Seed Production and Control of Sicklepod (<i>Senna obtusifolia</i>) and Pitted Morningglory (<i>Ipomoea lacunosa</i>) with 2,4-D, Dicamba, and Glyphosate Combinations

León, Ramón G.; Ferrell, Jason A.; Sellers, Brent A.

doi:10.1614/wt-d-15-00108.1

Cited by 18 publications

(15 citation statements)

References 27 publications

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“…Dicamba alone and glyphosate alone treatments were not significantly different; however, pared to 45% to 77% when each was applied separately [32]. Synergism was observed when glufosinate was tank mixed with dicamba because the control observed with the tank mixture treatment was greater than the control observed from the glufosinate alone and dicamba alone treatments.…”

Section: Palmer Amaranthmentioning

confidence: 81%

Efficacy of 2,4-D, Dicamba, Glufosinate and Glyphosate Combinations on Selected Broadleaf Weed Heights

Joseph¹,

Marshall²,

Sanders³

2018

AJPS

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Palmer amaranth, sicklepod and pitted morningglory are the three most common and troublesome weeds in soybean in South Carolina. They exhibit very aggressive growth capabilities and if left uncontrolled in fields will cause significant reductions in soybean yields. Dicamba and 2,4-D herbicides are currently having a resurgence in usage due to the recent commercialization of soybean trait technologies with tolerance to these herbicides. Dicamba and 2,4-D when tank mixed with glufosinate and glyphosate may offer additional weed control to resistant weeds through the process of herbicide synergism. Greenhouse experiments were conducted in 2013 at Edisto Research and Education Center near Blackville, SC to evaluate the efficacy of glyphosate, glufosinate, dicamba and 2,4-D treatments alone and in combination on Palmer amaranth, sicklepod, and pitted morningglory at selected heights. Results suggested that glufosinate alone provided the overall best control for all 3 weed species. Glyphosate alone provided the lowest control of all 3 species at all heights. Synergism or improved sicklepod control was observed when glufosinate was tank mixed with dicamba. However, as sicklepod increased in height, glufosinate + 2,4-D or dicamba combination offered the best control compared to glufosinate alone (90% versus 86% in 20 cm plants and 87% versus 85% in 30 cm plant). In the 5 cm Palmer amaranth, decreased control was observed when glyphosate or glufosinate was tank mixed with 2,4-D. These experiments showed that glufosinate alone and/or in combination with 2,4-D or dicamba was the overall best treatment on the three broadleaf weed species.

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Section: Palmer Amaranthmentioning

confidence: 81%

Efficacy of 2,4-D, Dicamba, Glufosinate and Glyphosate Combinations on Selected Broadleaf Weed Heights

Joseph¹,

Marshall²,

Sanders³

2018

AJPS

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“…Combinations of glyphosate with 2,4-D and dicamba are commonly used for commercial weed management for control of a broad range of weed species and as a practice for mitigating weed resistance to herbicides (Leon et al 2016; Norsworthy et al 2012; Robinson et al 2012). The addition of glyphosate to halauxifen-methyl, dicamba, and 2,4-D was included to investigate the value of the common tank mixture when the target weed population contains GR biotypes.…”

Section: Resultsmentioning

confidence: 99%

Efficacy of Halauxifen-Methyl on Glyphosate-Resistant Horseweed (Erigeron canadensis)

2018

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Halauxifen-methyl is a new synthetic auxin herbicide for control of broadleaf weeds, including preplant applications for corn (Zea maysL.) or soybean [Glycine max(L.) Merr.]. The objective of this study was to investigate the efficacy of halauxifen-methyl in comparison to the current auxin standards, 2,4-D and dicamba, on glyphosate-resistant (GR) horseweed (Erigeron canadensisL.) at different plant heights. In field experiments, a foliar application of halauxifen-methyl at the recommended use rate of 5 g ae ha−1resulted in 81% control. Dicamba applied at 280 g ae ha−1provided a comparable level of efficacy of 80%, while 2,4-D at 560 g ae ha−1resulted in 49% control. The addition of glyphosate improved GRE. canadensiscontrol with 2,4-D more than with halauxifen-methyl or dicamba, possibly due to the higher level of control observed with halauxifen-methyl or dicamba alone. Even though applied at 50 to 100 times lower application rates, the efficacy of halauxifen-methyl onE. canadensiswas similar to dicamba and greater than 2,4-D. Thus, halauxifen-methyl should be an effective tool for management of GRE. canadensisbefore planting both conventional and herbicide-resistant soybean varieties, and it precludes the extended preplant application interval required for dicamba in some soybean management systems.

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“…The expected number of remaining seeds after seedling emergence was estimated based on Equation (1).…”

Section: Discussionmentioning

confidence: 99%

“…Senna obtusifolia (Sicklepod) and Xanthium strumarium (common cocklebur) are two of the most important weeds species in row cropping systems of the mid-and southeastern United States (US) [1,2] as they have the potential to become major weeds of many crops, including soybean, cotton, and maize in short time periods [3]. In addition, these species can invade and dominate pastures, roadsides, fence lines, creek banks, and other disturbed areas [4].…”

Section: Introductionmentioning

confidence: 99%

“…Leon et al [1] reported that integrated approaches which include multiple tactics and the incorporation of pre-with sequential post-application of herbicides are necessary to ensure S. obtusifolia seedbank reductions as plants that survived a single herbicide application are capable of producing abundant viable seeds. Consequently, weed management should aim at preventing weed reproduction and reducing weed emergence after crop planting [5].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Simulated Tillage in Combination with Post-Shattering Temperature Conditions on Senna obtusifolia and Xanthium strumarium Seed Survival, Seedling Emergence and Seedbank Potential

Bararpour

Korres²

2018

Agriculture

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Abstract:Two of the most troublesome weeds in soybean, cotton, and corn in cropping systems of mid-south United States (US) are Senna obtusifolia and Xanthium strumarium. Understanding their population dynamics, particularly weed seedling emergence patterns, is important for the timely implementation and the success of weed management strategies. Identifying the sources of variation of emergence patterns could greatly improve our ability to predict emergence timing. A three-years field study was conducted to determine the effect of environmental conditions on S. obtusifolia and X. strumarium seedling emergence and seedbank potential. The experiment was conducted with two seed sources; X. strumarium burs and S. obtusifolia seeds from a single maternal plant source, and X. strumarium burs and S. obtusifolia seeds from multiple maternal plant sources, both being exposed either to 5 cm burial depth (buried) or left on the soil surface (soil surface) in the fallow or planted in spring after their storage under chilled (chill) or room temperature (no chill) conditions. X. strumarium and S. obtusifolia seedling emergence was lower from burs and seeds that were planted in the soil in September as compared with the chill and/or no chill seeds/burs stored for six months. X. strumarium seedling emergence was reduced from 37 to 1% when burs were left on the soil surface when compared to buried burs. S. obtusifolia seedling emergence was reduced from 47 to 13% when seeds were left on the soil surface as compared to buried. At the end of the experimental period, the soil seedbank of X. strumarium had been significantly depleted, whereas the remaining seeds of S. obtusifolia were viable.

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Seed Production and Control of Sicklepod (Senna obtusifolia) and Pitted Morningglory (Ipomoea lacunosa) with 2,4-D, Dicamba, and Glyphosate Combinations

Cited by 18 publications

References 27 publications

Efficacy of 2,4-D, Dicamba, Glufosinate and Glyphosate Combinations on Selected Broadleaf Weed Heights

Efficacy of 2,4-D, Dicamba, Glufosinate and Glyphosate Combinations on Selected Broadleaf Weed Heights

Efficacy of Halauxifen-Methyl on Glyphosate-Resistant Horseweed (Erigeron canadensis)

Effect of Simulated Tillage in Combination with Post-Shattering Temperature Conditions on Senna obtusifolia and Xanthium strumarium Seed Survival, Seedling Emergence and Seedbank Potential

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