The influence of winter annual grass litter on herbicide availability

Clark, Shannon L.; Silva, Paulo Vinícius da; Dayan, Franck E.; Nissen, Scott J.; Sebastian, Derek J.

doi:10.1017/wsc.2019.45

Cited by 20 publications

(19 citation statements)

References 51 publications

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“…These results corroborate Clark et al (2019), who applied indaziflam on straw of Bromus tectorum and performed simulations of rainfall and found that a greater amount of the herbicide was intercepted when the applied on large amounts of straw, and the recovery of indaziflam intercepted in the straw was greater when the rainfall simulation occurred immediately after application of the product and with greater amounts of simulated rainfall.…”

Section: Control Of Urochloa Plantaginea By Indaziflam In Different Asupporting

confidence: 85%

Indaziflam: Leaching and control of Urochloa plantaginea in applications on coffee litter with different rainfall simulations

Silva

Santos

Tronquini

et al. 2020

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Coffee litter and the rain that occurs after the application of pre-emergence herbicides impact on their leaching and weed control effectiveness. The objective of this study was to evaluate the leaching and control effectiveness of indaziflam, applied on coffee litter, and under simulations of different amounts of rainfall. Two experiments in greenhouse were conducted with the application of indaziflam (0.1 kg of active ingredient - a.i. - ha-1), in a completely randomized design. The first involved the leaching of the herbicide using Urochloa plantaginea as a bioindicator, in a 8 x 4 factorial arrangement, with eight depths in the PVC column (0-0.05; 0.05-0.1; 0.1-0.15; 0.15-0.2; 0.2-0.25; 0.25-0.3; 0.3-0.35; 0.35-0.4 m) and four amounts of straw (0; 1; 3 and 5 t ha-1), this factor was isolated for rainfall simulations (10, 20 and 40 mm). The second experiment tested the effectiveness in controlling U. plantaginea, in a 4 x 3 factorial arrangement, with four amounts of litter (0; 1; 3 and 5 t ha-1) and three amounts of rainfall (10, 20 and 40 mm). Both experiments had four repetitions and controls without application of the herbicide. In leaching, a greater effect of indaziflam was found at a depth of 0-0.05 m, and the higher the simulated rainfall, the greater the phytotoxicity observed in U. plantaginea, with 39.75%, 52.50% and 92.06%, for rainfall amounts of 10, 20 and 40 mm, respectively. U. plantaginea showed high susceptibility to control by the herbicide indaziflam, and the lowest control, 82%, was observed when indaziflam was applied on 5 t ha-1 with simulation of rainfall at 10 mm. The increase in the amount of litter on the soil surface, combined with lower amounts of rainfall can reduce the leaching of indaziflam and the control of U. plantaginea.

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Section: Control Of Urochloa Plantaginea By Indaziflam In Different Asupporting

confidence: 85%

Indaziflam: Leaching and control of Urochloa plantaginea in applications on coffee litter with different rainfall simulations

Silva

Santos

Tronquini

et al. 2020

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“…Herbicide efficacy can be improved with litter removal by fire (DiTomaso et al 2006). Herbicide interception by B. tectorum litter can be as high as 74% to 84% (Clark et al 2019a;Kessler et al 2015). Due to differences in water solubility, imazapic and rimsulfuron are almost completely released from litter with as little as 12 mm of rainfall, while <50% of indaziflam is released from litter with 24 mm of rainfall (Clark et al 2019a).…”

Section: Introductionmentioning

confidence: 99%

“…Herbicide interception by B. tectorum litter can be as high as 74% to 84% (Clark et al 2019a;Kessler et al 2015). Due to differences in water solubility, imazapic and rimsulfuron are almost completely released from litter with as little as 12 mm of rainfall, while <50% of indaziflam is released from litter with 24 mm of rainfall (Clark et al 2019a). This suggests that indaziflam binds strongly to litter (Carbonari et al 2016;Clark et al 2019a).…”

Section: Introductionmentioning

confidence: 99%

Prescribed burning followed by indaziflam enhances downy brome (Bromus tectorum) control

Seedorf

Clark

Nissen

2022

Invasive plant sci. manag.

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B. tectorum (Bromus tectorum L.) is a highly invasive winter annual grass that can fill open niches in native plant communities. Prescribed burning is often used to control B. tectorum and can be combined with herbicide treatments to extend the duration of control and promote the native plant community. Several herbicides have been evaluated in conjunction with burning for B. tectorum control, although the herbicide indaziflam has not. In September 2017, two B. tectorum infested sites were burned in Colorado foothill shrublands. In March 2018, indaziflam was applied alone or in combination with glyphosate, rimsulfuron, or imazapic. These treatments were compared to imazapic plus glyphosate as a standard. All treatments were made within burned and non-burned areas in a crossed-nested design. Bromus tectorum cover and the desirable plant community responses were evaluated one and two years after treatment (YAT). In non-burned areas, all indaziflam treatments reduced B. tectorum cover compared to the control. In contrast, reductions from the imazapic treatments did not persist after the first year. Most post-burn treatments further decreased B. tectorum cover compared to the non-burned treatments. The most effective treatments (indaziflam 44 and 73 g ai ha−1 + imazapic 123 g ae ha−1) provided similar levels of control (< 1% B. tectorum cover 2 YAT), with or without burning. Desirable plant cover, richness, and diversity were not negatively impacted by burning or herbicide treatments. Plant diversity and species richness increased at Site 2 when burning was followed by indaziflam treatments. This study indicates that B. tectorum control using indaziflam can be enhanced when applied after burning, and the combinations with imazapic or rimsulfuron provide a wider application window compared to the combination with glyphosate.

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“…É o caso de flumioxazin (solubilidade: 0,786 mg L -1 e log Kow: 2,55) (IUPAC, 2020) que apresentou um baixo controle de A. hybridus quando não foi realizada a dessecação complementar. Na ausência de chuvas significativas, herbicidas com baixa solubilidade e log Kow elevado tendem a ficar retidos na palha e não atingir o solo (CARBONARI et al, 2019;CLARK et al, 2019). Dessa forma a ação destes herbicidas pode ter sido comprometida, já que dependem do contato e absorção das moléculas pelas estruturas das plântulas em emergência (KRAUSZ; KAPUSTA; MATTHEWS, 1998;NIEKAMP;JOHNSON;SMEDA, 1999;CLEWIS;WILCUT;PORTERFIELD, 2006;MEYERS et al, 2010).…”

Section: Experimento IV -Programas De Manejo De Amaranthus Hybridus Aunclassified

MANEJO DE Amaranthus hybridus EM ÁREA DE INTEGRAÇÃO LAVOURA-PECUÁRIA NA REGIÃO SUL DO RIO GRANDE DO SUL

Martins¹,

Munhos²,

Vighi³

et al. 2020

RBHerbicidas

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A área cultivada com soja aumentou no Brasil nos últimos anos, assim como sua produção total. No Rio Grande do Sul (RS) o cultivo da leguminosa também mostra crescimento, sendo utilizado na sucessão à pecuária de corte no período frio, modelo de produção que contribui para melhor utilização das áreas durante os 12 meses do ano, contribuindo assim para o incremento da renda do produtor, bem como, quando bem manejado, colaborar no manejo integrado de plantas daninhas. Apesar disso, a presença de plantas daninhas dicotiledôneas de difícil controle como Amaranthus hybridus em lavouras de soja do RS vêm aumentando. Assim, o objetivo deste estudo foi avaliar a eficiência de herbicidas pré- e pós-emergentes, e de diferentes programas de manejo para controle de populações de Amaranthus hybridus. O estudo foi composto por quatro experimentos, dois sob condições controladas em casa de vegetação e dois a campo, em uma propriedade rural no município de Cerrito, RS, que integra a produção de soja com pecuária de corte. Os experimentos evidenciaram que alguns biótipos são tolerantes ao glyphosate e aos herbicidas inibidores de ALS (imazethapyr e chlorimuron-ethyl), e que a utilização dos herbicidas pré-emergentes imazethapyr + flumioxazin, metribuzin, s-metolachlor e sulfentrazone + diuron contribui para o manejo destes biótipos. Verificou-se também que a dessecação do azevém e sua complementação com herbicidas de contato e o uso de pré-emergentes são fatores determinantes para o controle de A. hybridus. Ainda, os resultados apontam que em condições de déficit hídrico, a presença de palha prejudica a eficiência de alguns herbicidas pré-emergentes.

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The influence of winter annual grass litter on herbicide availability

Cited by 20 publications

References 51 publications

Indaziflam: Leaching and control of Urochloa plantaginea in applications on coffee litter with different rainfall simulations

Indaziflam: Leaching and control of Urochloa plantaginea in applications on coffee litter with different rainfall simulations

Prescribed burning followed by indaziflam enhances downy brome (Bromus tectorum) control

MANEJO DE Amaranthus hybridus EM ÁREA DE INTEGRAÇÃO LAVOURA-PECUÁRIA NA REGIÃO SUL DO RIO GRANDE DO SUL

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