia, Pennsylvania: January 6-9, 2014 |
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| Source: | Proceedings of the Sixty-eighth Annual Meeting of the Northeastern Weed Science Society. Vol. 68, 2014, p. 124. |
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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: Broadleaf weeds; Combination treatments; Cool season turfgrasses; Crabgrass control; Herbicide evaluation; Herbicide trials; Postemergence weed control; Prodiamine + Quinclorac; Quinclorac; Residual effects; Weed control
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| Trade Names: | Cavalcade PQ |
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| Abstract/Contents: | "Quinclorac is a postemergence control option for crabgrass in cool-season turfgrass. Preemergence products containing quinclorac allow some flexibility in application by combining preemergence residual control with early postemergence crabgrass control from quinclorac. Products containing prodiamine and quinclorac were compared for efficacy against smooth crabgrass (Digitaria ischaemum (Schreb.) Schreb. ex Muhl.) and broadleaf weeds. Two trials were initiated in fairway height perennial ryegrass (Lolium perenne L.) on June 12 and July 9 2013. On June 12, smooth crabgrass was 3-4 leaf stage. On July 9, smooth crabgrass was 1-2 tiller stage. Treatments were as follows: Cavalcade (prodiamine) at 0.73 kg ai ha-1 , Cavalcade PQ (prodiamine + quinclorac) at 1.68 kg ai ha-1, quinclorac at 0.84 kg ai ha-1, dithiopyr at 0.57 kg ai ha-1, Cavalcade PQ at 1.34 kg ai ha-1, and Cavalcade PQ at 1.34 kg ai ha-1 with methylated seed oil (MSO). A nontreated check was included for comparison. Crabgrass control was rated 1, 2, 4, 6, 8, 12, and 16 weeks after treatment (WAT). In 3-4 leaf stage crabgrass, initial control was excellent for all products containing quinclorac. At 2 WAT, products containing quinclorac controlled crabgrass 91% or better. The best control was 100% from Cavalcade PQ + MSO and quinclorac alone. Dithiopyr controlled crabgrass 25%. At 4 WAT, products containing quinclorac controlled crabgrass 99% or better. Dithiopyr controlled crabgrass 94%. At 8 WAT, quinclorac alone and dithiopyr controlled crabgrass 78%. Cavalcade did not provide sufficient control. Cavalcade PQ at both rates and with MSO controlled crabgrass 94-98%. The same treatments controlled white clover 100% and common dandelion 88-98%. At 12 WAT, all Cavalcade PQ treatments controlled smooth crabgrass 90% or better. Quinclorac alone and dithiopyr controlled crabgrass 79 and 70%, respectively. In 1-2 tiller crabgrass, dithiopyr and Cavalcade provided minimal crabgrass control; only treatments containing quinclorac controlled crabgrass. At 1 WAT, quinclorac alone and Cavalcade PQ controlled crabgrass 81-86%. At 2 WAT, crabgrass control ranged from 81-93%. Cavalcade PQ at 1.68 kg ai ha-1 controlled crabgrass 93%. At 4 WAT, crabgrass control ranged from 73-89%. Quinclorac alone controlled crabgrass 86%. Cavalcade PQ at 1.34 kg ai ha-1 controlled crabgrass 73%. Cavalcade PQ at 1.34 kg ai ha-1 + MSO and Cavalcade PQ at 1.68 kg ai ha-1 controlled crabgrass 88 and 89%, respectively. For 6, 8, and 12 WAT, treatments maintained similar control across dates. Cavalcade PQ at 1.68 kg ai ha-1 and at 1.34 kg ai ha-1 + MSO averaged 80-81% control. Quinclorac alone averaged 76-77%. Cavalcade at 1.34 kg ai ha-1 without MSO controlled crabgrass 60-70%. These results suggest that the inclusion of MSO to Cavalcade PQ at a lower rate can provide sufficient control of smooth crabgrass and can significantly increase crabgrass control when applied to more mature crabgrass." |
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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):
Smith, A. N., S. D. Askew, and G. S. Hackman. 2014. Postemergence and residual crabgrass control with cavalcade PQ in cool-season turf. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 68:p. 124. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings-2014.pdf#page=124
Last checked: 10/05/2015
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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