Seletividade e eficiência de herbicidas no controle de plantas daninhas na cultura do feijão-caupi

Mancuso, Mauricio Antonio Cuzato; Aires, Bruno Corrêa; Negrisoli, E.; Corrêa, Marcelo Rocha; Soratto, Rogério Peres

doi:10.1590/0034-737x201663010004

Cited by 21 publications

(36 citation statements)

References 14 publications

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“…The use of fomesafen, applied at early or late stages of cowpea (Mancuso et al, 2016) and of alachlor and s-metolachlor doses on carioca beans (Lamego et al, 2011) did not affect the 1,000 grain weight, which is in line with what was observed in this research.…”

Section: (A) (B)supporting

confidence: 91%

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Weed Management in Beans Using Subdoses of Fluazifop-P-Butyl + Fomesafen

et al. 2018

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-The objective of this work was to evaluate the effect of reduced doses of the commercial mixture composed of fluazifop-p-butil + fomesafen, applied for the management of common weeds in beans. The experiment was conducted in a completely randomized block design, with a 5x2+1 factorial arrangement and with four replications. In factor A, there were five percentual doses (100, 87.5, 75.0, 62.5 and 0.0%), in relation to the recommended commercial dose (2 L ha -1 ) of fluazifop-pbutil + fomesafen, which corresponded to 2.00; 1.75; 1.50; 1.25 and 0.00 L ha -1. Factor B was composed by two development stages of black beans (three and eight trefoils) and weeds: black-jack (two to four and four to eight leaves) and southern crabgrass (two leaves to one tiller and one to four tillers) with one weeded control treatment. The variables evaluated for the control of black-jack and southern crabgrass were: herbicide phytotoxicity to the crop, number of pods per plant, number of grains per pod, 1,000 grain weight and grain yield of the crop. The results demonstrated that the use of fluazifop-p-butil + fomesafen, at all evaluated doses evaluated and application periods, caused low phytotoxicity to the crop, less than 12%. The use of reduced doses of this herbicide presents efficient control of black-jack and southern crabgrass, mainly at the initial development stages of these weed species. The economic threshold dosage of fluazifop-p-butil + fomesafen to control these weeds was 1.23 L ha

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Section: (A) (B)supporting

confidence: 91%

“…The weed stage becomes essential for a good herbicide efficiency, especially for fomesafen, when applied on cowpea, for the management of fireplant, black-jack, Benghal dayflower and clover (Mancuso et al, 2016).…”

Section: Resultsmentioning

confidence: 99%

Weed Management in Beans Using Subdoses of Fluazifop-P-Butyl + Fomesafen

et al. 2018

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“…These herbicides caused reduction in germination process, with inferiority of 15.94, 5.80 and 2.48% respectively. Mancuso et al (2016) verified higher phytotoxicity of the herbicide diclosulam in seedlings after nine days of emergency.…”

Section: Resultsmentioning

confidence: 79%

Residual effect of pre-emergent herbicides on the initial development and biochemical composition of snap bean seedlings

et al. 2017

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-The use of herbicides must be made in a rational way, giving priority to reduce possible adverse effects on subsequent crops. The objective was to evaluate the residual effect of pre-emergent herbicides on growth and initial development as well as the biochemical composition of snap bean seedlings. The experimental design used was the completely randomized, with four replications in factorial scheme 3x4, three snap bean cultivars (Macarrão Favorito, Macarrão Preferido e Macarrão Trepador) and three pre-emergent herbicides, plus a control (without herbicide). Was use the residual doses of pre-emergent herbicides sulfentrazone in 0.3 g ha -1 , diclosulam in the concentrations of 0.126 g ha -1 and imazethapyr in 0.05 g ha -1 . The work was developed in a seeds analyze laboratory with the purpose of minimizing possible adverse effects of the environment. The seeds were sowing on germitest paper moistened with solutions containing the herbicides, with each respective treatment. The following characteristics were evaluated: germination (GER), germination speed index (GSI), seedling length (SL) and seedling dry mass (SDM) and soluble protein content (PROT) in addition to the enzymatic activity of catalase (CAT), peroxidase (PER) and phenylalanine ammonia-lyase (PAL). The phytometric variables SL, SDM, GER and GSI reduced in the presence of herbicides, and for the levels of PROT and enzymatic activity of CAT, PER and PAL there was observed a variation according to the genotype. The sulfentrazone showed up as the product of higher toxicity, as well as the Macarrão Trepador as the genotype with lower tolerance.

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“…Uma vez não controladas, as plantas daninhas competem pelos recursos essenciais ao desenvolvimento da cultura como água, luz e nutrientes. Essa competição pode ocasionar perdas de até 90% no rendimento de grãos e consequentemente reduzir a produção e o lucro (MANCUSO et al, 2016).…”

Section: Introductionunclassified

“…Um dos principais métodos de controle de plantas daninhas em uma cultura é a utilização do controle químico com herbicidas (MANABE et al, 2014), pois permite alta eficácia de controle e redução de custos na produção (MANCUSO et al, 2016). Porém, para o feijão-caupi, ainda há escassez de informações sobre a seletividade dos herbicidas à cultura, sendo ainda muito comum a utilização de controle com capinas, com baixo rendimento operacional, além do controle cultural FONTES et al, 2013).…”

Section: Introductionunclassified

Levantamento Fitossociológico De Plantas Daninhas Na Cultura Do Feijão-Caupi No Agreste Alagoano

Oliveira¹,

Canuto²,

Canuto³

2017

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RESUMOO cultivo de feijão-caupi no Agreste Alagoano consiste em uma atividade importante para o abastecimento do mercado consumidor de Alagoas e estados vizinhos. No entanto, as plantas daninhas constituem um fator biótico prejudicial ao desenvolvimento da cultura por competir por água, nutrientes e luz. Com o objetivo de avaliar a comunidade infestante em feijão-caupi cultivado em sucessão ao amendoim, foi realizado um levantamento fitossociológico e a mensuração da fitomassa verde e seca de cada espécie de planta daninha. O experimento foi conduzido no Sítio Pai João, no município de Taquarana, na região Agreste do Estado de Alagoas. As espécies de plantas daninhas foram identificadas e quantificadas pelo método do quadrado inventário (0,5 x 0,5 m), com 50 amostragens realizadas em 100 ha de cultivo de feijão-caupi, aos 30 dias após a semeadura. Foram determinados a frequência, a densidade, a abundância, a frequência relativa, a densidade relativa, a abundância relativa e o índice de valor de importância. Além desses parâmetros, foram avaliadas a massa verde e a massa seca das plantas daninhas. A comunidade infestante na área cultivada com feijão-caupi foi composta por 27 espécies de plantas daninhas, pertencentes a 14 famílias botânicas, havendo predominância de plantas das famílias Poaceae e Asteraceae. As espécies mais abundantes foram, Emilia fosbergii, Amaranthus hybridus, Commelina benghalensis e Eleusine indica, sendo esta última a espécie que apresentou o maior índice de valor de importância. PALAVRAS-CHAVE: competição, fitossociologia, Vigna unguiculata (L.) Walp. PHYTOSOCIOLOGICAL SURVEY OF WEEDS IN COWPEA-BEAN CROP IN AGRESTE ALAGOANO, STATE OF ALAGOAS, BRAZILABSTRACT The cowpea production in Agreste region in the Alagoas Province is an activity of great importance in supplying the consumer market of Alagoas and neighboring states. However, the weeds are a biotic factor detrimental to the development of the crop because it competes for water, nutrients and light. In order to evaluate the weed

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Seletividade e eficiência de herbicidas no controle de plantas daninhas na cultura do feijão-caupi

Cited by 21 publications

References 14 publications

Weed Management in Beans Using Subdoses of Fluazifop-P-Butyl + Fomesafen

Weed Management in Beans Using Subdoses of Fluazifop-P-Butyl + Fomesafen

Residual effect of pre-emergent herbicides on the initial development and biochemical composition of snap bean seedlings

Levantamento Fitossociológico De Plantas Daninhas Na Cultura Do Feijão-Caupi No Agreste Alagoano

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