Recovery of<i>Cynodon nlemfuensis</i>pasture after desiccation with glyphosate in pre-sowing of maize

Brighenti, A. M.; Vieira, Pedro Henrique Silva

doi:10.5935/paet.v6.n2.06

Cited by 2 publications

(2 citation statements)

References 7 publications

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“…This observation was also verified in Tifton 85 which showed tolerance to glyphosate at 720 g ha -1 (Santos et al, 2007(Santos et al, , 2008. This same behavior was also previously observed in African star grass pasture (Brighenti et al, 2012(Brighenti et al, , 2013. Lower doses of glyphosate were tolerated by African star grass that had been established over 8 years; thus, such application is a viable tool for chemical weed control in African star grass pastures.…”

Section: Resultssupporting

confidence: 78%

Behavior of Five Sulfonylurea Herbicides and a Low-Dose Glyphosate on Cynodon nlemfuensis Pasture

Brighenti¹,

Benites²,

Sobrinho³

et al. 2020

JAS

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African star grass (Cynodon nlemfuensis Vanderyst) is an excellent forage for animal feed, especially in tropical and subtropical climates. However, there is little information on weed management in African star grass pastures. Two experiments were carried out in 2017 and 2018 to evaluate the response of African star grass to five herbicides of the sulfonylureas chemical group and glyphosate at a low dose. The treatments were as follows: metsulfuron-methyl (Ally®) (7.8 and 15.6 g ai ha-1 plus 0.1% v/v mineral oil); chlorimuron-ethyl (Staron®) (15.0 and 30.0 g ai ha-1 plus 0.05% v/v mineral oil); halosulfuron (Sempra ®) (112.5 and 225.0 g ai ha-1 plus 0.1% v/v surfactant); ethoxysulfuron (Gladium®) (150.0 and 300.0 g ai ha-1); nicosulfuron (Sanson®) (60.0 and 120.0 g ai ha-1); glyphosate (Roundup Original®) (360 g ae ha-1); and a control without herbicide application. The herbicides nicosulfuron (60.0 and 120.0 g ai ha-1) and glyphosate were the most phytotoxic treatments; however, none of the treatments caused the total death of African star grass plants. The herbicides metsulfuron-methyl, chlorimuron-ethyl, halosulfuron and ethoxysulfuron were selective and are potential products for use in African star grass pastures.

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Section: Resultssupporting

confidence: 78%

Behavior of Five Sulfonylurea Herbicides and a Low-Dose Glyphosate on Cynodon nlemfuensis Pasture

Brighenti¹,

Benites²,

Sobrinho³

et al. 2020

JAS

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“…Brighenti et al (2012) observed that African star grass pastures tolerate lower doses of glyphosate. Doses ranging from 720 to 1,080 g ae/ha provided suppressed-African star grass plants, avoiding weed competition and resulting in pasture recovery later (Brighenti et al, 2012;Brighenti & Vieira, 2013). Younger plants of sour grass (D. insularis), originating from seeds, were efficiently controlled by glyphosate (Gazola, Belapart, Castro, Cipola Filho, & Dias, 2016).…”

Section: Re Sults and Discussionmentioning

confidence: 99%

Differential tolerance and selectivity of herbicides in forages of the genus Cynodon

2019

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Plant recovery due to herbicide symptoms of phytotoxicity characterizes an additional waste of energy that should not be accepted as a natural physiologic response; therefore, it might result in yield losses. Herbicide‐tolerant forages and the use of less phytotoxic products on pastures provide improvements in chemical weed control and increases in forage yield. The objectives of this study were to test differences between Tifton 85 (Cynodon spp.) and African star grass (Cynodon nlemfuensis) in relation to their degree of tolerance to herbicides, as well as the selectivity of herbicides for both species. The experimental design was completely randomized, in a 2 × 8 factorial, with four replicates. Two species of Cynodon and eight herbicide treatments were evaluated. The tolerance and selectivity of herbicides for Tifton 85 and African star grass are a function of each species and the type and dose of herbicide applied. Among the two species of Cynodon, Tifton 85, in general, was more tolerant to the applied herbicides than was the African star grass and consequently with less probability to occur forage yield losses. The most phytotoxic herbicides for both forages were fluroxypyr + aminopyralid (160.0 + 80.0 g ae/ha [grams of acid equivalent per hectare]), fluroxypyr + triclopyr (320.0 + 960.0 g ae/ha) and glyphosate (180 g ae/ha). The most selective herbicides were bentazon (720.0 g ai/ha [grams of active ingredient per hectare]), imazapyr (25.0 g ai/ha) and MSMA (1,440.0 g ai/ha), which have potential for use in fields of Tifton 85 and African star grass.

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Recovery ofCynodon nlemfuensispasture after desiccation with glyphosate in pre-sowing of maize

Cited by 2 publications

References 7 publications

Behavior of Five Sulfonylurea Herbicides and a Low-Dose Glyphosate on Cynodon nlemfuensis Pasture

Behavior of Five Sulfonylurea Herbicides and a Low-Dose Glyphosate on Cynodon nlemfuensis Pasture

Differential tolerance and selectivity of herbicides in forages of the genus Cynodon

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