Control of Yellow Nutsedge (<i>Cyperus esculentus</i>) and Smooth Pigweed (<i>Amaranthus hybridus</i>) in Summer Squash with Halosulfuron

Trader, Brian W.; Wilson, H. R.; Hines, Thomas E.

doi:10.1614/wt-08-016.1

Cited by 8 publications

(12 citation statements)

References 12 publications

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“…Similarly to what happened to control R. scabra, clomazone association to S-metolachlor and the sequence application of halosulfuron-methyl or ethoxysulfuron after chlorimuron-ethyl have increased the control of C. ferax. The greater control of this species due to the application of halosulfuron-methyl and ethoxysulfuron confirms the high efficacy of these herbicides on Cyperaceae (known as sedges) (Trader et al, 2008;Agostinetto et al, 2011;Khalik & Matloob, 2012), plus ethoxysulfuron is also registered for control of C. ferax (Brasil, 2015). Considering the increasing control efficiency due to herbicides applied in PRE and POS used in this study, in a work on rice cultivation, the application of clomazone in PRE followed by clomazone + halosulfuron in initial POS has increased the control of Cyperus compressus and Sesbania exaltata when compared to the application of clomazone only, under the same application methods (Willingham et al, 2008).…”

Section: Resultsmentioning

confidence: 75%

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Weed Management With Herbicides Applied in Pre and Postemergence on Castor Crop

et al. 2015

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-The aim of this work was to evaluate the weed management with herbicides applied in pre and postemergence on castor crop. The treatments were constituted by management systems using herbicides in pre (PRE) and postemergence (POS): 1) S-metolachlor at 576 g ha -1 (PRE 1) and chlorimuron-methyl at 15 g ha -1 (POS 1); 2) PRE 1 + clomazone at 650 g ha -1 (PRE 2) and POS 1; 3) PRE 1, POS 1 and halosulfuron-methyl at 112.5 g ha -1 (POS 2); 4) PRE 1, POS 1 and ethoxysulfuron at 60 g ha -1 (POS 3); 5) PRE 1, POS 1 and ethoxysulfuron at 120 g ha -1 (POS 4); 6) PRE 1 + PRE 2, POS 1 and POS 2; 7) PRE 1 + PRE 2, POS 1 and POS 3; 8) PRE 1 + PRE 2, POS 1 and POS 4; 9) hand-hoeing control and 10) non-weeded control. The experimental design was randomized blocks with four replications. The association of the herbicides in PRE combined to sequence applications of chlorimuron-ethyl and halosulfuron-methyl or ethoxysulfuron in POS resulted in the highest control levels of Richardia scabra and Cyperus ferax. Mild phytointoxication symptoms to the crop were more persistent with ethoxysulfuron at 120 g ha -1 . The acceptable control of the weed species and similar yield to the hand-hoeing control permitted to conclude that S-metolachlor + clomazone PRE, followed by chlorimuron-ethyl and halosulfuron-methyl POS proved to be more adequate as a weed management strategy on castor crop. Keywords:Ricinus communis, Cyperus ferax, Richardia scabra, efficiency. RESUMO -Objetivou-se com este trabalho avaliar o manejo de plantas daninhas com herbicidas aplicados em pré e pós-emergência na cultura da mamoneira. Os tratamentos foram constituídos por sistemas de manejo utilizando-se herbicidas em pré (PRE) e pós-emergência (POS): 1) S-metolachlor a 576 g ha -1 (PRE 1) e chlorimuron-methyl a 15 g ha -1 (POS 1); 2) PRE 1 + clomazone a 650 g ha -1 (PRE 2) e POS 1; 3) PRE 1, POS 1 e halosulfuron-methyl a 112,5 g ha -1 (POS 2); 4) PRE 1, POS 1 e ethoxysulfuron a 60 g ha -1 (POS 3); 5) PRE 1, POS 1 e ethoxysulfuron a 120 g ha -1 (POS 4); 6) PRE 1 + PRE 2, POS 1 e POS 2; 7) PRE 1 + PRE 2, POS 1 e POS

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Section: Resultsmentioning

confidence: 75%

“…The latter has an effect on monocotyledons and some eudicotyledon weeds. Halosulfuron-methyl can be used for controlling sedges, especially purple nutsedge (Cyperus rotundus), and contribute to the control of some eudicotyledon species (Trader et al, 2008;Walters & Young, 2010;Brasil, 2015).…”

Section: Introductionmentioning

confidence: 99%

Weed Management With Herbicides Applied in Pre and Postemergence on Castor Crop

et al. 2015

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“…, 2007). Similarly, C. esculentus is known to be somewhat tolerant of pre‐emergence herbicides (Trader et al. , 2008).…”

Section: Discussionmentioning

confidence: 99%

“…A high relative abundance of C. canadensis in the post-emergence treatment is consistent with reports of infestations of this species in vineyards under glyphosate treatment (Shrestha et al, 2007). Similarly, C. esculentus is known to be somewhat tolerant of preemergence herbicides (Trader et al, 2008). As C. esculentus is propagated by tubers (Stoller & Sweet, 1987), we might expect to see the most severe infestations of this species in cultivated intra-rows, based on a high potential for propagule dispersal by the cultivator, but this was not the case.…”

Section: Discussionmentioning

confidence: 99%

Weed flora and dormant‐season cover crops have no effects on arbuscular mycorrhizae of grapevine

Baumgartner

Fujiyoshi

Smith³

et al. 2010

Weed Research

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Baumgartner K, Fujiyoshi P, Smith R & Bettiga L (2010). Weed flora and dormant‐season cover crops have no effects on arbuscular mycorrhizae of grapevine. Weed Research50, 456–466. Summary We tested the hypothesis that arbuscular mycorrhizal fungal (AMF) diversity and colonisation of grapevine increase with increasing frequency and diversity of mycorrhizal hosts on the vineyard floor. The vineyard floor cover was manipulated by cover cropping (rye, triticale) inter‐rows, and implementing weed control treatments in intra‐row areas. Weed control treatments were the standard practice of pre‐emergence applications of oxyfluorfen or simazine, and alternatives of post‐emergence applications of glyphosate or oxyfluorfen, and cultivation. Grapevine mycorrhizal colonisation and frequency, diversity and richness of mycorrhizal weeds were examined for 3 years, after which AMF diversity was evaluated using PCR. Canonical correspondence analyses showed that weed control, but not cover crops, affected weed composition; cultivation and post‐emergence treatments were dominated by mycorrhizal weeds (Sonchus oleraceus and Conyza canadensis respectively), pre‐emergence treatments were dominated by non‐mycorrhizal Cyperus esculentus. Weed frequency varied among treatments; cultivation was less effective than both herbicide treatments in the first year, and both cultivation and post‐emergence herbicide were least effective in the last year. Therefore, the alternative weed control methods may not be as effective as the pre‐emergence herbicide. Weed control had a significant interaction with year on frequency, diversity and richness of mycorrhizal weeds, none of which correlated with grapevine mycorrhizal colonisation. Our finding of no effect of weed control on grapevine mycorrhizae, despite significant effects on weeds, provide no support our hypothesis, but rather suggest that mycorrhizal hosts on the vineyard floor have no influence on grapevine mycorrhizae.

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“…However, in the absence of weed control evaluation 6 WAP for bensulide alone, it is not possible to determine if excellent smooth pigweed control was the result of S-metolachlor applied EPOST or if bensulide PRE was still providing residual control. Other researchers had also reported a lack of smooth pigweed control with clomazone compared with other PRE herbicides (Liebl and Norman 1991;Trader et al 2008). Efficacy of S-metolachlor on various pigweed species has been reported in previous studies.…”

Section: Weed Controlmentioning

confidence: 76%

Weed control and crop tolerance with S-metolachlor in seeded summer squash and cucumber

2020

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Abstract Residual herbicides remain the primary tool for efficient weed control in cucurbit crops because of the lack of crop tolerance to many POST herbicide options. Field experiments were conducted in New Jersey in 2018 and 2019 to determine weed control efficacy and tolerance of direct-seeded cucumber ‘Python‘ and summer squash ’Gold Prize‘ to S-metolachlor applied at 0.7 or 1.4 kg ai ha-1 at planting (PRE) or when crops reached the 2nd to 3rd leaf stage (EPOST). Regardless of applied rate, S-metolachlor PRE or EPOST provided 96 to 100% control 3 wk after planting (WAP) of smooth pigweed, large crabgrass, and giant foxtail. S-metolachlor PRE significantly improved American black nightshade and carpetweed control 3 WAP with respect to bensulide, and smooth pigweed with respect to clomazone + ethalfluralin. Summer squash showed excellent tolerance, regardless of S-metolachlor rate or timing of application, with stunting not exceeding 17% 4 WAP and 3% 7 WAP at the 1.4 kg ha-1 rate. Marketable yield decreased by 15% with S-metolachlor PRE or POST at 1.4 kg ha-1 with respect to clomazone + ethalfluralin, a reduction not noted when comparing to bensulide or the handweeded control. Marketable fruit number per plant and individual fruit weight were not affected by Smetolachlor applications. Conversely, cucumber was more sensitive to S-metolachlor than summer squash with 30% seedling emergence reduction and 36 to 43% stunting 4 WAP when S-metolachlor was applied PRE at 1.4 kg ha-1. EPOST application resulted in 15 to 26% cucumber injury 1 wk after treatment (WAT). Marketable yield declined by 21 and 39% with the 0.7 and 1.4 kg ha-1 rates of S-metolachlor, respectively, compared to clomazone + ethalfluralin. Therefore, S-metolachlor may be a novel alternative to already labeled residual herbicides for summer squash but would cause unacceptable injury and yield reduction for supporting its registration on cucumber.

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Control of Yellow Nutsedge (Cyperus esculentus) and Smooth Pigweed (Amaranthus hybridus) in Summer Squash with Halosulfuron

Cited by 8 publications

References 12 publications

Weed Management With Herbicides Applied in Pre and Postemergence on Castor Crop

Weed Management With Herbicides Applied in Pre and Postemergence on Castor Crop

Weed flora and dormant‐season cover crops have no effects on arbuscular mycorrhizae of grapevine

Weed control and crop tolerance with S-metolachlor in seeded summer squash and cucumber

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