Influence of soybean row width and velvetleaf emergence time on velvetleaf (Abutilon theophrasti)

Hock, Shawn M.; Knežević, Stevan Z.; Martin, Alex; Lindquist, John L.

doi:10.1614/ws-04-122r

Cited by 12 publications

(16 citation statements)

References 27 publications

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“…Overall the seedlings that were emerged earlier produced additional biomass. These outcomes were confirmed by the findings of Massinga et al 2001, Puricelli et al 2002and Hock et al, 2005 Leaf areas of velvetleaf plants accumulated in the third and fourth layer 77 % and 71 % for the 50cm-row and 36-cm-row soybean respectively, an average in both years. The highest leaf accumulation area in the upper strata's of the velvetleaf canopies indicates higher efficiency in competition for intercepting the light in comparison with the soybean.…”

Section: Resultssupporting

confidence: 62%

“…Researches have showed that velvetleaf plants which emerged 35 days after soybean planting did not decrease crop yield significantly (Zimdahl, 1988). This indicates the importance of time of velvetleaf seedlings emergence for their survival (Hock et al, 2005), the same was proved also for Digitaria sanguinalis (L.). (Gallart et al, 2010;Oreja and dela Funte.…”

Section: Resultssupporting

confidence: 62%

“…This approach has demonstrated the relevance and importance of weed mortality and decline of the weeds fitness (Williams et al, 1998). It is a combination of various methods by cultural, chemical and mechanical means (Swanton et al, 2008) as well as agronomical operations which also play a vital role (Pylon et al, 1997;Hock et al, 2005). Articles on the timing and placement of fertilizer, seeding rate and reducing crop row spacing have been studied and reported by Walker and Buchanan, (1982).…”

Section: Introductionmentioning

confidence: 99%

“…For the future success and development of integrated weed management (IWM), further biological studies of the various weeds inhibiting the soybean culture is necessary. Velvetleaf is a serious and troublesome weed of the soybean in the north of Iran and a global dilemma (Shafigh et al, 2006;Rezvani et al, 2008;Sadeghi et al, 2003;Warwick and Blank, 1988;Hock et al, 2005;Zeinali and Ehteshami 2003). The majority of the velvetleaf seedlings sprouted at the beginning of the season and some emerged midseason (Egley and Williams, 1991).…”

Section: Introductionmentioning

confidence: 99%

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Study of relationship between soybean (Glycine max (L.) Merr.) planting spatial arrangements and velvetleaf (Abutilon theophrasti L.) population dynamic

Salehian

Najafian

2015

AAS

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The velvetleaf is an important annual weed in the Mazandaran province, Iran. Seeds are the only way of propagation and renewal of this weed. More knowledge was gained regarding soil seed bank and its seed production to improve the management of the velvetleaf weed in the future. There is a minimal information concerning the impact of the soybean planting pattern on the dynamics of the velvetleaf population. For this reason two different fields have been studied with the cooperation of the Agriculture Discipline of the Islamic Azad University, in Qaemshahr, Iran, during 2009 and 2012. In this study the effect of two types of soybean row spacing were used, 50 cm-wide and 36 cm-narrow, and three emergences of the velvetleaf weed population (periods 0-10, 10-20 and 20-30 days after soybean sowing were implemented) were studied. Seed production, leaf area and dry matter increased in each plant population of the velvetleaf weed in the 50-cm soybean rows. Mortality rates were decreased in velvetleaf's seedling population in the wider spaced rows. By observation it was seen an increased production of seeds in the first batch of seedlings. It appears that we must remove the first weed emergence flushes within three to four weeks after the soybean emergence to prevent reduced yields in the soybean crop and further increase of the velvetleaf seed bank.

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Section: Resultssupporting

confidence: 62%

Section: Resultssupporting

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Study of relationship between soybean (Glycine max (L.) Merr.) planting spatial arrangements and velvetleaf (Abutilon theophrasti L.) population dynamic

Salehian

Najafian

2015

AAS

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“…Practices that improve soyabean competitive ability can be a useful part of an integrated weed management (IWM) programme (Pyon et al. , 1997; Hock et al. , 2005) and a viable option to reduce herbicide applications.…”

Section: Introductionmentioning

confidence: 99%

Interactions between reduced rate of imazethapyr and multiple weed species–soyabean interference in a semi‐arid environment

Yousefi¹,

González‐Andújar²,

Mohammad-Alizadeh³

et al. 2012

Weed Research

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Yousefi AR, Gonzalez‐Andujar JL, Alizadeh H, Baghestani MA, Rahimian H & Karimmojeni H (2012). Interactions between reduced rate of imazethapyr and multiple weed species–soyabean interference in a semi‐arid environment. Weed Research.52, 242–251. Summary Field experiments were conducted to evaluate Xanthium strumarium and Amaranthus retroflexus competitive ability with soyabean under unsprayed and sprayed (half the recommended rate of imazethapyr) conditions. Weed density combinations of 0, 4, 8 or 12 plants m−1 of row for A. retroflexus and 0, 2, 4 or 8 plants m−1 of row for X. strumarium were established alone, and in all possible combinations. When X. strumarium and A. retroflexus were grown at the same density, X. strumarium contributed 60–69% of the total weed biomass depending on weed density. The half rate of imazethapyr reduced the biomass of both weed species by 90% as compared with untreated plots. Untreated A. retroflexus and X. strumarium reduced soyabean yields to 1911 kg and 1656 kg ha−1, respectively, while with the reduced rate of herbicide, the yield only decreased to 3612 kg and 3453 kg ha−1 respectively. The total weed density required to cause a 5% soyabean yield loss was 0.16 and 0.32 plants m−1 of row with no‐herbicide treatment, while with the half rate of imazethapyr, it increased up to 2.78 and 4.32 plants m−1 in 2007 and 2008 respectively. Owing to the higher competitive ability of X. strumarium, it should be given a greater priority for control than A. retroflexus in soyabean grown in a semi‐arid environment. The half rate of herbicide significantly decreased the competitive ability of X. strumarium and A. retroflexus indicating that, in soyabean, application of this rate might be more cost‐effective and more environment‐friendly than the recommended ones.

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Integrating fall‐planted cereal rye cover crop with herbicides for reducing Palmer amaranth seed production in soybean under planting green conditions

Stephens,

Blanco‐Canqui,

Knezevic

et al. 2024

Agrosystems Geosci & Env

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Cover crops are usually terminated prior to planting the cash crop; however, “planting green” is an alternative approach that allows growers to plant cash crop into an actively growing, green cover crop, which is then terminated after the establishment of the cash crop. The objectives of this study were (1) to determine whether planting soybean (Glycine max L. Merr.) into a standing cereal rye (Secale cereale L.) cover crop provides superior weed suppression compared to terminating cereal rye 2 weeks before soybean planting and (2) to evaluate an integrated effect of herbicide programs and cereal rye termination timing on Palmer amaranth (Amaranthus palmeri S. Watson) control, biomass, seed production, soybean grain yield, and benefit/cost ratio. Field experiments were conducted in southcentral Nebraska from 2020 to 2022. Preemergence (PRE) herbicide with 2 weeks after planting (WAP) termination of cereal rye provided >95% Palmer amaranth control in 2021 and varied from 88% to 98% in 2022 at 28 days after PRE. A PRE herbicide followed by (fb) late‐postemergence (LPOST) herbicide with 2 WAP termination of cereal rye controlled Palmer amaranth 85%–92% in 2021 compared with 97%–99% control 28 days after LPOST herbicide application in 2022. Palmer amaranth density was higher with 2 WBP cereal rye termination compared with 2 WAP termination regardless of the herbicide program. PRE fb LPOST herbicide programs integrated with 2 WAP termination of cereal rye reduced Palmer amaranth seed production to less than 9100 seeds plant−1 in 2021 and no seed production in 2022. In 2021, terminating cereal rye 2 WAP played an integral role in controlling and reducing the density of Palmer amaranth; however, it had noticeable impact on soybean yield compared to terminating 2 WBP. In 2022, hail and windstorm had a confounding effect on soybean stand and yield.

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Influence of soybean row width and velvetleaf emergence time on velvetleaf (Abutilon theophrasti)

Cited by 12 publications

References 27 publications

Study of relationship between soybean (Glycine max (L.) Merr.) planting spatial arrangements and velvetleaf (Abutilon theophrasti L.) population dynamic

Study of relationship between soybean (Glycine max (L.) Merr.) planting spatial arrangements and velvetleaf (Abutilon theophrasti L.) population dynamic

Interactions between reduced rate of imazethapyr and multiple weed species–soyabean interference in a semi‐arid environment

Integrating fall‐planted cereal rye cover crop with herbicides for reducing Palmer amaranth seed production in soybean under planting green conditions

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