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Application Timing of Herbicides for the Control of Redvine (Brunnichia ovata)

Published online by Cambridge University Press:  12 June 2017

David R. Shaw  and
Robert E. Mack
David R. Shaw
Affiliation:
Dep. Plant Pathol. Weed Sci., Miss. State Univ., Mississippi State, MS 39762
Robert E. Mack
Affiliation:
Dep. Plant Pathol. Weed Sci., Miss. State Univ., Mississippi State, MS 39762
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Abstract

Field experiments were conducted in 1986 and 1987 to determine the efficacy of various herbicides applied in the spring or fall for redvine population reductions. Spring applications of dicamba and picloram reduced redvine populations 4 mo after application. These treatments also reduced soybean density. A sequential spring followed by fall application of dicamba reduced redvine stem counts 32 to 45% the following year. Spring or spring followed by fall applications of clopyralid and hexazinone were not effective in reducing redvine populations. A fall application of clopyralid, dicamba, Dowco 433, glyphosate, or imazapyr reduced redvine regrowth 78 to 97% the following year. Dicamba at 2.2 kg ae ha-1, 3.4 kg ae ha-1 glyphosate, and 0.28 kg ai ha-1 imazapyr increased soybean yield the following year because of reduced redvine competition and lack of herbicide injury. Redvine populations were unaffected by fall applications of fosamine, hexazinone, and picloram, or clomazone applied in the spring or in the fall followed by a sequential spring application. A sequential spring followed by fall treatment of 1.1 + 1.1 kg ha-1 dicamba or 0.14 + 0.14 kg ae ha-1 clopyralid reduced trumpetcreeper population 49 to 58% the following year.

Keywords

Clomazone, 2-[(2-chlorophenyl)methyl]-4,4-dimethyl-3-isoxazolidinoneclopyralid, 3,6-dichloro-2-pyridinecarboxylic aciddicamba, 3,6-dichloro-2-methoxybenzoic acidDowco 433, 4-amino-3,5-dichloro-6-fluoro-2-pyridyloxacetic acidfosamine, ethyl hydrogen (aminocarbonyl)phosphonateglyphosate, N-(phosphonomethyl)glycinehexazinone, 3-cyclohexyl-6-(dimethylamino)-1-methyl-1,3,5-triazine-2,4(1H,3H)-dioneimazapyr, (±)-2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-3-pyridinecarboxylic acidpicloram, 4-amino-3,5,6-trichloro-2-pyridinecarboxylic acidredvine, Brunnichia ovata (Walt.) Shinners ♯ BRVCIsoybean, Glycine max (L.) Merr.trumpetcreeper, Campsis radicans (L.) Seem ex. Bureau ♯ CMIRAClomazoneclopyraliddicambaDowco 433fosamineglyphosatehexazinoneimazapyrpicloramtrumpetcreeperCampsis radicansBRVCICMIRA
Type
Research
Information
Weed Technology , Volume 5 , Issue 1 , March 1991 , pp. 125 - 129
Copyright
Copyright © 1990 by the Weed Science Society of America 

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References

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