Herbicide Programs for Controlling Glyphosate-Resistant Johnsongrass (<i>Sorghum halepense</i>) in Glufosinate-Resistant Soybean

Johnson, D. B.; Norsworthy, Jason K.; Scott, Robert C.

doi:10.1614/wt-d-13-00099.1

Cited by 18 publications

(21 citation statements)

References 30 publications

(37 reference statements)

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“…Use of commercially available PRE herbicides, particularly for soybean and maize, with different modes of actions (e.g., s-metolachlor, pendimethalin, flufenacet, and clomazone) were reported to be effective in controlling S. halepense seedlings, not regrowth from rhizomes (Scarabel et al 2014). Since their introduction in the 1980s, POST herbicides, mainly acetyl-coenzyme-A carboxylase (ACCase) and acetolactate synthase (ALS)-inhibitors, have showed a high efficacy against both the seedlings and rhizomes of S. halepense (Johnson et al 2014b;Johnson and Norsworthy 2014;Scarabel et al 2014). Among these herbicide groups, sulfonylureas, aryloxyphenoxypropionates (FOPs), and cyclohexanediones (DIMs) are widely applied for control of S. halepense in maize, soybean, cotton, and other dicotyledonous crops (Bridges and Chandler 1987b;Corkern et al 1998;Sarpe et al 2000;Smeda et al 2000;Kaloumenos and Eleftherohorinos 2009).…”

Section: Herbicide-susceptible Biotypesmentioning

confidence: 99%

“…The introduction of glufosinate-tolerant crops has provided farmers with alternatives for the control of this weed without any crop injury e.g. glufosinate, s-metolachlor, pendimethalin, flufenacet, and clomazone (Johnson and Norsworthy 2014;Scarabel et al 2014;Johnson et al 2014b;Landry et al 2016). Sarpe et al (2000) Failures in weed control are usually associated with a mismatch between the weed population, herbicide application time, and herbicide sub-doses (Uremis et al 2009).…”

Section: Herbicide-resistant Biotypesmentioning

confidence: 99%

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Eco-biology, impact, and management of Sorghum halepense (L.) Pers.

et al. 2017

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Sorghum halepense (L.) Pers. is ranked among the worst and extensively disseminated weed species. It is emerging as a potential menace for agroecosystems in 53 different countries across the world. This weed is adapted to warmer regions and is native to Mediterranean areas of Africa, Asia, and Europe. In the mid-1900s, cultivation of this weed species as a potential forage crop resulted in its escape from crop fields and invasion of agricultural and natural areas, but in some European countries, it has been introduced deliberately (e.g., as contamination of seeds and soil). S. halepense interferes with economically important agronomic and horticultural crops and cause 57-88% yield losses. Herbicide tolerance, diverse propagation mechanisms, rapid development, and strong competitiveness are key attributes in its invasion. Conventional management approaches are limited in their scope to control this weed due to its rapid vegetative growth and increasing herbicidal tolerance. Integration of chemical methods with cultural or mechanical approaches is important for restricting its future spread to non-infested areas. This review provides insights into the invasion mechanisms of S. halepense, which will help in its

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Section: Herbicide-susceptible Biotypesmentioning

confidence: 99%

Section: Herbicide-resistant Biotypesmentioning

confidence: 99%

Eco-biology, impact, and management of Sorghum halepense (L.) Pers.

et al. 2017

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“…Conversely, Johnson et al [41] observed no differences in glufosinate-resistant soybean yield following herbicide programs for johnsongrass control (2,690 to 3,160 kg ha −1 ); however, differences might have been observed if their studies had not been sprayed with clethodim 10 WAE.…”

Section: Soybean Yieldmentioning

confidence: 88%

“…This observation may be due to increased johnsongrass leaf number (5 leaves versus 7 leaves) providing greater interception of glufosinate when applied POST3. Johnson et al [41], Wiesbrook et al [50], and Prostko et al [51] suggested that sequential applications of herbicides are more effective at controlling weeds.…”

Section: Glyphosate-resistant Rhizomatous Johnsongrass Controlmentioning

confidence: 99%

“…At 14 DAT, Johnson and Norsworthy [40] observed an inverse relationship between johnsongrass height at glufosinate (0.7 kg ha −1 ) application and control with 96, 91, and 78% control of 15, 30, and 45 cm johnsongrass, respectively. However, effective johnsongrass control has been reported with sequential applications of glufosinate or herbicide combinations with glufosinate (80% or greater 10 WAE), but sequential applications were made at the same rate (e.g., 590 g ai ha −1 followed by (fb) 590 g ai ha −1 ) and timing (3 and 6 wk after emergence) [41].…”

Section: Introductionmentioning

confidence: 99%

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Glufosinate Rate and Timing for Control of Glyphosate-Resistant Rhizomatous Johnsongrass (Sorghum halepense) in Glufosinate-Resistant Soybean

Landry

Stephenson

Woolam

2016

International Journal of Agronomy

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Field studies were conducted over a three-year period (2011, 2012, and 2013) in Louisiana to evaluate the effect of glufosinate rate and timing on glyphosate-resistant (GR) rhizomatous johnsongrass control in glufosinate-resistant soybean. Treatments included glufosinate (0.5, 0.6, or 0.7 kg ai ha−1) applied alone POST1 (46 cm tall johnsongrass) and sequentially 3 (POST2) or 4 (POST3) wk after POST1 at 0.5 or 0.6 kg ha−1. Glufosinate (0.7 kg ha−1) applied POST1 controlled johnsongrass 77% at soybean harvest. Averaged across sequential application rate, delaying the sequential application from POST2 to POST3 increased control from 65 to 78% at harvest. Increasing sequential application rate from 0.5 to 0.6 kg ha−1reduced johnsongrass heights 15% at harvest. Furthermore, delaying the sequential application from POST2 to POST3 reduced GR rhizomatous johnsongrass heights to 63% of the nontreated at harvest. Soybean yields were maximized following the POST1 application of glufosinate at 0.7 kg ha−1(2670 kg ha−1) and by applying 0.6 kg ha−1of glufosinate sequentially (2620 kg ha−1), regardless of sequential application timing. Maximum control and soybean yield were observed following glufosinate POST1 at 0.7 kg ha−1followed by 0.6 kg ha−1at POST3. This data indicates that glufosinate is an option for management of GR rhizomatous johnsongrass.

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Perspectives on transgenic, herbicide‐resistant crops in the United States almost 20 years after introduction

Duke¹

2015

Pest Management Science

124

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Herbicide-resistant crops have had a profound impact on weed management. Most of the impact has been by glyphosate-resistant maize, cotton, soybean and canola. Significant economic savings, yield increases and more efficacious and simplified weed management have resulted in widespread adoption of the technology. Initially, glyphosate-resistant crops enabled significantly reduced tillage and reduced the environmental impact of weed management. Continuous use of glyphosate with glyphosate-resistant crops over broad areas facilitated the evolution of glyphosate-resistant weeds, which have resulted in increases in the use of tillage and other herbicides with glyphosate, reducing some of the initial environmental benefits of glyphosate-resistant crops. Transgenic crops with resistance to auxinic herbicides, as well as to herbicides that inhibit acetolactate synthase, acetyl-CoA carboxylase and hydroxyphenylpyruvate dioxygenase, stacked with glyphosate and/or glufosinate resistance, will become available in the next few years. These technologies will provide additional weed management options for farmers, but will not have all of the positive effects (reduced cost, simplified weed management, lowered environmental impact and reduced tillage) that glyphosate-resistant crops had initially. In the more distant future, other herbicide-resistant crops (including non-transgenic ones), herbicides with new modes of action and technologies that are currently in their infancy (e.g. bioherbicides, sprayable herbicidal RNAi and/or robotic weeding) may affect the role of transgenic, herbicide-resistant crops in weed management. Published 2014. This article is a U.S. Government work and is in the public domain in the USA.

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Herbicide Programs for Controlling Glyphosate-Resistant Johnsongrass (Sorghum halepense) in Glufosinate-Resistant Soybean

Cited by 18 publications

References 30 publications

Eco-biology, impact, and management of Sorghum halepense (L.) Pers.

Eco-biology, impact, and management of Sorghum halepense (L.) Pers.

Glufosinate Rate and Timing for Control of Glyphosate-Resistant Rhizomatous Johnsongrass (Sorghum halepense) in Glufosinate-Resistant Soybean

Perspectives on transgenic, herbicide‐resistant crops in the United States almost 20 years after introduction

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