
Matheus De Freitas SouzaUniversidade de Rio Verde · Department of Agronomy
Matheus De Freitas Souza
Doctor of Crop Production
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108
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Introduction
Additional affiliations
August 2015 - February 2017
August 2014 - present
August 2011 - July 2013
Education
August 2014 - July 2016
January 2009 - January 2014
Publications
Publications (108)
The cultivation of conventional maize in refuge areas is important for preserving Bt technology and serving specific markets with greater added value to the grains. Therefore, research aimed at chemical weed control must also continue to be directed to conventional maize hybrids. The objective was to evaluate the selectivity of herbicides applied i...
The presence of weeds at the beginning of cultivation can negatively affect cassava productivity because of the slow initial development of the crop. To minimize weed interference, pre-emergence herbicides can be used, provided they are selective to crops. In this study, we evaluated the selectivity and efficacy of herbicides applied in pre-emergen...
The use of herbicides has been carried out without considering the physical and chemical properties of the soil and its variation in the different producing regions. Its interaction is dependent on the properties of the soil and the herbicide itself and, therefore, is considered complex. An alternative to optimize the use of herbicides is the appli...
The sorption coefficients of herbicides are directly linked to soil properties, making predictive mathematical modeling crucial for understanding their behavior in soil environments. This study aims to leverage artificial neural networks (ANNs) to predict the sorption coefficient of S-metolachlor in soils, facilitating the assessment of environment...
Chemical desiccation in the preharvest of grains and seeds is commonly used in production fields. Using herbicides for this purpose is a viable alternative to reduce beans’ exposure to adverse crop conditions. Our objectives were to evaluate (1) the efficacy of herbicides for accelerated defoliation of cowpea, (2) the impact of herbicide applicatio...
Atrazine is an herbicide with a high soil leaching capacity, contaminating subsurface water sources. Once the water table is contaminated, riparian species can be exposed to atrazine. In this way, understanding the impacts of this exposure must be evaluated for planning strategies that minimize the effects of this herbicide on native forest species...
Mobile herbicides have a high potential for groundwater contamination. An alternative to decrease the mobility of herbicides is to apply materials with high sorbent capacity to the soil, such as biochars. The objective of this research was to evaluate the effect of eucalyptus, rice hull, and native bamboo biochar amendments on sorption and desorpti...
The leaching of herbicides into the soil is essential to control germinating seeds and
parts of vegetative weeds. However, herbicide transportation to deeper soil layers can result in groundwater contamination and, consequently, environmental issues. In this research, our objective was to investigate differences in herbicide leaching between commer...
An alternative to the conventional variance analysis to extract more adequate answers involving the relationship of morphological and phenological variables with grain yield is using multivariate statistical analysis. The objectives of the work were: (i) to group soybean cultivars, planted in two planting seasons, based on their similarity for morp...
Compacted soils may be negatively affecting the selectivity of herbicides applied in preemergence in the soybean crop. Therefore, the present work aimed to investigate possible negative effects on the morphophysiological characters of soybean plants, as well as on the agronomic and yield performances of this crop. For this purpose, two trials were...
The objective of this work was to evaluate the application efficiency of different nozzle tips associated with increasing application rates. A field experiment was conducted in a factorial 3 × 4 randomized block design with four replicates. The first factor consisted of three types of nozzle tips (simple flat fan, hollow cone, and hollow cone with...
The no-tillage system is a conservation system that helps sustainability and agricultural production. The effectiveness of glyphosate control, applied alone or in combination with other herbicides, can be altered depending on the product’s formulation. The objective of the present study was to evaluate the effectiveness of glyphosate in formulation...
Tem sido comum a presença de plantas voluntárias de soja em lavouras de crotalária (Crotalaria spectabilis) cultivada em segunda safra, necessitando assim a adoção de estratégias para o seu manejo. Este trabalho teve como objetivo avaliar a eficácia e a seletividade dos herbicidas pyrithiobac-sodium e ethoxysulfuron aplicados isoladamente em pós-em...
One factor limiting the achievement of high yields in the soybean crop is weed interference. The level of weed interference can vary according to the specificities of the weed community but also due to the agronomic characteristics of the soybean varieties. The objective of this work was to evaluate the effects of weed interference on soybean varie...
The genetic improvement of soybean cultivars over the years has focused on increasing the yield capacity and tolerance to some abiotic and biotic factors, such as drought, diseases, and pests. However, during the transfer of genes of interest, some genes responsible for a lower tolerance to herbicides can be integrated into the genome of the new cu...
Herbicides have already reported environmental contamination in several countries with intense agricultural activity. The transport of these molecules due to leaching and surface runoff has frequently caused contamination of rivers, groundwater and soil in non-agricultural areas. Thereby, we propose to investigate the sensitivity and phytoremediati...
In no-tillage systems, soil compaction has caused negative impacts on crop productivity and soil quality. The objective of this study was to evaluate the soil physical quality after different crops of the second season: maize, sorghum, and millet in compacted and uncompacted soils, in addition to evaluating the performance of soybean in succession...
Despite the great benefits arising from the adoption of Roundup Ready® (RR®) soybean, there are reports about the lack of selectivity of glyphosate for this crop. The use of growth-promoting microorganisms can help attenuate the injuries caused by herbicides. The objective of this work was to evaluate the agronomic performance of RR® soybean submit...
The large variation in the response of sunflower to nitrogen fertilization indicates the
need for studies to better adjust the optimum levels of this nutrient for production conditions. Our objectives were to analyze the agronomic yield of sunflower cultivars as a function of nitrogen fertilization; indicate the cultivar with high nitrogen use effi...
Sunflower is an oleaginous plant of great importance worldwide that stands out in the production of edible oil and human food. The identification of differences between cultivars regarding the use of phosphorus and the production of achenes at different levels of phosphate fertilization is a viable strategy to allow its cultivation in soils with di...
The management of weeds in melon is hindered by the slow initial growth of the crop, favouring weed infestation and reducing production. During the years 2016 and 2017, weed interference periods were evaluated in two melon hybrids, yellow and frog skin, to determine the time of weed control in the crop. Four-parameter logistic regression was used t...
The objective of this work was to evaluate the effectiveness and selectivity of herbicides applied at preemergence to the melon (Cucumis melo) crop. The experiments were carried out from 2017 to 2018, in a randomized complete block design, with four replicates, in the state of Rio Grande do Norte, Brazil. The treatments consisted of the preemergenc...
Knowledge about herbicide-soil interactions is essential for the safe use of these products. The objective of this study was to evaluate the potential of multivariate discriminant analysis to predict the picloram sorption and desorption capacity of soils and to determine soil groups based on the risk of environmental contamination. Physicochemical...
Herbicide mixtures have often been used to control weeds in crops worldwide, but the behavior of these mixtures in the environment is still poorly understood. Laboratory and greenhouse tests have been conducted to study the interaction of the herbicides diuron, hexazinone, and sulfometuron-methyl which have been applied alone and in binary and tern...
The behavior of herbicides as organic and inorganic colloids in soils depends on the pHysicochemical characteristics of the compounds, soil properties, and climatic conditions. Studies involving sorption, desorption, leaching, and dissipation of herbicides are essential to evaluate weed control efficiency and knowledge of the potential for environm...
BACKGROUND
Weed control can be economically viable if implemented at the necessary time to minimize interference. Empirical mathematical models have been used to determine when to start the weed control in many crops. Furthermore, empirical models have a low generalization capacity to understand different scenarios. However, computational developme...
Weed management is essential in vegetable crops, constituting the main production cost. Cultural control strategies can help minimize weed interference and decrease the critical period for weed control (CPWC) when well implemented. Localized nutrient and water supply may favor crop growth, suppressing weeds, and reducing the CPWC. We hypothesized t...
Glyphosate is applied for dissection in no-till and post-emergence management in transgenic crops in agricultural fields near the Cerrado and Caatinga biomes. These biomes together represent 33.8% of the Brazilian territory, contributing to the maintenance of great world diversity in flora and fauna. Despite actions to protect them, the proximity w...
Stress caused by soil water deficit has been one of the main factors that inhibit plant growth. The knowledge of the factors related to the behavior of weed species under water stress conditions can contribute to the elaboration of effective control strategies. Two experiments were carried out to evaluate the effects of the degree and duration of w...
Weed control is a necessary practice to avoid crop yield losses. Therefore, farmers should answer the following question: when to start weed control? Currently, there are no learning models to assist the producer to answer this question. Thus, the objectives were to: 1) evaluate the ability of artificial neural networks (ANNs) to estimate the begin...
The speed of the sorption reaction alters the bioavailability of herbicides in the soil and, consequently, the transport and transformation processes of the molecule in the environment. In this research, the sorption kinetics of sulfometuron-methyl was evaluated in different Brazilian soils in which sugarcane is grown. The sorption speed was carrie...
Weed interference is one of the factors that reduces carrot yield considerably. The aim of this study was to determine the periods of weed interference in carrots cultivated under two localized irrigation systems. The experiment used a completely randomized block design, with three replications, using the split plot scheme. The plots consisted of t...
The environmental fate of herbicides in soils depends on the interactions between them. Pinpointing groups of soils with a high and low potential risk of leaching can provide a better herbicide use. The objectives were: i) Identify the physical–chemical attributes that contribute to greater variance between soils through principal component analysi...
Biochar is a material with the ability to adsorb pollutants, and this capacity depends on pyrolysis temperature. In this research, the effect of pyrolysis temperature (650, 750, 850, and 950 °C) on the properties of biochar derived from eucalyptus wood and its influence on the sorption/desorption,
leaching, and distribution of hexazinone in soil we...
Pyrolysis conditions directly influence biochar properties and, consequently, influence the potential use of biochar. In this study, we evaluated the effects of different pyrolysis temperatures (450, 550, 650, 750, 850, and 950 °C) on the hydrogen potential, electrical conductivity, ash content, yield, volatile matter content, elemental analysis, F...
The selection of weed biotypes that are resistant to glyphosate has increased the demand for its use mixed with other herbicides, such as sulfentrazone. However, when chemical molecules are mixed, interactions may occur, modifying the behavior of these molecules in the environment, such as sorption and desorption in soil. In this study, we hypothes...
Carotenoid quantification in food can be performed by various techniques, such as spectrophotometry, mass spectrometry, high performance liquid chromatography, gas chromatography, and colorimetry. The objective of this study was to verify the feasibility
of indirect selection for assessment of total carotenoids in pumpkin accessions. The experiment...
Weed control in the sesame crop (Sesamum indicum L.) is a fundamental practice that ensures high grain yield. Choosing adequate control methods is a crucial step to reduce costs and reach success in weed management. Among these methods, application
of chemicals shows high efficiency and low cost for farmers. However, the use of this method in sesam...
Several groups of microorganisms degrade and use herbicide residues as a source of carbon and nitrogen. Identification of new strains capable of tolerating and degrading these pesticides can make strategic planning more flexible in environmental decontamination programs. Our objective was to evaluate the tolerance and growth in vitro of Bradyrhizob...
The use of herbicide mixtures has been a common practice in the control of weeds in sugarcane crops. The concern with the interactions between the molecules of different herbicides has been limited to compatibility before application. In this sense, little is known about the interactions between mixed herbicides and the soil. The objectives of this...
In Brazil, the atrazine has been applied frequently to join with glyphosate to control resistant biotypes and weed tolerant species to glyphosate. However, there are no studies about atrazine's behavior in soil when applied in admixture with glyphosate. Knowledge of atrazine's sorption and desorption mixed with glyphosate is necessary because the l...
Macrophomina pseudophaseolina has recently been reported in association with weeds in melon producing areas in Northeastern Brazil. Species from this genus are the causal agents of root rot and vine decline (RRVD) in melon, reducing its productivity. It is needed to know the genetic variability of the pathogen to develop effective control methods....
The importance of intensive agricultural activity in providing food for man is evident. However, criticism about the negative impacts of this practice on the environment has raised a discussion about the sustainability of these food production systems. Among these impacts, the contamination of water resources has been recurrent in areas near agricu...
Agricultural practices act as an ecological filter of weeds, selecting those more adapted to the agrosystem. The stress conditions due to cultivation preparations shape the weed community, influencing the productive performance of the crops. Among these practices, irrigation can directly affect the establishment of some weeds, and a better-adapted...
Water deficits can alter vital physiological functions and negatively affect plant growth. These effects can be intensified by weeds competing for water available to crops. The objective of this study was to evaluate the effects of competition and temporary soil water deficit on the transpiration (E), stomatal conductance (gs) and photosynthetic ra...
Increasing the pH of soils by applying limestone alters the sorption of herbicides and their efficiency at controlling weeds. The objectives of this study were to investigate the effects of increasing the pH and adding Ca2+ and Mg2+ on the sorption and desorption of diuron in different soils, and to evaluate the behavior of the herbicide in cationi...
The herbicides diuron, hexazinone, and sulfometuron-methyl present a potential risk of environmental contamination and are widely used for weed control in sugarcane cultivation. Our objectives were to measure the tolerance of Canavalia ensiformes (L.) DC., Stilizobium aterrimum L., Raphanus sativus L., Crotalaria spectabilis Röth, Lupinus albus L.,...
Bidens subalternans DC. is a weed found in several tropical countries such as Brazil. Large number of produced seeds and easy dispersion favor the colonization of agricultural fields by this species. To know the factors that affect the germination of B. subalternans can help to understand its ecology, permitting to develop control strategies. Labor...
A field experiment was performed to determine the effects of tembotrione and atrazine residues in soil on sugar beet eight months after herbicide application. The treatments included sugar beet cultivation with tembotrione-contaminated soil (50.4 g a.i. ha-1), tembotrione (100.8 g a.i. ha-1), tembotrione and atrazine (50.4 g a.i. ha-1 + 2 L a.i. ha...
Weed control efficiency and the environmental contamination potential of herbicides depend on soil sorption and desorption. Among the indexes that evaluate the soil adsorption processes, the coefficients sorption (Kfs) and desorption (Kfd) obtained by Freundlich isotherms can provide accurate information about the behavior of an herbicide in the so...
The ability of a plant species to succeed in colonization of agroecosystem depends on its efficiency in the use of growth resources even in deficient conditions. The present study aimed to evaluate the effects of competition and water deficit in the soil on the accumulation of macronutrients of Vigna unguiculata L. Walp., Commelina benghalensis L....
Knowledge of factors related to the dynamics of herbicides in the environment is of fundamental importance to predicting the behavior of herbicides in soils with different attributes, to select appropriate dosages, as well as to avoid harmful effects on the environment and subsequent crops. The objective of this work was to evaluate the sorption an...
Crops tolerant to salt and drought stress are an excellent alternative for producers in semi-arid regions. However, it is necessary to select the crops more tolerant and understand their involved mechanisms. We evaluated the effects of salinity and drought on growth, water status, membrane integrity, as well the behavior of organic and inorganic so...
Cowpea (Vigna unguiculata (L.) Walp.) is an edible legume with good ability to fix nitrogen and not demanding soil fertility. However, some genotypes may have a greater ability to utilize the nutrients available in the soil for their growth. Thus, the objective of this work was to evaluate the efficiency of phosphorus (P) use in genotypes of cowpea...
The sesame crop (Sesamum indicum L.) is sensitive to competition with weeds because of its low competitiveness that is directly linked to its slow initial growth. The control of weeds in the crop is an essential practice to ensure the high productivity of this oilseed. Therefore, to define the critical period of interference prevention is important...
Sweet sorghum is currently an important alternative for ethanol production in sugar cane off-season. In this study was to evaluate the effects of plant arrangements and the application of atrazine and S-metolachlor on growth and productivity of sweet sorghum. An experiment was conducted in randomized block design and, arranged in split plots with f...