Interações entre herbicidas e protetores para o controle de capim-annoni em pastagem natural

Goulart, Ives Clayton Gomes dos Reis; Nunes, Anderson Luís; Kupas, Valmir; Merotto, Aldo

doi:10.1590/s0103-84782012001000002

Cited by 9 publications

(6 citation statements)

References 13 publications

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“…Entretanto, a germinação da semente foi alta, acima de 70%. Esse resultado constitui um dado adicional para compreender o potencial agressivo da espécie e sua rápida capacidade de disseminação nos mais variados ambientes, já que um único indivíduo é capaz de produzir mais de 300.000 sementes (GOULART et al, 2012).…”

Section: Resultsunclassified

Avaliação da germinação de sementes de capim-annoni em Latossolos de diferentes granulometrias e níveis de compactação / Germination evaluation of love grass seeds in Oxisols of different granulometry and compaction levels

Mota¹,

Sequinatto²,

Sbrissia³

et al. 2021

BJDV

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RESUMOO capim-annoni (Eragrostis plana Nees) é uma planta capaz de se desenvolver em solos pobres, erodidos e degradados, o que favoreceu seu estabelecimento em diversas regiões dos biomas Pampa e Mata Atlântica na região Sul do Brasil. O crescimento desta planta ocorre inclusive em locais de solo compactado como, por exemplo, em beiras de estradas. Porém, não se tem informações da adaptação desta planta a condições adversas e/ou extremas. O objetivo deste trabalho foi avaliar a germinação do capim-annoni em solos de diferentes granulometrias submetidos à compactação. Foram conduzidos testes de germinação em Latossolos derivados de basalto (573 g kg -1 de argila e 215 g kg -1 de areia), arenito (202 g kg -1 de argila e 699 g kg -1 de areia) e arenito e basalto (306 g kg -1 de argila e 522 g kg -1 de areia), os quais foram compactados a 100%, 85% e 70% da densidade máxima. Os resultados demostraram que a germinação do capim-annoni foi menor em solos mais argilosos e a compactação dos diferentes solos não influenciou a germinação. Conclui-se que perdas na qualidade de solo, pouco influenciam no estabelecimento e desenvolvimento do capim-annoni tornando-o um problema ainda maior devido ao aumento progressivo das áreas degradadas.

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Section: Resultsunclassified

Avaliação da germinação de sementes de capim-annoni em Latossolos de diferentes granulometrias e níveis de compactação / Germination evaluation of love grass seeds in Oxisols of different granulometry and compaction levels

Mota¹,

Sequinatto²,

Sbrissia³

et al. 2021

BJDV

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“…The association of herbicides with different mechanisms of action is a recurrent practice that aims to increase the effectiveness of control in the weed community (VARGAS et al, 2013), especially in problematic plants, resistant and tolerant to glyphosate. However, this practice should be carried out with caution, because some researches show the possibility of antagonistic effects, and this fact impairs its effectiveness of control and selectivity to the crop (GOULART et al, 2012).…”

Section: Resultsmentioning

confidence: 99%

Weed management in glyphosate-resistant maize

et al. 2020

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The application of glyphosate associated with other herbicides is an important alternative for weed control in maize, to increase control spectrum and to minimize problems with resistance and tolerance from some species to the product. The objective of this work was to evaluate the efficacy, selectivity and effects on the grain yield components of glyphosate-resistant maize as a function of its application, associated or not with other pre- and postemergence herbicides. The design used was randomized blocks with four replications. Treatments consisted in the use of glyphosate combined with the herbicides: atrazine, [atrazine + simazine], [atrazine + oil], [atrazine + S-metolachlor], applied pre- and/or postemergence and [nicosulfuron + mesotrione] only postemergence, plus two controls, one weeded and one infested. The evaluated variables were maize phytotoxicity, weed control, ear insertion height, number of rows per ear, number of grains per row, one thousand grain mass and grain yield. Herbicide treatments caused low phytotoxicity to maize, less than 6%; control greater than 88, 95 and 95% for alexandergrass, turnip and sunflower, respectively, and did not affect grain yield components. The tested herbicides are selective to the hybrid Forseed 2A521 PW and effective in weed control. Weed control with weeding or herbicide increased maize Forseed 2A521 PW yield by 43%. The association of glyphosate with pre- or postemergence herbicides increased maize grain yield by approximately 14%.

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“…It is noteworthy that chemical weed control in pastures is the most widely used method to control these species, especially eudicotyledons. The weeds that are considered more difficult to control in pastures are the invasive grasses because of their morphological, physiological, and biochemical similarity with forage species and the lack of effective chemical control methods (Goulart, Nunes, Kupas, & Merotto, 2012;Marques, Marchi, Pinheiro, Marques, & Martins, 2019a). The main methods for applying herbicides in pastures are foliar application (spraying in total area or directed spray), cut stump application (spraying or brushing), basal application without cutting (spraying or brushing), and soil application.…”

Section: Chemical Methodsmentioning

confidence: 99%

Pasture weed biology and management in Brazil

Martins¹,

Marchi

Marques³

2022

Semina: Ciênc. Agrár.

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The livestock production model historically practiced in Brazil has a strong extractive bias, wherein the premise is to produce livestock with absolutely no concern for the preservation or renewal of environmental resources. The absence of technical criteria for the use of pastures has generated low productivity rates, making the activity unsustainable from both economic and environmental points of view. This scenario led the several sectors linked to the production chain to develop a package of strategies to solve the problems faced by livestock farmers. This package of strategies is conventionally called postmodern or corporate farming, in which the extractive process gives way to the business logic of avoiding waste and recovering profit margins mainly through pasture perpetuation. However, there is still a technical gap in corporate cattle farming related to problems caused by pasture weeds because all the concepts applied are derived or copied from concepts generated in agriculture. Furthermore, few researchers have studied or scientific articles written on elucidating the real problem of weeds in livestock production. Thus, the goal of the present review was to present some aspects related to weed ecology, their interference, and management alternatives in pasture areas, thereby collaborating with corporate livestock farming in Brazil because solutions to weed problems are crucial to increase commitment in all sectors of the production chain.

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Interações entre herbicidas e protetores para o controle de capim-annoni em pastagem natural

Cited by 9 publications

References 13 publications

Avaliação da germinação de sementes de capim-annoni em Latossolos de diferentes granulometrias e níveis de compactação / Germination evaluation of love grass seeds in Oxisols of different granulometry and compaction levels

Avaliação da germinação de sementes de capim-annoni em Latossolos de diferentes granulometrias e níveis de compactação / Germination evaluation of love grass seeds in Oxisols of different granulometry and compaction levels

Weed management in glyphosate-resistant maize

Pasture weed biology and management in Brazil

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