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BAS 514 and Dithiopyr for Weed Control in Cool-season Turfgrasses

Published online by Cambridge University Press:  12 June 2017

Adrian J. Enache  and
Richard D. Ilnicki
Adrian J. Enache
Affiliation:
Crop Sci., Rutgers Univ., New Brunswick, NJ 08903
Richard D. Ilnicki
Affiliation:
Crop Sci., Rutgers Univ., New Brunswick, NJ 08903
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Abstract

Field experiments were conducted in 1986 to 1990 to determine the effect of different rates and application times of BAS 514 and dithiopyr alone and in combination on control of large crabgrass and dandelion in Kentucky bluegrass, tall fescue, and perennial ryegrass. Herbicides evaluated were applied PRE, early POST, and late POST. Results indicated that both herbicides provided excellent PRE control in all years. BAS 514 rates ranged from 0.84 to 0.56 kg ai ha-1. Rates of dithiopyr ranged from 0.43 to 0.56 kg ai ha-1. In addition to crabgrass control, both herbicides controlled dandelion, BAS 514 exhibiting slightly better activity than dithiopyr. BAS 514 at 0.84 to 1.12 kg ai ha-1 and dithiopyr at 0.26 to 0.56 kg ai ha-1 resulted in excellent early POST crabgrass control when applied at the one- to three-leaf stage of crabgrass. BAS 514 and dithiopyr applied late POST (2 to 3 tillers of crabgrass) resulted in 63 to 85% control of crabgrass and 29 to 85% control of dandelion at 10 wk after application. No weed control enhancement was evident from tank mixing the two herbicides. Excellent turf safety was demonstrated by both herbicides on all three turf species.

Keywords

BAS 514 (proposed common name quinclorac), 3,7-dichloro-8- quinolinecarboxylic aciddithiopyr, S,S-dimethyl 2-(difluoromethyl)-4-(2-methylpropyl)-6-(trifluoromethyl)-3,5-pyridinedicarbothioateKentucky bluegrass, Poa pratensis L.tall fescue, Festuca arundinacea Schrebperennial ryegrass, Lolium perenne L.large crabgrass, Digitaria sanguinalis (L.) Scop. ♯ DIGSAdandelion, Taraxacum officinale Weber in Wiggers ♯ TAROFFenoxapropDIGSATAROF
Type
Research
Information
Weed Technology , Volume 5 , Issue 3 , September 1991 , pp. 616 - 621
Copyright
Copyright © 1991 Weed Science Society of America 

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References

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