Absorption, Translocation, and Activity of CGA-136872, DPX-V9360, and Glyphosate in Rhizome Johnsongrass (<i>Sorghum halepense</i>)

Camacho, R. F.; Moshier, L. J.

doi:10.1017/s0043174500073057

Cited by 35 publications

(34 citation statements)

References 15 publications

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“…Postemergence herbicides are generally most effective when applied to immature, actively growing plants because herbicide absorption and translocation are maximized (Camacho and Moshier, 1991). This could help explain why December application of imazaquin and bispyribac-sodium provided greater control compared with February application (Table 3).…”

Section: Discussionmentioning

confidence: 99%

Postemergent Annual Bluegrass Control in Dormant Nonoverseeded Bermudagrass Turf

Toler¹,

Willis²,

Estes³

et al. 2007

horts

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Annual bluegrass (Poa annua L.) can be a troublesome weed to control in established turfgrass stands; it has developed herbicide resistance after repeated use of products with similar modes of action, and several new herbicides have been registered for use on turfgrasses. Four field studies were conducted near Clemson, S.C., from 2003 through 2005 to evaluate postemergence annual bluegrass control in dormant, nonoverseeded bermudagrass [Cynodon dactylon (L.) Pers.] turf using various herbicides applied in either December or February of each year and rated in the spring. Annual bluegrass control can be accomplished in dormant, nonoverseeded bermudagrass turf using a wide range of products applied in either December or February. Flazasulfuron, foramsulfuron, glufosinate, glufosinate + clethodim, glufosinate + glyphosate, glyphosate + clethodim, glyphosate + diquat, pronamide, rimsulfuron, and trifloxysulfuron provided 87% or greater annual bluegrass control regardless of application timing. Imazaquin and simazine controlled annual bluegrass greater than 85% when applied in December but less than 80% when applied in February. Glyphosate provided 93% annual bluegrass control when applied in February but only 72% control with December applications. No detrimental effects on bermudagrass spring greenup were observed for any herbicide treatment or application time. The availability of several effective herbicide options with differing modes of action provides turfgrass managers with the opportunity to use herbicide rotations that may prevent, or at least delay, the development of resistant annual bluegrass populations to these chemical products.

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Section: Discussionmentioning

confidence: 99%

Postemergent Annual Bluegrass Control in Dormant Nonoverseeded Bermudagrass Turf

Toler¹,

Willis²,

Estes³

et al. 2007

horts

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“…Prescribed spring burning is also assumed to enhance efficacy of a subsequent herbicide application by removing dead thatch and increasing herbicide coverage of live shoots, which improves control with contact herbicides but may or may not be important for systemic herbicides like glyphosate. Contact herbicides also are very effective when applied in spring when vegetation is actively growing, but control with systemic herbicides has been found to be most effective in the later season due to increased translocation of carbohydrates (and therefore, herbicide) to rhizomes (Sprankle et al 1975; Gottrup et al 1976; Fernandez & Bayer 1977; McIntyre & Hsiao 1982; Camacho & Moshier 1991). In addition to the above rationale for controlling P. arundinacea in spring, this timing is logistically ideal because it coincides with seasonal labor availability and other customary management schedules.…”

Section: Introductionmentioning

confidence: 99%

Increasing the Effectiveness of Reed canary grass (Phalaris arundinacea L.) Control in Wet Meadow Restorations

Adams

Galatowitsch

2006

Restoration Ecology

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Restoration practices are often based on trial and error or anecdotal information because data from controlled experiments are not available. In wet meadow restorations of the upper Midwest United States, Reed canary grass (Phalaris arundinacea L.) is controlled with spring burning and spring glyphosate herbicide applications, but the relative effectiveness of either treatment with respect to P. arundinacea growth and life history has not been assessed. We designed a multiyear field experiment to evaluate effects of burning and herbicide application timings on P. arundinacea populations. Burning did not reduce P. arundinacea biomass but reduced the P. arundinacea seed bank, potentially limiting recolonization of P. arundinacea. Glyphosate applications in late August and late September were more effective than in mid-May (due to enhanced glyphosate translocation to rhizomes), such that two mid-May applications reduced P. arundinacea biomass to a level equivalent to that achieved by one late-season application. Phalaris. arundinacea recolonized rapidly from the seed bank and, in plots that received suboptimally timed (mid-May) herbicide, from rhizomes. Establishment of native species was very low, likely due to competition with recolonizing P. arundinacea. Unplanted species (from the seed bank and refugial populations) accounted for the majority of non-P. arundinacea biomass. Recolonization of other species was strongly limited by a threshold level of P. arundinacea biomass. Adequate site preparation (over multiple growing seasons) and aftercare (selective removal of P. arundinacea) will be the key to facilitating subsequent wet meadow vegetation establishment. This research provides an example of the importance of experimental evidence as the basis to improve the efficiency of restoration practices.

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“…Alguns herbicidas necessitam de aplicações seqüenciais, feitas em plantas jovens e posteriormente em adultas, repetidas ao longo dos anos, para o bom controle de Cynodon dactylon (Grichar, 1995), sendo que o glyphosate é indicado para o seu controle. Claus & Behrens (1976) e Devine et al (1983) trabalharam com o controle de Agropyron repens; Wyrill & Burnside (1976) e Waldecker & Wyse (1985), com o de Asclepias syriaca; Camacho & Moshier (1991) e Mcwhorter & Hanks (1993), com o de Sorghum halepense, e concluíram que o glifosato mata os rizomas e suas brotações devido à sua ação sistêmica. Osipe (1995), comparando glifosato com sulfosato, na mesma dosagem (4,5 L/ha do p.c.…”

Section: Introductionunclassified

Eficácia de uma nova formulação de glifosato para o controle de grama-seda (Cynodon dactylon), em pomar de citros.

et al. 2002

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Avaliou-se a eficácia do herbicida glifosato potássico, comparado ao sulfosato e ao glifosato amínico, utilizados como padrões comerciais. Os herbicidas foram aplicados em um pomar de laranja da variedade Pêra-rio, infestado por grama-seda (Cynodon dactylon) com aproximadamente 25 cm de altura, em 70% da área. O experimento foi instalado no município de Taiúva-SP, em solo Podzólico Vermelho-Amarelo, distrófico, de textura arenosa, com relevo suave ondulado. Os tratamentos testados foram: glifosato potássico (ZAPP Qi) a 1,05; 2,10 e 2,50 kg e.a./ha, sulfosato (ZAPP) e glifosato amínico (ROUNDUP CS) a 1,98 e 2,16 kg e.a./ha, respectivamente, além da testemunha sem capina. Os herbicidas foram aplicados em pós-emergência da planta daninha, com pulverizador costal, à pressão constante (mantida por CO2 comprimido) de 2,5 kg/cm², munido de barra com seis bicos de jato plano ("leque") DG 11002, com um consumo de calda equivalente a 200 L/ha. Os melhores resultados de controle foram obtidos com 2,5 kg e.a./ha do glifosato potássico, que também garantiu menor brotação da grama-seda. No entanto, a dosagem de 2,10 kg e.a./ha deste mesmo herbicida não foi menos eficaz que o sulfosato e o glifosato, com 1,98 e 2,16 kg e.a./ha, respectivamente.

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Absorption, Translocation, and Activity of CGA-136872, DPX-V9360, and Glyphosate in Rhizome Johnsongrass (Sorghum halepense)

Cited by 35 publications

References 15 publications

Postemergent Annual Bluegrass Control in Dormant Nonoverseeded Bermudagrass Turf

Postemergent Annual Bluegrass Control in Dormant Nonoverseeded Bermudagrass Turf

Increasing the Effectiveness of Reed canary grass (Phalaris arundinacea L.) Control in Wet Meadow Restorations

Eficácia de uma nova formulação de glifosato para o controle de grama-seda (Cynodon dactylon), em pomar de citros.

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