Glyphosate efficacy, absorption and translocation for Eragrostis plana control

Caratti, Fernanda Cassiane; Zaccaro, Maria Leticia M.; Noguera, Matheus M.; Avila, Luis Antônio de; Roma‐Burgos, Nilda; Lamego, Fabiane Pinto

doi:10.51694/advweedsci/2022;40:00017

Cited by 1 publication

(3 citation statements)

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“…For imazethapyr (184 g ai ha À1 ) inhibition ranged between 34% and 80%. Finally, when glyphosate (700 g ae ha À1 ) is applied with fluazifop-butyl (47 g ai ha À1 ), root translocation increases, thereby preventing rapid regrowth (Caratti et al, 2022).…”

Section: Chemical Controlmentioning

confidence: 99%

Section: Invasion Managementmentioning

confidence: 99%

“…Studies have evaluated glyphosate for E. plana control (Bastiani et al, 2021; Caratti et al, 2022; Faleiro et al, 2022). In plants with four tillers, 1080 g ae ha −1 of glyphosate controlled over 90% (Faleiro et al, 2021), and at the 2–3 tiller stage, 700 g ae was enough to control it (Caratti et al, 2022). Bastiani et al (2021) found that the potassium salt in glyphosate had the fastest activity in different E. plana growth stages, but panicle initiation was the most vulnerable, and adding ammonium sulphate to the herbicide mix tank increased the control of drought‐stressed plants.…”

Section: Invasion Managementmentioning

confidence: 99%

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Biology of the invasive species Eragrostis plana in Southern Brazil: What have we learned and how may this help us manage it?

Zabala‐Pardo,

Lamego

2024

Weed Research

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Since its accidental introduction in 1951, the South African species Eragrostis plana has invaded a large part of the Pampa biome in South America, a highly diverse grassland ecosystem that has coexisted with livestock since its introduction at the beginning of the 17th century. E. plana, a perennial tussock grass with a deep and abundant root system, is resistant to frost and cattle grazing, and a successful competitor for environmental resources. The species is diploid, C4 dispersed endozoochorically, and flowers in late spring and early summer, with optimal germination occurring at 35°C and viability up to 39–40°C. It is allelopathic because it produces several phenols and alkaloids. Extreme soil disturbance or intense grazing favours initial invasion. Nonetheless, grazing exclusion enhances E. plana competition and affects the grassland community and diversity. E. plana is highly tolerant to interspecific competition, especially with grasses exhibiting a similar growth habit. Under water stress, it responds faster by increasing its root system by 66% more than native grass. Moreover, antioxidant system activity increases, and the species recovers quickly through osmolyte production. In non‐invaded fields, avoiding soil disturbance and intensive grazing are key strategies to preserving Biome Pampa. Nonetheless, in fields where the invasion has already occurred, grazing must be maintained, cattle quarantined practiced, along with strategies that reduce cover and prevent the spread of E. plana. Liming and fertilising native grasslands improve their potential to compete with E. plana. The wiper applicator, a device that allows glyphosate herbicide application selectively to E. plana, is an important component of the integrated weed management system, especially with very severe infestations. Establishing strategies to contain or manage E. plana should be a priority to preserve the biodiversity of the Pampa. In the future, innovative options could also help prevent new invasions.

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Section: Chemical Controlmentioning

confidence: 99%