Postemergence Grass Control in Sweet Potatoes (<i>Ipomoea batatas</i>)

Porter, Wayne C.

doi:10.1017/s0890037x00037805

Cited by 8 publications

(7 citation statements)

References 9 publications

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“…Clomazone is widely used but, when applied alone, does not offer sufficient control of Palmer amaranth (Westberg et al 1989). Clethodim, fluazifop, and sethoxydim are acetyl-coenzyme A carboxylase-inhibiting herbicides applied POST to selectively control annual and perennial grasses (Glaze and Hall 1990;Parker et al 1985;Porter 1993). Flumioxazin and S-metolachlor can be broadcast pretransplant and posttransplant, respectively, for PRE control of many broadleaf and grass weed species (Anonymous 2004a(Anonymous , 2004b(Anonymous , 2006.…”

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confidence: 99%

Herbicide-Based Weed Management Programs for Palmer Amaranth (Amaranthus palmeri) in Sweetpotato

2013

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Studies were conducted in 2010 and 2011 to determine the effect of herbicide-based Palmer amaranth management systems in ‘Covington' sweetpotato. Treatments consisted of three herbicide application times. Pretransplant applications were flumioxazin at 107 g ai ha−1, fomesafen at 280 g ai ha−1, flumioxazin at 70 g ha−1plus pyroxasulfone at 89 g ai ha−1, or no herbicide. A second herbicide application was applied within 1 d after transplanting (DAP) and consisted ofS-metolachlor at 800 g ai ha−1, clomazone at 630 g ai ha−1, or no herbicide. Two weeks after planting (WAP) plots receivedS-metolachlor at 800 g ha−1, metribuzin at 140 g ai ha−1, a tank mix ofS-metolachlor at 800 g ha−1plus metribuzin at 140 g ha−1, hand-weeding followed by (fb)S-metolachlor at 800 g ha−1, or no herbicide. Crop tolerance, Palmer amaranth control, and sweetpotato yield in systems containing fomesafen pretransplant were similar to flumioxazin-containing systems. Systems containing flumioxazin plus pyroxasulfone pretransplant resulted in increased crop stunting and decreased sweetpotato yield in 2010, compared with systems containing flumioxazin or fomesafen, but were similar to systems with flumioxazin or fomesafen in 2011. In 2010, systems containingS-metolachlor applied within 1 DAP resulted in increased sweetpotato injury, similar Palmer amaranth control, and reduced no. 1, jumbo, and total sweetpotato yield, compared with systems with clomazone. In 2011, systems containing clomazone were more injurious to sweetpotato than systems receivingS-metolachlor, but Palmer amaranth control and sweetpotato yield were similar. Systems containing metribuzin 2 WAP resulted in increased sweetpotato injury and Palmer amaranth control (in 2010) but similar no. 1 and total sweetpotato yields, compared with systems containingS-metolachlor at 2 WAP. Hand-weeding fbS-metolachlor provided greater Palmer amaranth control and no. 1 sweetpotato yield than did systems ofS-metolachlor without a preceding hand-weeding event in 2010.

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confidence: 99%

Herbicide-Based Weed Management Programs for Palmer Amaranth (Amaranthus palmeri) in Sweetpotato

2013

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“…The symptomology and activity was much more rapid (desiccation and necrosis within 3 to 5 DAT) suggesting an alternative mode or site of action than what is typically associated with acetyl-CoA carboxylase (ACCase) inhibiting herbicides. (Askew et al 2000;Evers 2001;Grichar et al 2003;Manley et al 2002;Porter 1993;Scott et al 1998). Fluazifop-P-butyl can be used in many broadleaf agronomic and horticultural crops such as chickpea (Cicer arietinum L.), cotton (Gossypium hirsutum L.), soybean [Glycine max (L.) Merr.…”

Section: Introductionmentioning

confidence: 99%

“…], and lentil (Lens culinaris Medik.) (Askew et al 2000;Grichar et al 2003;Manley et al 2001;Porter 1993;Scott et al 1998;Yasin et al 1995).…”

Section: Introductionmentioning

confidence: 99%

Characterization of Fluazifop-P-butyl Activity on Bristly Starbur (Acanthospermum hispidum)

et al. 2006

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During routine use of fluazifop-P-butyl for grass control, county extension agents in Georgia observed control of bristly starbur in grower fields. Experiments to characterize the activity of fluazifop-P-butyl on bristly starbur were conducted under greenhouse conditions in Gainesville, FL, during 2001 and 2002. Fluazifop-P-butyl activity was characterized as a function of herbicide rate and time after application. Commercially available fluazifop-P-butyl was compared to technical fluazifop-P-butyl as a function of herbicide rate and bristly starbur height. Finally, injury to bristly starbur was evaluated when clethodim, diclofop, fluazifop-P-butyl, haloxyfop, quizalofop-p, and sethoxydim were applied at two growth stages. Fluazifop-P-butyl caused >90% injury to bristly starbur with all other post graminicides displaying <8% injury. Nonlinear regression revealed a sigmoidal response of bristly starbur injury to fluazifop-P-butyl. Estimates for 50 and 90% bristly starbur injury (I50and I90) were 0.07 and 0.14 kg ai/ha, respectively. There was no difference in activity of technical and commercial fluazifop-P-butyl formulations. There was a differential response of bristly starbur to fluazifop-P-butyl over time as a function of plant height at the time of treatment. However, 14 days after treatment (DAT) all treatments displayed >89% injury. Bristly starbur response to fluazifop-P-butyl was similar to injury associated with contact-type herbicides.

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“…[2-(ethylthio)propyl]-3-hydroxy-2-cyclohexen-l-one} are labeled for sweet potato produc tion. Both are effective for selective POST control of grasses in sweet potato (5,15). No herbicides are currently registered for POST broadleaf weed control.…”

Section: Introductionmentioning

confidence: 99%

Sweet Potato (Ipomoea batatas) Clones Differ in Response to Ethyl-Metribuzin

Motsenbocker

Monaco

1995

Weed technol.

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Six commercial sweet potato clones were evaluated in field and greenhouse studies for the ethylthio analog of metribuzin (ethyl-metribuzin) tolerance. ‘Southern Delite’ was most tolerant in field studies and ‘Cordner’ the most tolerant in the greenhouse. ‘White Delite’ was the most susceptible clone in the field and greenhouse. Considering the rates used in this study, all the sweet potato clones generally were tolerant to ethyl-metribuzin. When averaged over all clones, sweet potato injury increased as the ethyl-metribuzin rate increased from 1.6 to 3.2 kg/ha but injury decreased as the season progressed and was minimal in late season. Ethyl-metribuzin did not reduce marketable yields at Clayton, NC. At Clinton, NC, ethiozin PRE, POST, or PRE followed by POST at 3.2 kg/ha or PRE at 1.6 kg/ha reduced yield.

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Postemergence Grass Control in Sweet Potatoes (Ipomoea batatas)

Cited by 8 publications

References 9 publications

Herbicide-Based Weed Management Programs for Palmer Amaranth (Amaranthus palmeri) in Sweetpotato

Herbicide-Based Weed Management Programs for Palmer Amaranth (Amaranthus palmeri) in Sweetpotato

Characterization of Fluazifop-P-butyl Activity on Bristly Starbur (Acanthospermum hispidum)

Sweet Potato (Ipomoea batatas) Clones Differ in Response to Ethyl-Metribuzin

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