A5024222098- Weed Control and Herbicide Applications
- Pesticide and Herbicide Environmental Studies
- Agronomic Practices and Intercropping Systems
- Soybean genetics and cultivation
- Growth and nutrition in plants
- Soil Management and Crop Yield
- Allelopathy and phytotoxic interactions
- Seed Germination and Physiology
- Crop Yield and Soil Fertility
- Plant tissue culture and regeneration
- Banana Cultivation and Research
- Legume Nitrogen Fixing Symbiosis
- Agriculture, Plant Science, Crop Management
- Agriculture and Biological Studies
- Cassava research and cyanide
- Agriculture, Soil, Plant Science
- Plant Growth Enhancement Techniques
Universidade Federal de Pelotas
2013-2020
A habilidade competitiva constitui-se em importante ferramenta para o manejo integrado de plantas daninhas. Objetivou-se com este trabalho avaliar potencial cultivares trigo competir as daninhas azevém e nabo, diferentes períodos convivência. O delineamento experimental foi blocos ao acaso, arranjado esquema fatorial 4 x 2 3, três repetições. No fator alocaram-se os (BRS Guamirim - ciclo precoce estatura baixa; Fundacep Cristalino média; Raízes médio BRS 296 alta); no B, a ausência ou...
Among the methods of weed control, stands out chemical control. However, even selective, herbicides can trigger production reactive species oxygen and cause oxidative stress. The aim study was to evaluate changes in photosynthetic parameters, damage, antioxidant enzyme activity altered metabolism rice plants after applying pre-emergent herbicides. experiment conducted a greenhouse used were oxadiazon, pendimethalin oxyfluorfen, beyond control without herbicide. There reduction rate...
A antecipação da colheita soja é possível com uso prática de dessecação pré-colheita, a qual reduz o tempo permanência das sementes no campo, após maturação fisiológica. O objetivo deste trabalho foi avaliar efeito época aplicação do herbicida paraquat, como dessecante na pré-colheita soja, sobre produtividade e qualidade fisiológica sementes. constou duas etapas: um experimento em conduzido município Jaboticaba-RS, safra 2010/2011, uma análise Os tratamentos consistiram três épocas paraquat...
Conyza bonariensis tornou-se a principal planta daninha da cultura soja no Sul do Brasil, em decorrência evolução para resistência ao herbicida glyphosate. O objetivo deste trabalho foi avaliar o efeito de diferentes coberturas inverno e associação manejo dessecação pré-semeadura soja, visando controle C. resistente Um experimento conduzido campo, na safra 2010/2011. Os tratamentos foram conduzidos esquema parcelas subdivididas, que as alocadas nas principais: aveia-preta, nabo, ervilhaca,...
ABSTRACT: Weed competition limits wheat yield by reducing the availability of essential resources for its growth and development. In this sense, study aimed to estimate economic threshold level (ETL) wild radish (Raphanus raphanistrum) in with cultivars. Treatments were arranged a factorial scheme. The factor cultivar consisted early (BRS 328), medium 177), late Umbu) cycles population ranged from 0 564 plants m-2 (10 populations) BRS 328, 472 177 (11 populations), 724 Umbu populations)....
ABSTRACT: Weeds emergence times modify competition with crops. Thus, the hypothesis was that increase in weed flow decreases period prior to interference (PPI) soybeans and increases critical of prevention (CPIP). The objective determine PPI CPIP weeds soybean crops as affected by preferred time flow. Three experiments were conducted field a randomized block design four replications. treatments arranged factorial factor A consisting coexistence or control B for eight periods (0, 7, 14, 21,...
ABSTRACT Understanding the physiological defense behavior of plants subjected to herbicide application may help identify products with higher or lower capacity cause oxidative stress in crops. This study aimed at evaluating effect herbicides antioxidant activity rice plants. The experimental design was completely randomized, six replications. Treatments consisted bentazon (photosystem II inhibitor; 960 g ha-1), penoxsulam (acetolactate synthase 60 cyhalofop-butyl (acetyl coenzyme-A...
Nos Estados do Rio Grande Sul e Paraná, há frequentes relatos de falhas controle Conyza sumatrensis com chlorimuron-ethyl em lavouras soja. Assim, os objetivos deste trabalho foram caracterizar morfologicamente as folhas avaliar o herbicidas aplicados biótipos dessa planta daninha três estádios desenvolvimento. Foram realizados dois estudos, experimentos casa vegetação, delineamento inteiramente casualizado quatro repetições. No primeiro estudo, buva coletados identificados; já no segundo...
ABSTRACT The resistance of weeds to herbicides is a consequence one or more mechanisms in the plant, responsible for not allowing herbicide act properly at active site. objective this study was investigate mechanism(s) glyphosate Conyza bonariensis. An experiment conducted November and December, 2012 repeated February March, 2013 using factorial arrangement treatments, where factor A corresponded biotypes hairy fleabane, susceptible (S) resistant (R); B seven rates from 0 11,520 g e.a. ha-1,...
O feijoeiro é uma cultura de ciclo vegetativo curto, bastante sensível à interferência plantas daninhas. objetivo deste trabalho foi avaliar a eficácia herbicidas aplicados em pré-emergência no controle Digitaria sanguinalis na do feijão-carioca, bem como determinar seletividade deles para cultura. Os tratamentos avaliados foram: S-metolachlor (960, 1.440 e 1.920 g ha-1), alachlor (1.440, 2.400 ha-1) duas testemunhas sem aplicação (com capinas). Avaliações visuais D. fitotoxicidade o feijão...
Understanding spatial distribution of weeds in the crop enables to perform localized herbicide applications, increasing technical and economic efficiency operations reducing environmental impacts. This work aimed characterize phytosociological variability occurring soybean commercial field. It was conducted an agricultural area located at municipality Boa Vista das Missões - RS, during 2010/2011 harvest season. The area, that had been managed under no-tillage with monoculture (summer) for...
Biotic and abiotic stresses, either individually or in combination, may affect soybean growth development negatively, besides competitiveness with weeds. This study aimed at evaluating the effect of heat stress plant recovery on crop–weed interaction by analyzing variables. Experiments were set up as replacement series slender amaranth. Treatments followed a factorial scheme, which was composed [high temperature (38/22 ± 2 °C) against control (28/22 ºC)] proportions amaranth, i.e., 100:0...
ABSTRACT: In Brazil, horseweed is one of the most important weeds because resistance to herbicides and high competitive for crops. A large losses were reported in major crops such as soybeans, wheat corn, where use a no-tillage system herbicide promote better establishment. correct understanding way temperature influences germination enables prediction regions with highest potential colonization by this weed thus facilitates its control. The objective study; therefore, was discern ways...
RESUMOO azevém é uma planta daninha de ciclo anual, encontrada em praticamente todas as lavouras inverno, pomares e vinhedos da região Sul do Brasil. A espécie normalmente controlada pelo herbicida glyphosate, no entanto, o uso continuado desse produto selecionou biótipos resistentes. Diferenças na suscetibilidade a herbicidas têm sido atribuídas características morfológicas, anatômicas genéticas das plantas. Os objetivos deste trabalho foram realizar caracterização morfoanatômica, adequar...
ABSTRACT The intense use of glyphosate for weed control led to the emergence several cases resistance this herbicide. Weeds can survive application herbicides due factors, which may or not be related herbicide site action. objectives study were quantify accumulation shikimate in ryegrass biotypes response application; investigate possible mutations on EPSPs gene susceptible and resistant biotypes; evaluate after treatment with a metabolism inhibitor cyt P450 monooxygenase. seeds suspected...
The Wild Poinsettia (Euphorbia heterophylla L.) has elevated potential to reduce the soybean yield and is a difficult control plant due herbicide resistance. objectives of this study were determine changes in photosynthetic physiological parameters, secondary metabolite levels, cellular damage, antioxidant system activity plants biotypes with low level resistance or susceptibility glyphosate competition soybeans. Two replacement series experiments conducted greenhouse under between soybeans...
O surgimento de biótipos plantas daninhas resistentes a herbicida e o aumento da pressão social para reduzir sua utilização, criou necessidade desenvolver ferramentas aperfeiçoar aplicação herbicidas melhorar controle daninhas. Desta forma, desenvolvimento modelos emergência tornou-se crucial estratégias gerenciamento em áreas agrícolas. Esta revisão tem por objetivo apresentar os fatores que influenciam fluxo daninhas, principais utilizados, procedimentos modelagem impactos práticos...
Biotic and abiotic factors such as competition with weeds water deficit may cause significant losses to soybean productivity. This study aimed at evaluating the effect of plant recovery in interaction between (Glycine max) slender amaranth (Amaranthus viridis) by using growth variables. A replacement series experiment was performed treatments were arranged a factorial scheme; they composed two regimes (field capacity (50% field capacity)) different proportions (100:0, 50:50 0:100%). Water...
O surgimento de biótipos plantas daninhas resistentes a herbicida e o aumento da pressão social para reduzir sua utilização, criou necessidade desenvolver ferramentas aperfeiçoar aplicação herbicidas melhorar controle daninhas. Desta forma, desenvolvimento modelos emergência tornou-se crucial estratégias gerenciamento em áreas agrícolas. Esta revisão tem por objetivo apresentar os fatores que influenciam fluxo daninhas, principais utilizados, procedimentos modelagem impactos práticos...