Halosulfuron Reduced Purple Nutsedge (<i>Cyperus rotundus</i>) Tuber Production and Viability

Webster, Theodore M.; Grey, Timothy L.

doi:10.1614/ws-d-14-00032.1

Cited by 24 publications

(34 citation statements)

References 38 publications

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“…Differences in tuber population density response to imazapic between late-emerging and shootless tubers were consistent with previous findings with halosulfuron (Webster and Grey 2014).…”

Section: −1supporting

confidence: 91%

“…nutsedge response to halosulfuron determined that the 1 × :I 50 was 6.5, suggesting a greater foliar response from purple nutsedge to halosulfuron than observed with imazapic at the registered rates (Webster and Grey 2014 (Das et al 2014). For that study, the authors determined that the economic threshold for herbicide application for purple nutsedge control was 19 to 22 purple nutsedge plants m −2 .…”

Section: Methodsmentioning

confidence: 98%

“…In the nontreated control, greater tuber biomass occurred in the shootless tuber class (420 g plant −1 or 69%), with late-emerging tubers representing 24% (145 g plant Table 2. effect of imazapic on the number of viable tubers (Webster and Grey 2014). Assessment of the maximum total tuber sprouting (parameter d) ranged from 85 to 92% across the tuber classes (Table 2).…”

Section: −1mentioning

confidence: 99%

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Purple Nutsedge (Cyperus rotundus) Tuber Production and Viability Are Reduced by Imazapic

2016

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Weeds exploit underutilized space, causing economic losses in cropping systems. Weed management tactics alter that underutilized space until the crop can mature and efficiently use that space. One tactic is to reduce the weed propagules (e.g., seeds and tubers) that persist quiescently in the soil, which includes minimizing production and addition of new propagules to the soil. Purple nutsedge is a problematic weed around the globe, persisting between growing seasons as tubers in the soil. Imazapic is a peanut herbicide often used in Georgia for control of purple nutsedge. The objective of the experiment was to evaluate the effect of various rates of imazapic on purple nutsedge tuber production. Single presprouted purple nutsedge tubers were transplanted into outdoor microplots and treated after 6 wk of growth with six rates of imazapic (5 to 140 g ai ha −1 ) POST. A nontreated control was included. All emerged shoots at the time of application were marked with plastic rings; this allowed for classification of tubers at exhumation as (1) tubers attached to shoots that were emerged at time of application, (2) tubers attached to shoots that emerged after application, and (3) tubers without an aerial shoot during the study. At 7 wk after application, the tubers in the microplots were exhumed, classified, and quantified, and their ability to sprout was evaluated. In the nontreated control, there were 544 total tubers, with a log-logistic regression model describing the declining tuber population with increasing imazapic rate. The rate of imazapic that reduced total tuber population 50% (I 50 ) was 36 g ha −1. In the nontreated control, there were 161 tubers attached to shoots that emerged, as when compared with plots that received an imazapic application that had an I 50 = 60 g ha −1. Viability of purple nutsedge tubers was 44% at 70 g ha −1 imazapic, suggesting the action of the herbicide may have rendered the tubers nonviable after new shoots were produced. The final classification of tubers included those that did not have an aerial shoot during the study. These were tubers in which apical dominance suppressed shoot development or were likely the most recent tubers to develop. Of the three classes, the tubers without shoots were the most prevalent in the nontreated control, with 358 tubers and an I 50 = 18 g ha −1. Imazapic controls purple nutsedge foliage but also reduces the number of new tubers produced, and overall tuber viability and is a valuable tool in management of the long-term population density of this weed. Nomenclature: Imazapic, purple nutsedge, Cyperus rotundus L., CYPRO.

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“…Differences in tuber population density response to imazapic between late-emerging and shootless tubers were consistent with previous findings with halosulfuron (Webster and Grey 2014).…”

Section: −1supporting

confidence: 91%

Section: Methodsmentioning

confidence: 98%

Section: −1mentioning

confidence: 99%

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Purple Nutsedge (Cyperus rotundus) Tuber Production and Viability Are Reduced by Imazapic

2016

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“…No herbicide treatment controlled purple nutsedge at 60 DAT (data not shown). Purple nutsedge is a troublesome weed worldwide (Webster and Grey 2014) and it is difficult to control because its reproduction is mainly by rhizomes and tubers, persisting for 3-5 yr (DeFelice 2002).…”

Section: Weed Control and Weed Densitymentioning

confidence: 99%

Weed control in conventional soybean with pendimethalin followed by imazethapyr plus imazamox/quizalofop

Yadav¹,

Bhullar²,

Kaur³

et al. 2017

Can. J. Plant Sci.

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The objectives of this study were to evaluate the efficacy of pendimethalin applied pre-emergence (PRE) followed by post-emergence (POST) application of imazethapyr + imazamox/quizalofop-p-ethyl for weed control and their effect on conventional soybean injury, yield attributes, and yield. Field experiments were conducted in 2013 and 2014 in conventional soybean. Herbicide treatments provided ≥90%, 70%, and 85% control of crowfoot grass, large crabgrass, and goosegrass, respectively, and ≤80% control of false amaranth and horse purslane at 30 d after sowing (DAS). At 60 DAS, pendimethalin applied alone or followed by hand-hoeing/quizalofop-p-ethyl/ imazethapyr +imazamox provided 100% control of goosegrass and 65%-100% control of crowfoot grass/large crabgrass. Pendimethalin followed by imazethapyr + imazamox/quizalofop-p-ethyl as well as quizalofop-p-ethyl applied alone resulted in complete control of crowfoot grass, large crabgrass, and goosegrass, but control of broadleaf weeds was variable. Pendimethalin followed by imazethapyr + imazamox at 70 g ha −1 at 28 DAS, imazethapyr + imazamox at 60 or 70 g ha −1 at 21 DAS followed by quizalofop-p-ethyl at 37.5 g ha −1 at 42 DAS resulted in soybean branch numbers per plant, number of pods per plant, and soybean seed yield comparable to weed-free control. Control of Benghal dayflower and purple nutsedge was not acceptable.Résumé : Cette étude devait évaluer l'efficacité de l'application de pendiméthaline avant la levée (PRE) puis celle d'imazetapyr et du mélange imazamox/quizalofop-p-ethyl après la levée (POST) dans la lutte contre les mauvaises herbes. Les auteurs ont aussi examiné les effets du traitement sur les dommages subis par le soja ordinaire, sur les paramètres du rendement et sur le rendement proprement dit. Dans cette optique, ils ont effectué des expériences sur des parcelles de soja ordinaire, sur le terrain, en 2013 et 2014. Le traitement détruit respectivement ≥90, 70 et 85 % du dactyloténion d'Égypte, de la digitaire sanguine et de l'éleusine de l'Inde, ainsi que ≤ 80 % de Digera muricata et du pourpier courant, trente jours après les semis (JAS). Soixante jours après les semis, l'application de pendiméthaline seule ou suivie d'un sarclage et de l'application de quizalofop-p-ethyl ainsi que du mélange imazethapyr-imazamox entraîne la destruction complète de l'éleusine de l'Inde, de même que la destruction de 65 % à 100 % du dactyloténion d'Égypte et de la digitaire sanguine. L'application de pendiméthaline suivie par celle d'imazethapyr et du mélange imazamox/quizalofop-p-ethyl ainsi que l'application de quizalofopp-ethyl seul assure une destruction totale du dactyloténion d'Égypte, de la digitaire sanguine et de l'éleusine d'Égypte, mais l'efficacité de ce traitement contre les dicotylédones varie. L'application de pendiméthaline puis d'imazethapyr et d'imazamox à raison de 70 g par hectare 28 JAS, d'imazethapyr et d'imazamox à raison de 60 ou de 70 g par hectare 21 JAS puis de quizalofop-p-ethyl à raison de 37,5 g par hectare 42 JAS entraîne un nombre...

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“…Purple nutsedge (Cyperus rotundus L.) is a perennial weed with detrimental impact on agriculture and is widely spread throughout the world (Holm et al 1991;Horowitz 1992;Webster and Grey, 2014). Purple nutsedge reproduces by vegetative propagation using basal bulbs and tubers to proliferate into many rhizomes, resulting in populations to grow rapidly and causing great loss in agricultural yields (Nishimoto 2001;Hussain et al 2017).…”

Section: Introductionmentioning

confidence: 99%

The potential of Cosmos sulphureus flower extract as a bioherbicide for Cyperus rotundus

et al. 2019

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Abstract. Respatie. D. W, Yudono P, Purwantoro A, Trisyono Y.A. 2019. The potential of Cosmos sulphureus flower extract as a bioherbicide for Cyperus rotundus. Biodiversitas 20: 3568-3574. Cosmos (Cosmos sulphureus Cav.) flower is recognized as natural source of bioherbicide compounds for several weeds. The purple nutsedge (Cyperus rotundus L.) is an important weed, and this research was aimed to determine the effects of cosmos flower extract on this weed. Dried cosmos flowers were threshed and extracted using maceration method with 70% alcohol. The experiment was conducted in the greenhouse using a completely randomized design (CRD) with three replications. Purple nutsedge tubers were planted in polybags and treated with cosmos flower extract applicated once to three times with 300 mL polybag-1 at the concentration of 40%. Different levels of inhibitions on purple nutsedge growth were observed at 30 and 60 days after sowing (DAS) due to the presence of gallic acid in the extract. Growth parameters for purple nutsedge were analyzed using Analysis of Variance (ANOVA) and followed by Least Significant Differences (LSD) at α=0.05. Significant reductions in the number of mother shoots, daughter shoots, and roots, length of mother leaves, length of rhizomes, root, and total leaf area of the purple nutsedge treated with the cosmos flower extract at 30 DAS compared to those in the control. A significant reduction was also observed in foliage dry weight, underground organs dry weight, and total dry weight of purple nutsedge. The three application times yielded maximum inhibition. In addition, these treatments reduced N, P, and K content, chlorophyll content, and photosynthesis rates at 30 DAS. These results suggest that cosmos flower extract has the potential for controlling purple nutsedge.

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Halosulfuron Reduced Purple Nutsedge (Cyperus rotundus) Tuber Production and Viability

Cited by 24 publications

References 38 publications

Purple Nutsedge (Cyperus rotundus) Tuber Production and Viability Are Reduced by Imazapic

Purple Nutsedge (Cyperus rotundus) Tuber Production and Viability Are Reduced by Imazapic

Weed control in conventional soybean with pendimethalin followed by imazethapyr plus imazamox/quizalofop

The potential of Cosmos sulphureus flower extract as a bioherbicide for Cyperus rotundus

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