Integrated management of tough lovegrass (Eragrostis plana Nees): associating chemical control tools and plant physiology

Abstract

The objective of the study was to evaluate the efficiency of herbicides use in the control of tough lovegrass according to the availability of solar radiation and the presence or absence of flooded. Two experiments were conducted in a completely randomized design, in a 2x2x4 and 2x2x5 factorial scheme, where factor A was equivalent to the environment (natural or reduced radiation); factor B to water condition (with a 2 cm flooded or without); and, factor C the herbicides: cyhalofop butyl (315 g ha-1), glyphosate (1080 g ha-1), cyhalofop butyl + glyphosate (315 g ha-1 + 1080 g ha-1) and control (without application) in the first experiment. In the second experiment, the herbicides used were cyhalofop butyl (315 g ha-1), glyphosate (1080 g ha-1), sethoxydim (184g ha-1), imazethapyr (106 g ha-1) and control (without application). Glyphosate efficiently controls plants of tough lovegrass with four tillers (>90%), being superior to cyhalofop, imazethapyr and sethoxydim; independently, of resource conditions. Reduction in the availability of solar radiation generates less shoot dry mass production from the weed, and improves the control only by imazethapyr and cyhalofop. In general, a flooded condition does not affect tough lovegrass control by herbicides.

Germination, overcoming seed dormancy and endozoochory dispersal by cattle of native species from natural grassland

“…In order to preserve the natural grasslands, several efforts have been implemented as integrated management for controlling invasive plants (Faleiro et al, 2021(Faleiro et al, , 2022 and restoration strategies (Fonseca et al, 2013). Grassland restorations increase native plant cover and to achieve this goal one of the initial action is seed addition (Brudvig et al, 2017).…”

Germinação, superação da dormência de sementes e dispersão endozoocórica por bovinos de espécies nativas de pastagens naturais

“…A fim de preservar as pastagens naturais, vários esforços foram implementados, como o manejo integrado para o controle de plantas invasoras (Faleiro et al, 2021(Faleiro et al, , 2022 e estratégias de restauração (Fonseca et al, 2013).…”

“…A fim de preservar as pastagens naturais, vários esforços foram implementados, como o manejo integrado para o controle de plantas invasoras (Faleiro et al, 2021, 2022) e estratégias de restauração (Fonseca et al, 2013). A restauração de pastagens aumenta a cobertura vegetal nativa e, para atingir esse objetivo, uma das ações iniciais é a adição de sementes (Brudvig et al, 2017).…”

Glyphosate efficacy, absorption and translocation for Eragrostis plana control

“…control (Barroso et al, 2014). Herbicide options for E. plana management are limited, and, in general, are not as efficient as glyphosate when applied by themselves (Goulart et al, 2012;Faleiro et al, 2021). Therefore, farmers mostly rely on glyphosate mixtures to manage E. plana infestations.…”