E. D. Velini

• São Paulo State University

This study investigates the potential of macrophytes as biostimulants in agricultural applications through a two-stage experimental approach. In the first stage, a screening experiment evaluated 12 macrophyte species using ethanolic and potassium chloride extracts at two doses (1 and 5 kg fresh biomass/ha) applied to bioindicator species Cucumis sa...

This study investigates the potential of macrophytes as bio-stimulants in agricultural applications through a two-stage experimental approach. In the first stage, a screening experiment evaluated 12 macrophyte species using ethanolic and potassium chloride extracts at two doses (1 and 5 kg fresh biomass/ha) applied to bioindicator species Cucumis s...

A escolha dos métodos de controle de plantas daninhas em pastagens varia de acordo com as características locais, incluindo as espécies de plantas daninhas a ser controladas, a pastagem, as condições do solo, o clima, o tamanho da propriedade e o nível de tecnologia utilizado. Os métodos de manejo de plantas daninhas em pastagens são diversos, incl...

Espanhol El manejo de malezas es fundamental para la eficiencia de las actividades humanas, con énfasis en la producción agrícola, ganadera y forestal. Pero además, las malezas también pueden afectar las actividades industriales, de transporte, la generación y producción de energía y la preservación y recuperación ambiental. Específicamente en área...

Espanhol El manejo de malezas es fundamental para la eficiencia de las actividades humanas, con énfasis en la producción agrícola, ganadera y forestal. Pero además, las malezas también pueden afectar las actividades industriales, de transporte, la generación y producción de energía y la preservación y recuperación ambiental. Específicamente en área...

Espanhol El manejo de malezas es fundamental para la eficiencia de las actividades humanas, con énfasis en la producción agrícola, ganadera y forestal. Pero además, las malezas también pueden afectar las actividades industriales, de transporte, la generación y producción de energía y la preservación y recuperación ambiental. Específicamente en área...

Soybean cultivars show a beneficial response to low doses of glyphosate, leading to increased growth, biomass, and improved agronomic traits. However, the genetic, biochemical, and metabolic mechanisms underlying this positive response, known as glyphosate hormesis, are not fully understood. This study aimed to identify pathways and differentially...

Brazil, the world’s largest soybean producer, owes its success to the cultivation of glyphosate-resistant (GR) cultivars. However, the soybean yields lag behind those obtained in areas managed for high productivity. Glyphosate-induced hormesis holds promise for increasing crop yields, but the potential evolution of resistance in certain weed specie...

Herbicide leaching studies are extremely important to evaluate the environmental behavior of these products in the environment. However, there are no equivalence analyses in the literature of the most commonly used methods: bioassays and HPLC. Therefore, the present study aimed to analyze the leaching of the herbicides imazapic (147 g ai ha⁻¹) and...

Farmers often use glyphosate for cost-effective land clearance to streamline coffee harvest processes despite recommendations against its application near the harvest period. However, as set by national and international regulatory authorities, this practice poses a high risk of exceeding the maximum residue limit (MRL) for glyphosate in coffee bea...

Straw from no-till cropping systems, in addition to increasing the soil organic matter content, may also impede the movement of applied herbicides into the soil and, thus, alter the behavior and fate of these compounds in the environment. Rain or irrigation before or after an herbicide treatment can either help or hinder its movement through the st...

Low glyphosate doses that produce hormesis may alter the susceptibility to herbicides of weeds or enhance their propagation and dispersal. The objective of this work was to evaluate the hormetic effects of glyphosate on the vegetative, phenological and reproductive development in resistant (R) and susceptible (S) Conyza sumatrensis biotypes. The gl...

Glyphosate application, even in low doses, changes the metabolism of crops. This research aimed to evaluate the effects of glyphosate low doses and sowing season on metabolic changes of early-cycle common beans. Two experiments were conducted in the field, one in the winter season and one in the wet season. The experimental design was a randomized...

Glyphosate is a nonselective herbicide of systemic action that inhibits the enzyme 5-enolpyruvylshikimate-3-phosphate synthase, thus compromising amino acid production and consequently the growth and development of susceptible plants. The objective of this study was to evaluate the hormetic effect of glyphosate on the morphology, physiology, and bi...

The presence of weeds in forest estates is considered one of the biggest problems in the implantation, maintenance, and renovation of eucalyptus plantations. This research aims to evaluate the phytotoxicity of herbicides on eucalyptus and I. nil. The experiment was installed inside a greenhouse in a completely randomized design with five replicatio...

2,4-D and dicamba are used in the postemergence management of eudicotyledonous weeds in different crops, most of which are grown under no-tillage systems. Due to the application methods for these products, their dynamics in straw and their residual action in soil have rarely been explored. Thus, the objective of this study was to evaluate the dynam...

Dicamba is a post-emergence herbicide commonly used to control broadleaves in cereal crops. However, a portion of the herbicide might reach soil surface, and many factors could affect its dynamics and effects. The objective of this research was to evaluate the dynamics of dicamba applied to the soil, to the soil and covered with straw and over the...

The detection and monitoring of soybean rust (SBR) through remote sensing is promising because of the importance of the crop and the aspects of the disease. We evaluated the effects of different levels of SBR severity on soybean [Glycine max (L.) Merr.] leaflets reflectance aiming for the construction of a disease classification model. Leaflet refl...

The application of remote sensing techniques and prediction models for soybean rust (SBR) monitoring may result in different fungicide application timings, control efficacy, and spraying performance. This study aimed to evaluate the applicability of a prediction model as a threshold for disease control decision-making and to identify the effect of...

Dicamba can be included in weed management programs for Brazilian agricultural crops, such as Conyza spp. and Amaranthus spp., and it is essential to implement good management practices that include salts with low volatility levels and appropriate associations to maintain volatility at acceptable levels. The objective of this study was to evaluate...

Changes in photosynthetic machinery can induce physiological and biochemical damage in plants. Low doses of glyphosate have been shown to exert a positive effect in mitigating the deleterious effects of water deficit in plants. Here, the physiological and biochemical mechanisms of safflower plants (Carthamus tinctorius L.) were studied under condit...

The use of pre-emergent herbicides is important for the current agricultural production systems that present weeds resistant to herbicides. Considering the complexity of using these products, the objective of this work was to evaluate their selectivity and residual weed control in soybean crops and their effect on the weeds Amaranthus hybridus, Bid...

Mefenpyr-diethyl is a foliar-acting safener of the pyrazoline chemical group, and after its absorption, the metabolization and detoxification of herbicides occur in treated plants. Studies have demonstrated the protective effect of this safener for the herbicide fenoxaprop-P-ethyl in grass. Thus, this work aimed to evaluate whether a tank mixture o...

A mucuna-preta é uma leguminosa anual, que nos últimos anos assumiu posição de destaque como uma importante planta daninha em várias regiões. O controle químico constitui-se umas das principais ferramentas de manejo de plantas daninhas, contudo, diferentes condições climáticas podem influenciar consideravelmente a eficácia de muitas moléculas. O gl...

Mefenpyr-diethyl is a safener used for protection of cereal plants under applications of ACCase and ALS inhibitor herbicides. Current studies are describing safeners using a new approach, relating these products to stimulation action on plants. The objective of this work was to evaluate the stimulation action of mefenpyr-diethyl on soybean, wheat,...

required. Maize with cp4-epsps and pat genes is tolerant to glyphosate and glufosinate-ammonium herbicides and has been a tool used for weed control. However, there is a demand for new studies to assess how tolerant it is and to avoid yield losses. The objective of this study was to assess the selectivity of the 2B810PW hybrid, which has the cp4-ep...

Algumas substâncias podem ser utilizadas como protetores químicos para aumentar a tolerância de culturas a herbicidas, incluindo alguns micronutrientes como é o caso do selênio. O uso de herbicidas em pastagem vem sendo cada vez mais comum no manejo das plantas daninhas, esse trabalho teve como objetivo avaliar o selênio como protetor químico na se...

The transgenic Liberty Link® (LL) soybean is tolerant to glufosinate, conferred by the enzyme phosphinothricin acetyltransferase (PAT), which is encoded by the pat gene from Streptomyces viridochromogenes. Because symptoms of injury can be observed in soybean [Glycine max (L.) Merr.] plants in some situations, this study evaluated the effects of ra...

More than 80% of soybean [ Glycine max (L.) Merr.] in Brazil is cultivated in no-till system and although cover crops benefit the soil, they may reduce the amount of residual herbicides reaching the soil, thereby decreasing efficacy. The objective of this study was to evaluate applied alone, sequentially after glyphosate, and in tank-mixture with g...

Several maize hybrids that present the phosphinothricin acetyltransferase gene (pat) are available in the market. However, these hybrids have different resistance levels to glufosinate herbicides. The objective of the present work was to evaluate the resistance of maize hybrids containing the pat gene (as a selection marker) to glufosinate. Field e...

Eucalyptus harvests generate residues that remain on the soil and affect the efficacy of preemergent herbicides in the following planting cycle. The objective of this work was to evaluate the dynamics of flumioxazin, sulfentrazone, and isoxaflutole herbicides applied on different amounts and compositions of eucalyptus harvest residues subjected to...

Glyphosate is used frequently in agriculture, and sourgrass (Digitaria insularis (L.) Mez ex Ekman) has become one of the most problematic weeds in Brazil because of its resistance to this herbicide. One of the alternatives for sourgrass control is the use of graminicide alone or in mixture with glyphosate. Thus, this experiment was aimed at evalua...

The objective of this study was to identify and quantify herbicide residues in water samples of rain, cisterns, streams, ponds, springs, semi-artesian wells, dams and a river in the Rio Samambaia sub-basin in the Federal District and eastern Goiás. A total of 287 samples were collected from 20 farms in the sub-basin in the rainy (February, summer)...

Putative glyphosate-resistant sourgrass was collected to determine the resistance level and to evaluate the metabolic profile after resistance. While accumulation of shikimic acid is known to occur in glyphosate-susceptible populations, differences in resistant (R) and susceptible (S) biotypes accumulation of quinic and salicylic acid and AMPA have...

BACKGROUND Stimulation of plant growth by low doses of a toxic compound is defined as a hormetic effect. Exposure of plants to low doses of glyphosate can cause stimulatory effects on growth or other variables. Sugarcane is the major biofuel and sugar‐production crop cultivated in Brazil, but its expansion to new areas is limited; therefore, there...

Urochloa decumbens plants may be reached by herbicide drift from applications of glyphosate from neighboring areas or by variations during applications. Considering the different phenological stages and size of plants in these areas, the amount of active ingredient that reaches the plants probably varies. The objective of this study was to evaluate...

The objective of this work was to evaluate the effect of glyphosate herbicide as growth regulator on two turfgrasses bahiagrass and broadleaf carpetgrass. The experiments were conducted in a greenhouse, using a completely randomized design, with 10 glyphosate rates (0, 5.625, 11.25, 22.5, 45, 90, 180, 360, 720, and 1.440 g a.e. ha-1) and four repli...

O herbicida indaziflam apresenta atividade residual no solo e pode se tornar problema para os cultivos agrícolas, pela possibilidade de carryover em culturas sucessoras. Assim, objetivou-se selecionar potenciais espécies bioindicadoras para presença de resíduos do indaziflam no solo. Foram realizados dois experimentos em casa de vegetação, utilizan...

Salicylic acid (SA) and acibenzolar-S-methyl (ASM) can be used as biotic/abiotic stress attenuators in plants, thus, there are few studies that reduce the negative effects of herbicide use on plants. Therefore, this study aimed the effect of SA and ASM as attenuators of phytointoxication caused by chlorimuron-ethyl in soybean crop. The experiment w...

The aim of this work was to evaluate the use of the naphthalic anhydride safener on the protection of common bean cultivars BRS-Estilo (carioca) and BRS-Esplendor (black) from negative effects of herbicides. Two experiments were conducted, one for each cultivar in a complete randomized design with five replications, in a 6 × 3 factorial scheme, wit...

A espécie Urochloa decumbens é uma importante planta daninha de culturas agrícolas devido à alta capacidade adaptativa e dificuldade de manejo. A presença dessas plantas em áreas de produção agrícola pode gerar problemas quando compete por água, luz e nutrientes, além de atuar como hospedeira de pragas e patógenos comuns à cultura e interferir na c...

The objective of this article was to evaluate the effects of glyphosate on the initial development of eucalyptus (Eucalyptus urograndis) after its application on brachiaria (signal) grass plants (Brachiaria decumbens). The experiment was conducted in a greenhouse in a completely randomized design. Glyphosate, aminomethylphosphonic acid (AMPA) and s...

This work is the first one after the consolidation of the introduction of the RR technology in maize and soybean crops, following weed surveys previously carried out in the region of the Middle Paranapanema, São Paulo state. The objective was to carry out a phytosociological survey of weeds in off-season maize crops no-tillage, in the same properti...

The use of herbicides is widespread in weed management, and adjuvants are added to the spray solution to improve the effectiveness of applications. The goal was to evaluate the influence of adjuvants added to the herbicides saflufenacil and glyphosate, isolated or in combination, and the effects on the surface tension, deposition and effectiveness...

This study aimed to assess the response of Urochloa decumbens plants to different doses of glufosinate ammonium, and the sensitivity of plant population to the herbicide. Two studies were conducted, both in greenhouse and repeated at different times. In the dose-response analysis, two experiments were conducted using seven doses of the glufosinate...

In Brazil, ryegrass (Lolium multiflorum) has been identified as resistant to glyphosate, becoming a major problem, especially in crops cultivated in the winter season. This herbicide can indirectly affect photosynthesis by inhibiting biosynthesis of many compounds. Thus, the aim of this study was to investigate the influence of glyphosate on the ph...

The objective of this work was to evaluate the effect of applying mixtures of chemical ripeners on the technological quality and agricultural productivity of sugarcane. The experimental design consisted of randomized blocks arranged in split- split-plots with four blocks, the main plots being constituted by sugarcane varieties SP803280 and SP801842...

O extensivo uso de glyphosate tem selecionado plantas daninhas de difícil controle e uma das alternativas para contornar este problema é a associação de diferentes herbicidas e adjuvantes ao glyphosate. Objetivou-se avaliar os efeitos na deposição e eficácia dos herbicidas saflufenacil e glyphosate isolados ou em mistura com adição de adjuvantes ap...

Introduction: Sublethal doses of herbicides can enhance plant growth and stimulate other process, an effect known as hormesis. The magnitude of hormesis is dependent on the plant species, the herbicide and its dose, plant development stage, and environmental parameters. Glyphosate hormesis is well established, but relatively little is known of the...

The sensitivity of weed species to herbicides is variable, and the behavior can be repeated or not in the next generation. The objective of this study was to evaluate the response of morningglory plants to different doses of glufosinate ammonium and the sensitivity of plant populations and their progenies to the herbicide. Three studies were conduc...

This study aimed to identify the response of wandering jew (Commelina benghalensis L.) plants to different doses of glufosinate ammonium and the sensitivity of plants populations to the herbicide. Two studies were conducted, both in a greenhouse, and were repeated at different times. In the first study, two experiments were conducted to examine the...

Muitas espécies do gênero Digitaria são denominadas de capim-colchão e ocorrem nas principais culturas agrícolas, com destaque para a cana-de-açúcar, a qual utiliza principalmente herbicidas inibidores do fotossistema II para o manejo de plantas daninhas. Devido à complexidade do sistema de cultivo e aos problemas atribuídos à substituição de espéc...

A multiscreening method was experimentally validated for pesticide and antimicrobial residues in spiked eggs at levels of 5, 50, and 500 μ g L ⁻¹ . The residue extraction was performed with acetonitrile and 1% formic acid. The extracted material was stored at −70°C until detection and quantitation within 24-hour period by LC-MS/MS. Pesticide and an...

As all herbicides act on pathways or processes crucial to plants, in an inhibitory or stimulatory way, low rates of any herbicide might be used to modulate plant growth, development, or plant composition. Glyphosate is the most used pesticide in the world, and very low rates of this herbicide can stimulate plant growth, an effect called hormesis. S...

For the successful execution of chemical weed control in sugarcane crop, the selectivity of herbicides is a factor of great importance to maximize crop yield. Each cultivar may respond differently to the same herbicide in the same dose, and selectivity is not only determined by the visual presence or absence of phytotoxicity. Thus, the aim of this...

The objective of this study was to evaluate the response of hairy beggarticks plants to different doses of glufosinate ammonium and the range in sensitivities of the plants and their progenies to the herbicide. Three studies were conducted, all in a greenhouse and repeated at different times. In the first study, two experiments were conducted to ex...

One of the major constraints to sustainable tillage is the rapid decomposition of the dry matter. The mechanism known to facilitate this process is the interference in the metabolic pathways of lignin polymers from spraying herbicide underdoses. This study has aimed to verify the effect of underdoses of haloxyfop-methyl in the synthesis of lignin a...

The aim of this study was to evaluate the absorption and the translocation of glyphosate applied in different positions at eucalyptus plants (Eucalyptus urograndis clone). Two experiments were conducted in a greenhouse on a completely randomized design with four replications. In the first experiment, a 3 × 2 factorial arrangement was adopted, where...

Main conclusion Insertion of the gene encoding phosphinothricin acetyltransferase (PAT) has resulted in cotton plants resistant to the herbicide glufosinate. However, the lower expression and commensurate reduction in PAT activity is a key factor in the low level of injury observed in theWideStrike®cotton and relatively high level of resistance obs...

A utilização de sistemas de manejo de produção com a implantação de culturas sobre a palha proporciona muitos benefícios, incluindo a proteção contra a erosão dos solos, elevação no teor de carbono orgânico, aumento da população microbiana, conservação da umidade do solo e inibição da emergência de algumas plantas daninhas. Considerando essas alter...

Glufosinate ammonium, an inhibitor of the enzyme glutamine synthetase (GS), is one of the most important herbicides for cotton cultivation and it is utilized for weed management in directed spray applications indicated for conventional cultivars. This study aimed to evaluate the absorption velocity of glufosinate ammonium and its effects on weed an...

This study aimed to evaluate the visual injury and concentrations of chlorophyll in two eucalyptus clones submitted to sulfentrazone application, at different doses and in soils with different textures. Experiments were performed utilizing two soil textures (sandy and clayey). The treatments were arranged in a factorial scheme of two (clones) x fou...

The process of mechanical harvesting of sugarcane generates a large deposition of straw on the soil surface, providing a coverage that several studies have found important for reducing the weed population. Although such coverage reduces weed infestations, additional management, including chemical control, is still needed. Thus, this study aimed to...

Many herbicides promote plant growth at doses well below the recommended application rate (hormesis). The objectives of this study were to evaluate glyphosate-induced hormesis in soyabean (Glycine max) and determine whether pre-treating soyabean seedlings with low doses of glyphosate would affect their response to subsequent glyphosate treatments....

O objetivo deste estudo foi avaliar a disponibilidade dos herbicidas clomazone e tebuthiuron na solução de diferentes solos saturados com água ou vinhaça. Amostras de 30 solos com características distintas foram dispostas em bandejas para a pulverização dos herbicidas. Em seguida, foram homogeneizadas, acondicionadas em cartuchos plásticos e satura...

Glyphosate has significant effects on the growth and development of plants when in underdoses. This work was developed to verify the effect of the application of glyphosate in underdoses in lignin synthesis and consequently decomposition of maize stover. Two experiments were conducted; the first one in a greenhouse for underdoses adjustments and th...

There are conflicting reports on the effect of potassium phosphite with or without glyphosate in plants. Some of them indicate that potassium phosphite may cause injuries when applied alone, while others point out that it can reduce the injury caused by glyphosate, when applied in association with this herbicide. This study aimed at evaluating the...

There are conflicting reports on the effect of potassium phosphite with or without glyphosate in plants. Some of them indicate that potassium phosphite may cause injuries when applied alone, while others point out that it can reduce the injury caused by glyphosate, when applied in association with this herbicide. This study aimed at evaluating the...

Through very simple and inexpensive processes, pata-de-vaca leaves were turned into a powder and applied as an adsorbent for the uptake of Cu(II) and Cd(II) from water. The material was characterized through SEM, EDX, FTIR and surface area measurement. The material had its point of zero charge determined (5.24), and its adsorption capacity was eval...

The objective of this study was to evaluate the effects of plant growth regulators and potassium phosphite on hybrid seedlings of Eucalyptus grandis under water stress. The experiment was conducted using a completely randomized experimental design with nine treatments and four replicates in a greenhouse at the Center of Advanced Research in Weed Sc...

The sulfentrazone is regularly applied to sugarcane crop harvest residue for PRE control of weedy species, especially in the dry season during the year, but little is known about how rainfall timing or crop residue mass affect the release of sulfentrazone into the soil and its subsequent effectiveness. Two experiments were conducted to examine the...

This study has aimed to develop a method for simultaneous extraction and determination by liquid chromatography and mass spectrometry (LC-MS/MS) of glyphosate, aminomethylphosphonic acid (AMPA), shikimic acid, quinic acid, phenylalanine, tyrosine and tryptophan. For the joint analysis of these compounds the best conditions of ionization in mass spe...

This study aimed to investigate the tolerance or susceptibility of crabgrass species (Digitaria ciliaris, D. horizontalis and D. nuda) to herbicides that target photosystem II (PSII), by fluorescence technique using the electron transport rate (ETR) through PSII as an indicator. An experiment was conducted under a factorial arrange (3x6), with thre...

Uma das limitações para sustentabilidade do sistema de cultivo em plantio direto é a rápida decomposição da matéria seca. Um dos mecanismos conhecidos para minimizar este processo e potencializar a permanência da palhada no solo é alterar as vias metabólicas dos polímeros de lignina com aplicação de subdoses de herbicida, interferindo diretamente n...

In conservation agriculture, mainly under direct seeding, maintaining the vegetation ground cover is essential, since this serves as a reservoir of nutrients which are slowly released to plants by microorganisms. Some authors have sought to study increases in the amount of straw in the soil, in addition to slowing down the process of decomposition,...

The aim of this study was to determine the environmental concentration of atrazine (ATZ) in five streams located in the north of São Paulo state (Brazil) and evaluate its toxicological impact on young specimens of the pacu fish Piaractus mesopotamicus. Samples of water were collected on three occasions between 2010 and 2011, corresponding to period...

Chlorophyll fluorescence is currently used as a rapid diagnostic and nondestructive method to detect and quantify damage on the photosynthetic apparatus of leaves on weeds, crops and ornamental/coniferous trees in response to both environmental stress and herbicides. This study aimed to evaluate chlorophyll fluorescence in guanandi plants (Calophyl...

Em vista da grande quantidade de agroquímicos aplicados na agricultura, principalmente os herbicidas, cresce a preocupação com a possível contaminação do ambiente com esses produtos, inclusive em corpos dâ€(tm)água. Diante do exposto, o objetivo deste trabalho foi detectar e quantificar herbicidas, por meio de análise multirresíduo, em amostras de...

The aim of this study was to determine the environmental concentration of atrazine (ATZ) in five streams located in the north of Sao Paulo state (Brazil) and evaluate its toxicological impact on young specimens of the pacu fish Piaractus mesopotamicus. Samples of water were collected on three occasions between 2010 and 2011, corresponding to period...

Chlorophyll fluorescence is currently used as a rapid diagnostic and nondestructive method to detect and quantify damage on the photosynthetic apparatus of leaves on weeds, crops and ornamental/coniferous trees in response to both environmental stress and herbicides. This study aimed to evaluate chlorophyll fluorescence in guanandi plants (Calophyl...