Influence of Lactofen and 2,4-DB Combinations on Peanut Injury and Yield

Ferrell, Jason A.; León, Ramón G.; Sellers, Brent A.; Rowland, Diane; Brecke, Barry J.

doi:10.3146/ps12-15r3.1

Cited by 7 publications

(18 citation statements)

References 14 publications

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“…Peanut has been shown to be extremely tolerant to applications of 2,4-DB (Baughman et al 2002;Faircloth and Prostko Ferrell et al 2013). Surprisingly, 10% less injury was observed 21 DAIT from 2,4-DB plus acifluorfen plus bentazon reapplied at a 15 d interval compared to acifluorfen plus bentazon alone reapplied at a 15 d interval.…”

Section: Sequential Applicationmentioning

confidence: 96%

“…Another study investigated application timing of saflufenacil on peanut and found that despite foliar injury after applications (up to 34%), saflufenacil could safely be applied up to 45 d after emergence and without reducing yield (>95% of nontreated) (Morichetti et al 2012). Similarly, lactofen applied 15, 30, and 45 d after planting resulted in 29%, 22%, and 28% foliar injury 7 d after treatment, respectively, but yields were not reduced (Ferrell et al 2013).…”

mentioning

confidence: 99%

“…Also, much of the work that has been conducted using PPO-inhibiting herbicides in peanut has used single applications or sequential application spaced far apart (>2 wk) (Boyer et al 2011;Dotray et al 2012;Ferrell et al 2013;Jordan et al 1993). Therefore, the objective of this study was to evaluate the impact of sequential applications of PPO-inhibiting herbicides on the control of Palmer amaranth in peanut and the associated peanut injury and yield.…”

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confidence: 99%

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Effect of Sequential Applications of Protoporphyrinogen Oxidase-Inhibiting Herbicides on Palmer Amaranth (Amaranthus palmeri) Control and Peanut Response

Sperry¹,

Ferrell²,

Smith³

et al. 2017

Weed Technol

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Two experiments were conducted in 2013 and 2014 in Florida to evaluate the effects of protoporphyrinogen oxidase (PPO)-inhibiting herbicides and single versus sequential applications on Palmer amaranth control and peanut injury. Protoporphyrinogen oxidase-inhibiting herbicides are among the last available herbicides for the POST control of acetolactate synthase (ALS)-resistant Palmer amaranth in peanut. Lactofen (219 g ai ha -1 ) applied 5 d after the initial application provided the highest level of Palmer amaranth control 7 and 14 d after initial application (DAIT). Delaying sequential applications of lactofen to 15 d resulted in the highest level of Palmer amaranth control 21 and 28 DAIT. Similar to Palmer amaranth control, foliar injury to peanut was often highest from lactofen applications, and by 28 DAIT lactofen treatments were the only treatments that caused foliar injury. Although no statistical difference was observed between yields of plots treated with acifluorfen (280 g ai ha -1 ), bentazon (560 g ai ha -1 ), 2,4-DB (280 g ae ha) alone or in combination with each other, plots treated with sequential applications of lactofen 5 or 15 DAIT produced the lowest yields. Sequential applications of lactofen applied 15 DAIT controlled Palmer amaranth more effectively than any other treatment but also caused the highest level of peanut injury. The use of sequential applications of lactofen was the most effective method for control of Palmer amaranth in this study, but did reduce peanut yield. Nomenclature: acifluorfen; bentazon; lactofen; 2,4-DB; Palmer amaranth, Amaranthus palmeri S. Wats.; peanut, Arachis hypogaea L. Key words: ALS-resistant Palmer amaranth, sequential applications, crop injury.En 2013 y 2014 se realizaron dos experimentos en Florida para evaluar los efectos de los herbicidas inhibidores de protoporphyrinogen oxidase (PPO) y aplicaciones sencillas versus secuenciales sobre el control de Amaranthus palmeri y el daño al maní. Los herbicidas inhibidores de protoporphyrinogen oxidase están entre los últimos herbicidas disponibles para el control POST de A. palmeri resistente a herbicidas inhibidores de acetolactate synthase (ALS) en maní. Lactofen (219 g ai ha −1 ) aplicado 5 d después de la aplicación inicial (DAIT) brindó el mayor nivel de control de A. palmeri 7 y 14 DAIT. El retrasar las aplicaciones secuenciales de lactofen a 15 d resultó en el mayor nivel de control de A. palmeri 21 a 28 DAIT. Similarmente al control de A. palmeri, el daño foliar en el maní fue frecuentemente más alto con aplicaciones de lactofen, y a 28 DAIT los tratamientos con lactofen fueron los únicos que causaron daño foliar. Aunque no se observaron diferencias estadísticas entre los rendimientos de las parcelas tratadas con acifluorfen (280 g ai ha ) solos o en combinaciones entre ellos, las parcelas tratadas con aplicaciones secuenciales de lactofen 5 ó 15 DAIT produjeron los menores rendimientos. Las aplicaciones secuenciales de lactofen aplicado 15 DAIT controlaron A. palmeri más efectivamente que cualquier otro...

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Section: Sequential Applicationmentioning

confidence: 96%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Effect of Sequential Applications of Protoporphyrinogen Oxidase-Inhibiting Herbicides on Palmer Amaranth (Amaranthus palmeri) Control and Peanut Response

Sperry¹,

Ferrell²,

Smith³

et al. 2017

Weed Technol

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“…When averaged over TOD, the lactofen program was more injurious than the imazapic program (Table 6). Peanut injury from lactofen has been observed in other research ranging from 20 to 48%, with no observed yield losses (Boyer et al, 2011;Ferrell et al, 2013). However, yield losses of 5% were observed from applications of lactofen applied approximately 60 d after planting (Dotray et al, 2012).…”

Section: Resultsmentioning

confidence: 71%

Time of Day Effects on Peanut Herbicide Efficacy

Carter¹,

Prostko

2019

Peanut Science

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Recent research on the effects of time of d (TOD) when glufosinate is applied to cotton ( Gossypium hirsutum L.) and several protoporphyrinogen-inhibiting herbicides in soybean ( Glycine max L.) has growers concerned about potential TOD effects on peanut weed control. Consequently, research was conducted in 2015, 2016, and 2017 to determine if TOD influences the performance of peanut herbicides acifluorfen, bentazon, imazapic, lactofen, paraquat, and 2,4-DB. Both non- (bare-ground) and in-crop (peanut) studies were conducted. For non-crop, paraquat plus bentazon plus acifluorfen plus S-metolachlor, imazapic plus S-metolachlor plus 2,4-DB, and lactofen plus S-metolachlor plus 2,4-DB were applied to Palmer amaranth and a non-uniform mixture of annual grasses including Urochloa texana (Buckley), Dactyloctenium aegyptium (L.), Eleusine indica (L.), Digitaria spp. at 7:00, 12:00, 17:00, and 22:00 hr. For in-crop studies, two peanut weed control programs were used and herbicide programs were applied at the same TOD. Herbicides were paraquat plus acifluorfen plus bentazon plus S-metolachlor (EPOST) followed by imazapic plus S-metolachlor plus 2,4-DB, or lactofen plus S-metolachlor plus 2,4-DB (POST). For the non-crop studies, a significant interaction between TOD and herbicide program was observed for the 7 d after treatment (DAT) rating of Palmer amaranth control. Control was reduced with imazapic applied at 22:00 hr. At 14 DAT, there was no TOD effect and control was reduced with all imazapic treatments due to ALS resistance. There was no interaction between TOD and herbicide program for annual grass control. Annual grass control was unacceptable (<50%) with lactofen. For in-crop studies, there was no interaction between TOD or herbicide program. Peanut injury was lower at 7:00 hr and 22:00 hr when compared to other timings. Lactofen was more injurious to peanut than imazapic. Palmer amaranth control was not influenced by timing or herbicide program. A reduction in sicklepod control was observed at the 22:00 hr timing and with lactofen. While TOD influenced peanut injury and weed control, peanut yield was not affected.

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“…Paraquat reduced yield of the runner type peanut cultivar`York following application 21 days after cracking while application 7, 14, or 28 days after cracking did not reduce yield . Lactofen may also cause leaf necrosis and bronzing in peanut; however, this injury does not result in yield loss Ferrell et al 2013;Grichar and Dotray 2011;.…”

Section: Pyroxasulfone Tank-mixturesmentioning

confidence: 99%

Peanut Response to Postemergence Application of Pyroxasulfone

2015

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Field experiments were conducted from 2009 through 2011 to evaluate peanut tolerance to postemergence (POST) applications of pyroxasulfone applied alone or in combination with commonly used foliar herbicides. Hherbicide treatments were arranged in a factorial arrangement that included three pyroxasulfone rates (0, 240, and 480 g ai/ha) and four POST application timings [10, 30, 60, and 90 days after planting (DAP)]. Pyroxasulfone applied at 240 or 480 g ai/ ha 10 DAP caused 24 and 33% stunting 2 weeks after treatment (WAT), respectively. Regardless of pyroxasulfone rate, peanut stunting following application 30, 60, or 90 DAP was less than 3%. Peanut yield was not influenced by POST applied pyroxasulfone applied alone. In a second experiment, herbicide treatments were applied in a factorial treatment arrangement that included two pyroxasulfone rates (0 and 240 g ai/ha) and six POST herbicide systems [none; paraquat (140 g ai/ ha); paraquat (210 g ai/ha) plus bentazon (280 g ai/ha); paraquat (210 g ai/ha) plus bentazon (560 g ai/ha) plus acifluorfen (280 g ai/ha); imazapic (70 g ai/ha); and lactofen (220 g ai/ha)]. Stunting 2 WAT with paraquat applied 10 DAP ranged from 33 to 37% while less injury was observed with lactofen or imazapic. Peanut stunting 9 WAT ranged from 3 to 6% regardless of weed management system. Pyroxasulfone applied in combination with POST herbicides did not reduce peanut yield.

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Influence of Lactofen and 2,4-DB Combinations on Peanut Injury and Yield

Cited by 7 publications

References 14 publications

Effect of Sequential Applications of Protoporphyrinogen Oxidase-Inhibiting Herbicides on Palmer Amaranth (Amaranthus palmeri) Control and Peanut Response

Effect of Sequential Applications of Protoporphyrinogen Oxidase-Inhibiting Herbicides on Palmer Amaranth (Amaranthus palmeri) Control and Peanut Response

Time of Day Effects on Peanut Herbicide Efficacy

Peanut Response to Postemergence Application of Pyroxasulfone

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