Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Residual control (3)
- Weed control (3)
- Cover crops (2)
- Dicamba-tolerant soybean (2)
- Glyphosate (2)
-
- Herbicide resistance (2)
- Palmer amaranth (2)
- Sequential applications (2)
- Weeds (2)
- Windmillgrass (2)
- Biomass production (1)
- Cold-tolerant grain sorghum (1)
- Cover crop (1)
- Crop response (1)
- Dicamba (1)
- Dryland (1)
- Fall-applied herbicide (1)
- Glyphosate-resistant Palmer amaranth (1)
- HPPD inhibitors (1)
- Herbicide combination (1)
- Herbicide efficacy (1)
- Herbicide programs (1)
- Herbicide resistant weeds (1)
- Herbicide timing (1)
- Herbicide-resistant sorghum (1)
- Herbicide-tolerant sorghum (1)
- Multiple herbicide resistance (1)
- Multiple resistant kochia (1)
- Repeat applications (1)
- Residual weed control (1)
Articles 1 - 20 of 20
Full-Text Articles in Plant Sciences
Herbicide Strategies For Managing Glyphosate- And Dicamba-Resistant Kochia In Roundup Ready 2 Xtend Soybean, V. Kumar, R. Liu, T. Lambert, P. W. Stahlman
Herbicide Strategies For Managing Glyphosate- And Dicamba-Resistant Kochia In Roundup Ready 2 Xtend Soybean, V. Kumar, R. Liu, T. Lambert, P. W. Stahlman
Kansas Agricultural Experiment Station Research Reports
Kochia populations with multiple resistance to glyphosate and dicamba are an increasing concern for growers in the High Plains region, including Kansas. A field study was conducted at the Kansas State University Agricultural Research Center near Hays, KS, to evaluate and develop herbicide options for controlling glyphosate- and dicamba-resistant kochia in Roundup Ready 2 Xtend soybean. The study site was uniformly infested with a glyphosate- and dicamba-resistant kochia population prior to soybean planting. Fifteen herbicide treatments (programs), including PRE alone and PRE followed by (fb) POST-applied herbicides, were investigated in a randomized complete block design with four replications. …
Application Timing Efficacy Of Enlist Duo In Irrigated Corn, R. S. Currie, P. W. Geier
Application Timing Efficacy Of Enlist Duo In Irrigated Corn, R. S. Currie, P. W. Geier
Kansas Agricultural Experiment Station Research Reports
In this study, herbicides were tested to compare application timing for weed control in irrigated corn. All herbicides tested provided season-long control (90% or more) of Palmer amaranth, Russian thistle, quinoa, and common sunflower. The inclusion of Enlist Duo to SureStart II as an early postemergence (V2) treatment increased kochia and johnsongrass control compared to a preemergence treatment of SureStart II alone early in the season. However, by later in the year, control of kochia and johnsongrass was best when Enlist Duo application was delayed until the V4 stage. Enlist Duo provided equal control of all weeds when applied at …
Efficacy Of Zest Application Timings In Irrigated Acetolactase Synthase-Resistant Grain Sorghum, R. S. Currie, P. W. Geier
Efficacy Of Zest Application Timings In Irrigated Acetolactase Synthase-Resistant Grain Sorghum, R. S. Currie, P. W. Geier
Kansas Agricultural Experiment Station Research Reports
Acetolactase synthase inhibiting (ALS) herbicides were evaluated for efficacy in ALS-resistant grain sorghum. Kochia and quinoa control were similar among all herbicides tested regardless of evaluation date. Cinch ATZ alone preemergence, and Cinch plus Resolve and Harmony GT PRE followed by Zest POST controlled puncturevine 73-78%. Late-season green foxtail control was best when Zest was included as an early postemergence or postemergence application. Cinch ATZ applied alone preemergence, Cinch ATZ preemergence followed by Zest POST, and Cinch plus Resolve and Harmony GT PRE followed by Zest POST controlled Palmer amaranth 81–84%, and resulted in the highest grain yields.
Efficacy Of Sequential Herbicide Applications In Glufosinate- And Glyphosate-Resistant Corn, R. S. Currie, P. W. Geier
Efficacy Of Sequential Herbicide Applications In Glufosinate- And Glyphosate-Resistant Corn, R. S. Currie, P. W. Geier
Kansas Agricultural Experiment Station Research Reports
To determine their efficacy in corn, this study compared two preemergence programs and sequential glufosinate (Interline) or glyphosate (Roundup PowerMax). Control of common sunflower and Russian thistle was excellent regardless of herbicide treatment. Preemergence herbicides alone provided no more than 78% johnsongrass control early in the season. By late season, only those plots receiving Roundup PowerMax had more than 85% johnsongrass control. However, corn yields did not differ among treatments, and all herbicides increased yield 70–97% relative to nontreated corn.
Herbicide And Application Timing Effects On Windmillgrass (Chloris Verticillata) Control, Nicholas Mitchell, Jared Hoyle
Herbicide And Application Timing Effects On Windmillgrass (Chloris Verticillata) Control, Nicholas Mitchell, Jared Hoyle
Kansas Agricultural Experiment Station Research Reports
Windmillgrass (Chloris verticillataNutt.) populations commonly infest turfgrass systems in the midwest, which result in aesthetically unacceptable turfgrass stands. Research trials were initiated in 2017 and 2018, in Onaga and Junction City, KS, to determine windmillgrass control with various single herbicide applications at different application timings. Pylex (topramezone) resulted in more than 80% windmillgrass control 8 weeks after spring and summer application.
Influence Of Herbicide Combinations And Sequential Applications On Windmillgrass (Chloris Verticillata) Control, Nicholas Mitchell, Jared Hoyle
Influence Of Herbicide Combinations And Sequential Applications On Windmillgrass (Chloris Verticillata) Control, Nicholas Mitchell, Jared Hoyle
Kansas Agricultural Experiment Station Research Reports
Windmillgrass (Chloris verticillataNutt.) populations commonly infest turfgrass systems in the midwest, which result in aesthetically unacceptable turfgrass stands. Pylex (topramezone) and Acclaim Extra (fenoxaprop) have resulted in fair control of windmillgrass with single applications. For adequate control of windmillgrass, a sequential application of Tenacity (mesotrione), three weeks after the initial application, is recommended. Additionally, studies have shown the addition of triclopyr to HPPD inhibitor herbicides increases windmillgrass control in a controlled environment. Field experiments were initiated in 2018, at the Kansas State University Rocky Ford Turfgrass Research Center in Manhattan, KS, to determine the influence of herbicide combinations …
Anthem Maxx Tank Mixture Comparisons In Irrigated Corn, R. S. Currie, P. W. Geier
Anthem Maxx Tank Mixture Comparisons In Irrigated Corn, R. S. Currie, P. W. Geier
Kansas Agricultural Experiment Station Research Reports
The use of multiple herbicide modes of action in single versus sequential applications was examined for efficacy in corn. Common sunflower control was complete with all early postemergence and postemergence herbicides late in the season. Control of Russian thistle, Palmer amaranth, and green foxtail were 95% or more with all early postemergence and postemergence herbicides except Halex GT. All herbicide treatments increased grain yield 15–33% compared to the nontreated controls except Halex GT applied early postemergence.
Zest Efficacy And Crop Response In Two Acetolactase Synthase-Tolerant Grain Sorghum Hybrids, R. S. Currie, P. W. Geier
Zest Efficacy And Crop Response In Two Acetolactase Synthase-Tolerant Grain Sorghum Hybrids, R. S. Currie, P. W. Geier
Kansas Agricultural Experiment Station Research Reports
Two ALS-tolerant grain sorghum hybrids were evaluated for efficacy and crop tolerance to Zest (nicosulfuron). Weed control and crop response in two herbicide-tolerant sorghum hybrids were similar. All herbicides controlled kochia, common sunflower, velvetleaf, and quinoa well. Palmer amaranth control was inadequate when no preemergence (PRE) herbicide was applied. Puncturevine and green foxtail control was 90% or more with all Zest (nicosulfuron) treatments applied early postemergence (EPOST) or postemergence (POST). Sorghum injury from the Zest treatments was minor and transient. Relative to the untreated controls, grain yields were greater when a PRE or PRE followed by POST program was used. …
Using Cover Crops As An Effective Weed Control Method In Southeast Kansas, L. I. Chism, J. A. Dille, G. F. Sassenrath
Using Cover Crops As An Effective Weed Control Method In Southeast Kansas, L. I. Chism, J. A. Dille, G. F. Sassenrath
Kansas Agricultural Experiment Station Research Reports
Weed control is important to optimize crop production. This study was conducted to compare the effectiveness of different methods of fall-implemented weed control strategies. These strategies included different cover crop mixes, chemical control, and mechanical control. The cover crop mixes included four different commonly-planted winter cover crops. The chemical control was a fall-applied burndown, and the mechanical control was vertical tillage. We found cover crop mixes that contained cereal rye provided the most weed control, with the chemical control being a close second. Spring oats die during the winter because of the low temperatures. The three cover crop mixes containing …
Effects Of Spring-Planted Cover Crops On Weed Suppression And Winter Wheat Grain Yield In Western Kansas, A. K. Obour, J. D. Holman, J. A. Dille, V. Kumar
Effects Of Spring-Planted Cover Crops On Weed Suppression And Winter Wheat Grain Yield In Western Kansas, A. K. Obour, J. D. Holman, J. A. Dille, V. Kumar
Kansas Agricultural Experiment Station Research Reports
Herbicide resistant (HR) weeds pose a major challenge to continuous no-tillage (NT) dryland crop management systems. Integrating cover crop (CCs) in dryland crop rotations could suppress weeds and provide a weed management option for HR weeds in NT systems. Field experiments were conducted to investigate weed suppression potential of spring-planted CCs and their impacts on subsequent winter wheat grain yields. The CCs were oat/triticale, oat/triticale/pea, spring pea, and chem-fallow (standard) over 3 years and 2 locations in western Kansas. A weedy-fallow check was added to compare weed suppression of CCs in 2 out of the 3 years. Results showed CC …
Comparisons Of Acuron, Surestart Ii, And Valor For Residual Weed Control In Grain Sorghum, R. S. Currie, P. W. Geier
Comparisons Of Acuron, Surestart Ii, And Valor For Residual Weed Control In Grain Sorghum, R. S. Currie, P. W. Geier
Kansas Agricultural Experiment Station Research Reports
Herbicides were compared to standard treatments for preplant efficacy and crop response in grain sorghum. All herbicides controlled buffalobur and velvetleaf similarly late in the season. SureStart II and Acuron provided the best Palmer amaranth, puncturevine, and green foxtail control. Valor at 1 or 2 oz/a provided less than 70% puncturevine and green foxtail control late in the season. Only minimal visual injury was observed, and all herbicides increased sorghum yield 47–122% relative to the untreated controls.
Comparison Of Preemergence Herbicides For Residual Weed Control In Grain Sorghum, R. S. Currie, P. W. Geier
Comparison Of Preemergence Herbicides For Residual Weed Control In Grain Sorghum, R. S. Currie, P. W. Geier
Kansas Agricultural Experiment Station Research Reports
Herbicides were studied to determine preemergence efficacy in grain sorghum. Velvetleaf and quinoa control did not differ between herbicides late in the season, and no treatment controlled puncturevine more than 81%. The three-way mixture of Callisto, atrazine, and Dual Magnum controlled Palmer amaranth and green foxtail as well as or better than any herbicide tested, whereas most herbicides controlled kochia 88% or more. Compared to the nontreated controls, all herbicides increased sorghum yield 46–146% except Callisto alone at 6 oz/a.
Biomass Production Of Single Species Cover Crop, G. F. Sassenrath, J. K. Farney
Biomass Production Of Single Species Cover Crop, G. F. Sassenrath, J. K. Farney
Kansas Agricultural Experiment Station Research Reports
Cover crops can benefit agricultural production by improving soil health and productivity, reducing weeds, and providing biomass for grazing. In this one-year study, biomass production was measured in 17 different single species summer cover crops and a fallow control. Overall, grass species produced more biomass than brassicas, with legumes, broadleaves, and fallow yielding intermediate amounts of biomass. Within the grass species, pearl millet, brown midrib (BMR) sorghum, and sorghum sudan produced more biomass than proso millet; German millet and browntop millet had intermediate biomass production. Within the brassicas, both brown and yellow mustards produced more biomass than collards. There was …
Effective Herbicide Options For Controlling Glyphosate-Resistant Palmer Amaranth In Roundup Ready 2 Xtend Soybean, V. Kumar, R. Liu, T. Lambert, D. E. Peterson, C. L. Minihan, P. W. Stahlman
Effective Herbicide Options For Controlling Glyphosate-Resistant Palmer Amaranth In Roundup Ready 2 Xtend Soybean, V. Kumar, R. Liu, T. Lambert, D. E. Peterson, C. L. Minihan, P. W. Stahlman
Kansas Agricultural Experiment Station Research Reports
Glyphosate-resistant (GR) Palmer amaranth has become a serious challenge for soybean producers in the mid-south and central United States, including Kansas. Field experiments were conducted at the Kansas State University Agricultural Research Center (KSU-ARC) near Hays, KS, and Kansas State University Ashland Bottoms (KSU-AB) research farm near Manhattan, KS, to determine the effectiveness of preemergence (PRE) and PRE followed by (fb) postemergence (POST) herbicide programs on GR Palmer amaranth control in Roundup Ready 2 Xtend soybean. The study site at Hays was infested with GR Palmer amaranth population prior to soybean planting; whereas, the Manhattan site had natural …
Characterization And Management Of Glyphosate- And Hppd-Inhibitor-Resistant Palmer Amaranth In Kansas Corn Production, V. Kumar, R. Liu, T. Lambert
Characterization And Management Of Glyphosate- And Hppd-Inhibitor-Resistant Palmer Amaranth In Kansas Corn Production, V. Kumar, R. Liu, T. Lambert
Kansas Agricultural Experiment Station Research Reports
Multiple herbicide-resistant (MHR) Palmer amaranth is an increasing management concern for Kansas grain producers. The main purpose of this research was to 1) characterize the resistance levels to glyphosate (Roundup PowerMax) and mesotrione (Callisto) in an MHR Palmer amaranth population collected from Stafford County, KS, compared to a known herbicide-susceptible (SUS) population; and 2) to evaluate the effectiveness of preemergence (PRE), PRE followed by (fb) early post emergence (EPOST), and PREfblate POST (LPOST) herbicide programs for controlling this MHR population in Roundup Ready and LibertyLink corn. To achieve these objectives, a whole plant dose-response study was …
Influence Of Cultural Practices And Herbicide Programs For Managing Glyphosate-Resistant Palmer Amaranth In Cold-Tolerant Sorghum, R. Liu, V. Kumar, R. Perumal, T. Lambert, T. Ostmeyer
Influence Of Cultural Practices And Herbicide Programs For Managing Glyphosate-Resistant Palmer Amaranth In Cold-Tolerant Sorghum, R. Liu, V. Kumar, R. Perumal, T. Lambert, T. Ostmeyer
Kansas Agricultural Experiment Station Research Reports
The widespread evolution of glyphosate-resistant (GR) Palmer amaranth (Amaranthus palmeriS. Wats) has become a serious management concern for grain sorghum producers in western Kansas. To develop an integrated weed management (IWM) system, a field study was conducted at the Kansas State University Agricultural Research Center (KSU-ARC) in Hays, KS, in 2018, to evaluate the effect of sorghum hybrid, row spacing, and herbicide programs on GR Palmer amaranth control, shoot dry weight reduction, and sorghum grain yield. Treatments included two cold-tolerant grain sorghum hybrids: Pioneer 87P06 (commercial check) and ATx645/ ARCH12012R (developed by the KSU-ARC breeding program); row spacing …
Comparisons Of Terbuthylazine And Atrazine Rates And Tank Mixtures In Irrigated Corn, R. S. Currie, P. W. Geier
Comparisons Of Terbuthylazine And Atrazine Rates And Tank Mixtures In Irrigated Corn, R. S. Currie, P. W. Geier
Kansas Agricultural Experiment Station Research Reports
A comparison of terbuthylazine and atrazine rates alone and in combination with other herbicides in corn was conducted. All herbicides controlled Russian thistle and common sunflower by 90% or more. Preemergence control of green foxtail required a tank mixture of mesotrione (Stalwart C, Stalwart 3W, SA-0070128, and SA-0070129) with terbuthylazine or atrazine to be effective. Both terbuthylazine and atrazine alone provided similar kochia control, but control tended to increase with the addition of mesotrione. Palmer amaranth control was similar among terbuthylazine rates early in the season, but increased as atrazine rate increased. Crabgrass control increased as terbuthylazine rate increased early …
Liberty Compared To Glyphosate Products In Irrigated Corn, R. S. Currie, P. W. Geier
Liberty Compared To Glyphosate Products In Irrigated Corn, R. S. Currie, P. W. Geier
Kansas Agricultural Experiment Station Research Reports
Postemergence treatments of Liberty (glufosinate) were compared to Durango DMA and Roundup PowerMax (glyphosate) after various preemergence treatments for efficacy in corn. Control of common sunflower, green foxtail, Russian thistle, and quinoa exceeded 92% regardless of herbicide treatment or evaluation date. Similarly, all preemergence (PRE) treatments controlled Palmer amaranth, kochia, and crabgrass by 93% or more. Later in the season, control of kochia was slightly less when Verdict (saflufenacil/dimethenamid) and atrazine PRE was followed by Roundup PowerMax and atrazine postemergence (POST). Palmer amaranth and crabgrass control was less when Verdict and atrazine PRE was followed by Roundup PowerMax or Liberty …
Vida Alone And In Tank Mixtures For Kochia Control In Fallow, R. S. Currie, P. W. Geier
Vida Alone And In Tank Mixtures For Kochia Control In Fallow, R. S. Currie, P. W. Geier
Kansas Agricultural Experiment Station Research Reports
To learn more about kochia control in fallow, a comparison of Vida alone and in tank mixtures was conducted. Glyphosate alone provided no more than 40% kochia control, and was similar to Vida or 2,4-D alone late in the season. The tank mixture of Vida plus Gramoxone and Spartan controlled kochia the best regardless of rating date, and was the only treatment to provide more than 95% control at 28 days.
Split Applications Of Coyote And Lumax For Efficacy In Grain Sorghum, R. S. Currie, P. W. Geier
Split Applications Of Coyote And Lumax For Efficacy In Grain Sorghum, R. S. Currie, P. W. Geier
Kansas Agricultural Experiment Station Research Reports
In an effort to determine the efficacy of herbicide application timing in sorghum, full herbicide rates were applied 14 days preplant, and compared with split applications of half rates applied at two timings. Generally, weed control was best when half of the labeled rates were applied 14 days preplant followed by the other half preemergence, compared to full rates applied 14 days preplant. However, control of velvetleaf and common sunflower was excellent (95% or more) regardless of when the treatments were applied. Grain sorghum yields were similar among all herbicide treatments, and each treatment increased yield from 2 to 2.5-fold …