Weed Control in Soybean with Imazethapyr Applied Alone or in Tank Mix with Saflufenacil/Dimethenamid-P

Walsh, Kimberly D.; Soltani, Nader; Shropshire, Christy; Sikkema, Peter H.

doi:10.1614/ws-d-14-00076.1

Cited by 19 publications

(17 citation statements)

References 21 publications

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“…Also, fomesafen provided ≥86% control of yellow foxtail, green foxtail, and barnyardgrass 40 DAPRE (Table 4). Walsh et al (2015) also reported acceptable grass control (≥75%) and improved soybean yields with PRE application of PPO herbicides in a tank mix with imazethapyr. Moreover, imazethapyr in mixtures with PPO herbicides and metribuzin provided complete control of green foxtail at two weeks after soybean emergence (Belfry et al, 2016).…”

Section: Grass Weed Controlmentioning

confidence: 87%

“…Results showed the effective broad‐spectrum weed control when premixes from Group 2 (ALS‐inhibitors), Group 5 (Photosystem II [PSII]‐inhibitors), Group 14 (protoporphyrinogen oxidase [PPO]‐inhibitors), and Group 15 (long‐chain fatty acid‐inhibitors) herbicides. Similarly, others reported that PRE application of PPO herbicides tank‐mixed with ALS‐inhibiting herbicides provided an effective control of broadleaf species (Belfry et al, 2015; Walsh et al, 2015); including kochia, Russian thistle ( Salsola tragus ), field bindweed ( Convolvulus arvensis ), velvetleaf, common lambsquarters, and yellow sweetclover ( Melilotus officinalis ) in Nebraska (Knezevic et al, 2009). Hausman et al (2013) also reported that PRE‐applied metribuzin and flumioxazin alone provided 92% waterhemp control at 60 DAPRE in soybean.…”

Section: Broadleaf Weed Controlmentioning

confidence: 98%

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Weed Control in Soybean with Preemergence‐ and Postemergence‐applied Herbicides

Oliveira

Feist²,

Eskelsen³

et al. 2017

Crop Forage & Turfgrass Mgmt

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Core Ideas Herbicide premixes provided good (>90%) broadleaf and grass weed control in Nebraska. Preemergence‐applied herbicide premixes with different sites of action will help manage resistance weeds. Preemergence‐applied herbicides should be a foundation for weed management in soybean. In the past 20 years, weed control in soybean (Glycine max) was mainly based on postemergence (POST) applications of glyphosate, which resulted in glyphosate‐resistant weeds. Herbicide‐resistant weeds warrants evaluation of new strategies for effective control. Therefore, the objective of this study was to evaluate the performance of herbicides applied preemergence (PRE) and POST on 11 agronomic weeds in eastern Nebraska. The study was conducted in 2014 and 2015 in Concord, NE. The best PRE‐applied treatments were metolachlor + imazethapyr, fomesafen + imazethapyr, flumioxazin + imazethapyr, and flumioxazin + metribuzin, which controlled broadleaf and grass weed species ≥90 and ≥80%, respectively. However, weed control with POST herbicides was more variable, ranging from 19 to 91%. The POST‐applied fomesafen and fomesafen + imazethapyr controlled ivyleaf morningglory (Ipomoea hederacea), common lambsquarters (Chenopodium album), common waterhemp (Amaranthus tuberculatus), and redroot pigweed (Amaranthus retroflexus) ≥85%. Greater soybean yields were achieved with most PRE‐applied herbicides and POST‐applied fomesafen + imazethapyr only. Metolachlor + imazethapyr, metolachlor, and fomesafen applied PRE protected soybean yields better than when applied POST. Results suggested that PRE‐applied herbicide mixtures of different sites of action are the base for controlling weeds and protecting soybean yields in eastern Nebraska.

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Section: Grass Weed Controlmentioning

confidence: 87%

Section: Broadleaf Weed Controlmentioning

confidence: 98%

Weed Control in Soybean with Preemergence‐ and Postemergence‐applied Herbicides

Oliveira

Feist²,

Eskelsen³

et al. 2017

Crop Forage & Turfgrass Mgmt

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“…ha -1 (Belfry et al, 2015). The application of imazethapyr, molecule that belongs to the ALS inhibitor group, has also caused injuries in soybean (Walsh et al, 2015).…”

Section: Resultsmentioning

confidence: 99%

Application of Post-Emergence ALS Inhibitor Herbicides Associated or Not to Glyphosate in RR/STS Soybean

Silva

Albrecht

et al. 2016

Planta daninha

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-The aim of this study was to evaluate the selectivity of ALS inhibitor herbicides, applied isolated and associated with glyphosate in post-emergence of soybean cultivar presenting the RR/STS technologies. The experimental design was a randomized block with four replications and ten treatments. The treatments consisted of the application of glyphosate and ALS inhibitors herbicides, isolated and associated with glyphosate. The application of treatments occurred in V4 stage of plant development. The evaluation of phytointoxication, SPAD index was conducted, as well as variables related to agronomic performance (height, number of pods per plant, yield and mass of a thousand seeds). Yet additional test with the same cultivar and treatment was conducted in a greenhouse in a completely randomized design with four replications. Soybean cultivar CD 2630 RR/STS presented itself tolerant to application in post-emergence herbicides used alone or combined with glyphosate. Except to metsulfuron-methyl (2.4 g a.i. ha -1 ), associated or not with glyphosate (960 g a.e. ha -1 ).Keywords: sulfonylurea tolerant soybeans, phytointoxication, chemical management, Glycine max. Palavras-chave: soja tolerante as sulfoniluréias, fitointoxicação, manejo químico, Glycine max. RESUMO -O objetivo do presente trabalho foi avaliar a seletividade de herbicidas inibidores da ALS, aplicados isoladamente e associados com glyphosate, em pós-emergência de cultivar de soja contendo as tecnologias RR/STS. O delineamento experimental foi de blocos casualizados, com quatro repetições e dez tratamentos. Os tratamentos foram constituídos da aplicação de glyphosate e herbicidas inibidores da ALS, isolados e associados com glyphosate. A aplicação dos tratamentos

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“…Moreover, in soyabean, imazethapyr applied PRE at a dose of 100 g a.i. ha −1 reduces the density and weight of C. album , Ambrosia artemisiifolia (common ragweed), S. viridis (green foxtail) and Abutilon theophrasti (velvetleaf) by up to 80% (Walsh et al ., ). In another study, imazethapyr applied PRE at a dose of 0.067 kg a.i.…”

Section: Discussionmentioning

confidence: 97%

“…Imazethapyr is an acetolactate synthase (ALS)‐inhibiting herbicide and belongs to the imidazolinone group registered for use in soyabean at 75–100 g a.i. ha −1 (Walsh et al ., ). Imazethapyr controls a wide range of grass and broad‐leaved weeds and can be applied in pre‐plant, pre‐plant incorporated (PPI), PRE and POST treatments (Cantwell et al ., ).…”

Section: Introductionmentioning

confidence: 97%

Effects of different management practices on Portulaca oleracea emergence in soyabean

et al. 2019

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Summary Portulaca oleracea (common purslane) is a summer annual weed with wide geographic distribution and is problematic in many crops worldwide. Field experiments were conducted to determine the effects of different management practices on P. oleracea emergence in soyabean fields. Two tillage systems [conventional tillage (CT) and no‐till (NT)], three soyabean seeding rates (SR) (200 000, 300 000 and 400 000 seeds ha−1) and three imazethapyr doses (0, 50, and 100 g a.i. ha−1 applied pre‐emergence) were considered as experimental factors. Portulaca oleracea emergence was affected by management practices including tillage system, soyabean SR and imazethapyr dose. Conventional tillage required a thermal time (TT) of 195.95 and 221.30 d °C to reach 50% emergence in 2016 and 2017, respectively, while for NT, the respective TT requirements were 182.34 and 203.32 d °C. On increasing soyabean SR from 200 000 to 400 000 seeds ha−1, the TT requirements for 50% emergence (T50) of P. oleracea also increased. The T50 at the herbicide dose of 100 g a.i. ha−1 was 193.05 and 220.67 d °C in 2016 and 2017, respectively, while for the non‐herbicide treatment, the respective TT requirements were 165.98 and 202.94 d °C. From an integrated weed management perspective, a combination of CT with a SR of 400 000 seeds ha−1 and a 100 g a.i. ha−1 imazethapyr dose not only resulted in the lowest P. oleracea seedling density m−2 but also caused the longest delay in the time to reach the T50. Findings from our study may facilitate the development of effective P. oleracea management strategies.

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Weed Control in Soybean with Imazethapyr Applied Alone or in Tank Mix with Saflufenacil/Dimethenamid-P

Cited by 19 publications

References 21 publications

Weed Control in Soybean with Preemergence‐ and Postemergence‐applied Herbicides

Weed Control in Soybean with Preemergence‐ and Postemergence‐applied Herbicides

Application of Post-Emergence ALS Inhibitor Herbicides Associated or Not to Glyphosate in RR/STS Soybean

Effects of different management practices on Portulaca oleracea emergence in soyabean

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