Herbicide Selectivity to Signal Grass and Congo Grass

Anésio, Arnon Henrique Campos; Santos, Maurinho Luiz dos; Silveira, Rodrigo Richard da; Ferreira, E.A.; Braz, T.G.S.; Santos, L.D. Tuffi; Santos, José Barbosa dos

doi:10.1590/s0100-83582017350100062

Cited by 5 publications

(5 citation statements)

References 12 publications

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“…Therefore, it is not recommended to use high doses of this herbicide in areas where the grass of interest is Tanzania guinea grass For signalgrass, the use of high doses of glyphosate resulted in approximately 82% and 90% intoxication at 15 DAA, and total control of the plants at 45 DAA, with 98% and 100% intoxication for the doses 1.5 and 2.0, respectively. This evidences that glyphosate is efficient in the control of signalgrass, similar to that found by Anésio et al (2017), who reported that signalgrass is more susceptible to glyphosate than fluazifop-p-butyl.…”

Section: Glyphosatesupporting

confidence: 88%

Chemical control of signalgrass for establishing Tanzania-grass

Rodrigues

Santos

Paschoaloto

et al. 2020

Acta Sci. Anim. Sci.

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Herbicides have been used to control Brachiaria grass in pastures established or in formation given their practicality, however their efficiency is questionable due to the lack of specific graminicides for different forage species. Therefore, the goal of this study was to evaluate the efficiency of glyphosate and fluazifop-p-butyl in the control of Brachiaria decumbens (signalgrass) and the intoxication levels of Panicum maximum cv. Tanzania (Tanzania quinea grass) in pasture establishment. The experiments were designed in randomized blocks, in a 2 × 5 × 4 factorial arrangement of two herbicides (fluazifop-p-butyl and glyphosate), five doses equivalent to the commercial dosage of each herbicide (0.25; 0.50; 1.00; 1.50; 200), and four evaluation times after herbicide application (15, 21, 30 and 45 days). There was interaction between doses and evaluation times. The dose 1.5 L ha-1 fluazifop-p-butyl provides efficient control of signalgrass, however, leads to high intoxication in Tanzania guinea grass. Glyphosate is efficient in the control of signalgrass even at the lowest dose (90 g ha-1), however, it causes high intoxication in Tanzania guinea grass, preventing its use in developing pastures. It can be concluded that fluazifop-p-butyl and glyphosate herbicides are not recommended for the control of B. decumbens, cv. Basilisk in developing pastures of Tanzania guinea grass.

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Section: Glyphosatesupporting

confidence: 88%

Chemical control of signalgrass for establishing Tanzania-grass

Rodrigues

Santos

Paschoaloto

et al. 2020

Acta Sci. Anim. Sci.

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“…is the most used herbicide to suppress Urochloa growth in intercropping systems (Almeida et al, 2018d;de Oliveira et al, 2019). According to Anésio et al (2017), applying nicosulfuron to Urochloa at a lower rate affords the suppression needed, without killing it. After corn harvest, the forage can be used as a cover crop or for grazing.…”

Section: Urochloa In Tropical and Subtropical Conservation Agriculturementioning

confidence: 99%

Urochloa in Tropical Agroecosystems

Baptistella¹,

Andrade

Favarin³

et al. 2020

Front. Sustain. Food Syst.

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Increasing biodiversity is an important issue in more secure and sustainable agriculture. Diversified systems are more resilient to climate change, environmental stresses and enhance soil health, nutrient cycling and nutrient use efficiency. In tropical agroecosystems, cover crops and intercrops are an alternative toward a more diverse and sustainable production. Urochloa spp. (syn. Brachiaria spp.) are perennial grasses, known for their high biomass production. They are commonly used as cover and companion crops in conservation agriculture in the tropics and the residues left in the field after cutting protect the soil and provide nutrient to the next crop cycle or intercropped culture. Urochloa species roots are vigorous, abundant and deep, as opposed to the more shallow and scarce roots of common crops. These traits contribute to carbon sequestration, soil organic matter stabilization and nutrient cycling. Urochloa roots also improve soil physical characteristics and influence soil nutrient dynamics, reducing nutrient losses and enhancing cycling, what is key to achieve greater nutrient use efficiency in agriculture. For instance, Urochloa root exudates can reduce nitrogen losses by denitrification and leaching through a process called biological nitrification inhibition; root exudates can mobilize recalcitrant phosphorus from soils and make it available for plant uptake; the deep roots of these grasses have the potential to recover nutrients that are virtually lost away from the root zone of other crops. This review compiles scientific progress regarding the introduction of Urochloa in agroecosystems, mainly on the aspects related to the contribution to more secure and sustainable agriculture.

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“…The sub-dose herbicide applications to nicosulfuron+atrazine (8+1500 g ha -1 ) suppressed greater than 50% of palisade grass (Urochloa brizantha) biomass in the off-season period (Jakelaitis et al, 2005). Mesotrione was reported to cause lesser plant intoxication in ruzigrass than nicosulfuron (Anésio et al, 2017;Sousa et al, 2018;Costa et al, 2020). Ceccon et al (2010) also verified the high capacity of injury recover of ruzigrass after mesotrion+atrazine (60+880 g ha -1 ) application in two development stages (14 and 24 days after emergency).…”

Section: Field Experimentsmentioning

confidence: 95%