CHLOROPHYLL FLUORESCENCE IN Brachiaria decumbens AND Brachiaria ruziziensis SUBMITTED TO HERBICIDES

Silveira, Rodrigo Richard da; Santos, Maurinho Luiz dos; Ferreira, Evander Alves; Santos, José Barbosa dos; Silva, Leandro Diego da

doi:10.1590/s0100-83582017350100042

Cited by 6 publications

(10 citation statements)

References 20 publications

(20 reference statements)

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“…The treatments were applied at 32 days after sowing. The forage was at the 4-6 tillers stage, intermediate between those proposed by Silveira et al (2017) and Brighenti et al (2011), and the corn was at the six-leaf stage (V6). Applications were made with a CO 2 pressurized sprayer equipped with a bar with a TeeJet 80.02 VS flat nozzle spray, at a constant pressure of 200 kPa, providing an application volume of 200 L ha -1 (Carvalho et al, 2015).…”

Section: Methodsmentioning

confidence: 81%

“…ha -1 maintained the reduction in height growth of Urochloa ruziziensis plants (Table 4). According to Silveira et al (2017), the effect of glyphosate at a dose of 360 g a.e. ha -1 on this forage's photosynthetic system, would intensify from 15 DAA, due to the cumulative effect of reduced energy transfer from the light capture system to photosystem II reaction centers.…”

Section: Resultsmentioning

confidence: 99%

“…L -1 of N-(phosphonomethyl) glycine, and nicosulfuron with 40 g a.i. L -1 , expressing the concentration of each product as usual in the literature (Cavalieri et al, 2008;Freitas et al, 2015;Silva et al, 2016;Silveira et al, 2017;Machado et al, 2018). Fertilization was carried out to meet the corn crop requirements with the application of 320 kg ha -1 of formulated fertilizer 5-25-15, which provided 16 kg of N 2 , 60 kg of P 2 O 5, and 48 kg of K 2 O, according to Vilela et al (2002).…”

Section: Methodsmentioning

confidence: 99%

“…More recently, there has been significant interest in the integration of corn with RR transgenic event associated with the species Urochloa ruziziensis, using the glyphosate herbicide in forage suppression as an alternative to the nicosulfuron herbicide (Silveira et al, 2017;São Miguel et al, 2018). This would combine a species with excellent characteristics such as forage and cover crops with a resistant crop to the herbicide that would allow active principle diversification, as well as good suppression of the forage for pasture or soil cover (Lima et al, 2014;Ceccon and Concenço, 2014;Jasper et al, 2015;Machado et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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MANAGEMENT OF Urochloa ruziziensis WITH GLYPHOSATE IN INTEGRATED SYSTEM WITH GLYPHOSATE-RESISTANT CORN

Corrêa

Pinto

Freitas

et al. 2019

Rev. Agric. Neotrop.

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This study aimed to evaluate the efficiency of the glyphosate doses in the suppression of Urochloa ruziziensis, to avoid the excessive competition of forage, intercropped with corn in an integrated crop-livestock system. The experiment was conducted in the experimental area of the Escola de Agronomia, of the Universidade Federal de Goiás with glyphosate-resistant corn (Zea mays L.) and Urochloa ruziziensis. The experimental design was randomized blocks with five treatments and four replications in a factorial scheme, with five herbicide doses x three evaluation periods. Treatments were control - non-sprayed, glyphosate herbicide at doses of 72, 144 and 288 g a.e. ha-1, and standard treatment of 8 g a.i. ha-1 of the nicosulfuron herbicide. The sowing was carried out in alternate rows of corn and forage with a spacing of 0.45 m between rows. The treatments were applied with corn at V6 vegetative stage and forage with 4-6 tillers, with evaluations at 7, 14, and 21 days after application. The dose of 72 g a.e. ha-1 of glyphosate, had no efficiency in forage suppression. The dose of 144 g a.e. ha-1 of glyphosate equaled the dose of 8 g a.i. ha-1 of nicosulfuron, which is the standard treatment in this intercropping system. Glyphosate at the dose of 288 g a.e. ha-1 caused the forage's death.

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Section: Methodsmentioning

confidence: 81%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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MANAGEMENT OF Urochloa ruziziensis WITH GLYPHOSATE IN INTEGRATED SYSTEM WITH GLYPHOSATE-RESISTANT CORN

Corrêa

Pinto

Freitas

et al. 2019

Rev. Agric. Neotrop.

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“…Research, Society and Development, v. 9, n. 8, e964986553, 2020 (CC BY 4.0 (Monteiro et al, 2016). Muito embora, ela também apresenta aptidão para planta daninha em culturas comerciais e pastagens (Silveira et al, 2017). O controle pode ser realizado com herbicidas especializados em monocotiledôneas, por exemplo, o glifosato que atuará através da inibição da enzima 5-enolpiruvilshikimato-3fosfato sintase ou fluazifop-p-butil que irá inibir a ação da acetil-CoA carboxilase (Silveira et al, 2019).…”

Section: Resultsunclassified

Levantamento fitossociológico das plantas daninhas em diferentes frutíferas de clima temperado no Município de Lavras – MG

Araújo

Souza

Pio

et al. 2020

RSD

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A fruticultura brasileira tem grande importância na economia, aparecendo como o terceiro maior produtor mundial. Neste contexto, o manejo de plantas daninhas torna-se indispensável do ponto de vista agronômico, pois competem por água, luz, nutriente e espaço, causando muitos prejuízos às culturas de interesse. Essas perdas se acentuam à medida que não são devidamente controladas, por este motivo, é realizado o levantamento fitossociológico, que permite conhecer a dinâmica das plantas daninhas e sua correta identificação. Objetivou-se com esse trabalho efetuar um levantamento fitossociológico das plantas daninhas existentes no cultivo de frutíferas de clima temperado no município de Lavras-MG. O levantamento foi realizado no setor de Fruticultura da Universidade Federal de Lavras (UFLA). Foi realizado o levantamento fitossociológico em 18 cultivares de Pereira (Pyrus spp.), sete cultivares de Macieira (Malus domestica L.), 22 cultivares de Pessegueiro (Prunus persica (L.) Batsch), sete cultivares de Framboesa, dez cultivares de Amora-Preta (Rubus spp.), além de área plantada com 11 cultivares de Caquizeiro (Diospyrus kaki L.), uma cultivar de Figueira (Ficus carica L.) e 34 cultivares de Marmeleiro (Cydonia oblonga e Chaenomelis sinensis L.). As identificações das plantas daninhas foram baseadas através de análise do material, fotografias e com consulta à literatura especializada, posteriormente a identificação, houve a classificação e análise da estrutura da comunidade, fazendo o agrupamento em famílias, nome científico, nome vulgar e quanto ao ciclo produtivo vegetal das espécies. Foram avaliadas Distribuição Espacial, Variância, Densidade, Frequência, Constância, Dominância, Valor de Importância, Índice de Valor de Importância e Avaliação de Similaridade. O levantamento fitossociológico evidenciou que a espécie Cyperus rotundus foi a espécie com maior IVI no cultivo da amoreira, framboesa, macieira e marmeleiro. Enquanto que a espécie Cynodon dactylon teve o maior IVI no cultivo das framboesas, pereiras e marmeleiros. Por outro lado, a espécie Brachiaria plantaginea atingiu o maior IVI no cultivo das macieiras. Por fim, a espécie Pennisetum clandestinum atingiu o maior IVI no cultivo dos caquizeiros. De acordo com o levantamento fitossociológico, deve-se verificar os métodos de controle utilizados como implementos agrícolas, formas de aplicação de inseticidas (sistêmicos ou contato), o sistema de irrigação que menos contribua para o desenvolvimento das espécies indesejáveis, e assim diminuir competição pela água, luz e nutrientes com o aumento da produtividade.

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Potensi Alellopati Ekstrak Gulma Alang Alang Sebagai Bioherbisida

Indarwati,

Jili,

Susilo

et al. 2023

japt

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The aim of this study was to determine the Alellopathy Potential contained in Imperata cylindrica extract as a Bio-herbicide. The research was conducted at the Experimental Garden of the Faculty of Agriculture; Wijaya Kusuma Surabaya University. This research method used completely randomized design (CRD); with 4 treatments and 6 replications. The treatments are (A0): Control; A1 : extract concentration ( 250 g/L) ; A2 : 500g/L ; (A3); 750 g / L. Observational data were analyzed using Analysis of Variant (ANOVA), then tested with 5% BNT. The results showed allelopathy contained in the extract of Imperata cylindrica L. can suppress weed seed germination up to 94.67 %; and has a negative effect on the initial growth of spiny spinach (Amaranthus spinosus L) seedling sprouts. With treatment A2 and A3 ; All weed seeds that were able to germinate grew abnormally (100%). Imperata cylindica extract has the potential to be used as a bio-herbicide (natural herbicide) to suppress the early growth of weed seeds on spinach spines.

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CHLOROPHYLL FLUORESCENCE IN Brachiaria decumbens AND Brachiaria ruziziensis SUBMITTED TO HERBICIDES

Cited by 6 publications

References 20 publications

MANAGEMENT OF Urochloa ruziziensis WITH GLYPHOSATE IN INTEGRATED SYSTEM WITH GLYPHOSATE-RESISTANT CORN

MANAGEMENT OF Urochloa ruziziensis WITH GLYPHOSATE IN INTEGRATED SYSTEM WITH GLYPHOSATE-RESISTANT CORN

Levantamento fitossociológico das plantas daninhas em diferentes frutíferas de clima temperado no Município de Lavras – MG

Potensi Alellopati Ekstrak Gulma Alang Alang Sebagai Bioherbisida

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