Instituto Federal Goiano IFGoiano

Morrinhos, Brazil

Instituto Federal Goiano IFGoiano

Morrinhos, Brazil
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Vital R.G.,Instituto Federal Goiano IFGoiano | Jakelaitis A.,Instituto Federal Goiano IFGoiano | Costa A.C.,Instituto Federal Goiano IFGoiano | Silva F.B.,Instituto Federal Goiano IFGoiano | Batista P.F.,Instituto Federal Goiano IFGoiano
Planta Daninha | Year: 2017

Chemical ripeners are frequently used on sugarcane crops in order to increase profitability. However, the drift of these products to neighbouring fields can expose susceptible non-target plants, such as sunflower, to these agents causing indirect impacts on growth and development. Therefore, this study aimed to assess the toxicity characterize possible changes in the growth of sunflower plants exposed to simulated drift of the ripeners glyphosate and trinexapac-ethyl. For each ripener, the following doses were used: glyphosate (0 (control), 3.6, 7.2, 14.4, 28.8 and 86.4 g a.e ha-1) and trinexapac-ethyl (0, 3.12, 6.25, 12.50, 25 and 75 g a.i ha-1). The effects of these products on plant height, number of leaves, leaf area, stem diameter and dry matter (leaves, stem, flower, root, shoot and total) were evaluated. We also conducted a visual analysis of symptoms of phytotoxicity after exposure. The effects of the ripeners on sunflower plants varied depending on the type of agent used and the dose. Plants treated with glyphosate showed altered growth patterns, indicating high sensitivity of these plants to the herbicide. With increasing doses, glyphosate drift promoted lower growth and development of sunflower plants and negatively affected productivity. Nevertheless, trinexapac-ethyl drift, in the evaluated doses, did not affect sunflower plants. © 2017 Sociedade Brasileira da Ciencia das Plantas Daninha. All rights reserved.

Pontes N.C.,Instituto Federal Goiano IFGoiano | Fujinawa M.F.,Instituto Federal Goiano IFGoiano | Oliveira J.R.,Federal University of Viçosa
Horticultura Brasileira | Year: 2017

The efficacy of five selective media described in the literature for the detection of Ralstonia solanacearum in soil was evaluated using isolates from different regions of Brazil. The selective media were evaluated regarding their sensitivity, target-pathogen repression index, capacity for suppressing contaminating microorganisms and recovery rate of the pathogen in soil. No bacterial growth was observed at the concentrations tested for FSM and SM-1 media. Some isolates grew on the PCCG medium with the addition of antimicrobial agents, but only at concentrations of 106 cfu/mL. For the SM and SMSA-E media, adequate sensitivity for the detection of R. solanacearum in soil was observed, enabling detection at a concentration of approximately 103 cfu/gram of soil. SMSA-E (Selective Medium South Africa -Elphinstone) was found to be the most effective in suppressing the growth of contaminating microorganisms, resulting in the lowest rate of repression of R. solanacearum and the highest recovery rate of the bacterium in the soil. © 2017, Sociedade de Olericultura do Brasil. All rights reserved.

de Liborio C.B.,Instituto Federal Goiano IFGoiano | Verzignassi J.R.,Embrapa Gado de Corte | Fernandes C.D.,Embrapa Gado de Corte | do Valle C.B.,Embrapa Gado de Corte | And 2 more authors.
Ciencia Rural | Year: 2017

In this study, the aim was to determine the influence of potassium nitrate, using different concentrations and immersion times on the dormancy of the seeds of Brachiaria humidicola cv. ‘BRS Tupi’. Four experiments were performed adopting a factorial scheme (5x3+1) in different seed lots, for different post-harvest storage durations, during which the seeds were immersed in potassium nitrate solutions of different specific concentrations (0, 0.1, 0.3, 0.5 and 1% KNO3), for three exposure periods (12, 24 and 48h), plus one control (untreated), in a completely randomized design. The characteristics assessed included the imbibition curve, germination, first count and germination rate, as well as viability confirmed by using tetrazolium test. From the findings it was evident that treatments involving 0.1; 0.3; 0.5 and 1% KNO3 or pure water, with a 12 hour-soaking period enabled the stored seeds to germinate well for a minimum of eight months post harvest. Root protrusion was observed 24 hours post seed imbibition, whereas for the untreated seeds, satisfactory germination was observed from at least 12 months post harvest and, in most of the lots, between 18 and 24 months. © 2017, Universidade Federal de Santa Maria. All rights reserved.

Barreto Cunha J.P.,Federal University of Lavras | De Almeida Machado T.,Instituto Federal Goiano IFGoiano | Lucio Santos F.,Federal University of Viçosa | Moraes Coelho L.,Federal University of Goais
Pesquisa Agropecuaria Tropical | Year: 2014

Losses in the mechanical harvesting of industrial tomatoes, depending on the levels reached, may considerably reduce the yield of the planted areas. This study aimed to evaluate the effect of settings of the rotary separation system on losses observed during the mechanized harvesting process. The statistical design was completely randomized, in a factorial scheme with four replications, where each plot consisted of the combination of three rotation levels (6 rpm, 24 rpm and 18 rpm) with three vibration frequencies (0.83 Hz, 2.50 Hz and 4.17 Hz) from the separation system. The recorded losses were divided into branch losses, fruit losses on the soil and total losses. Sequential and control charts for individual values and variable ranges composed by the upper and lower limits of control and average were used as a tool of statistical process control. The results showed that the total losses incurred are outside the control limits and acceptable standards for industrial tomato crops. The use of higher levels of rotation and vibration in the harvester separation system provided a higher harvest efficiency. © 2014, Universidade Federal De Goias (UFG). All rights reserved.

Rodrigues de Souza J.A.,Instituto Federal Goiano IFGoiano | Moreira D.A.,Instituto Federal Goiano IFGoiano | Moreira Conde N.,University Estadual Of Minas Gerais Uemg | Belchior de Carvalho W.,Instituto Federal Goiano IFGoiano | Miranda e Carvalho C.V.,Instituto Federal Goiano IFGoiano
Revista Ambiente e Agua | Year: 2015

In this work we investigated the interference of anthropic activities on the potability of groundwater in the urban area of the city of Ubá, MG. To accomplish this, the physical characteristics (temperature, turbidity and color), chemical (pH, conductivity, chloride, nitrate and hardness) and microbiological (total and thermotolerant coliforms) of ten upwelling waters were monitored throughout one year. The temperature, pH, color, chloride and hardness of all upwelling waters were considered normal compared to standards of potable water. However, the analyses of turbidity, electrical conductivity, nitrate and total and thermotolerant coliforms indicate contamination by human activities. Overall, the results indicated the occurrence of high environmental degradation, where only 30% of monitored upwelling waters were in accordance with the quality standard, indicating the need for intervention to ensure water quality. © Rev. Ambient

Brasil T.A.,Instituto Federal Goiano IFGoiano | Capitani C.D.,University of Campinas | Takeuchi K.P.,Federal University of Mato Grosso | Ferreira T.A.P.C.,Federal University of Goais
Food Science and Technology | Year: 2015

Pearl millet flour was utilized in kibbeh formulations instead of whole-wheat flour. Physicochemical properties, oxidation stability and sensorial characteristics of control kibbeh made with whole-wheat flour (CT) were compared with kibbehs prepared with millet flour (roasted or wet) and stored for 90 days (–18 °C). Kibbeh prepared with millet flour presented good oxidation stability (TBARS concentration). Baked kibbehs (with roasted millet flour) presented good acceptability and kibbeh samples did not differ significantly (p > 0.05) from the whole-wheat flour sample, when global appearance, texture and flavor were evaluated. Millet flour could be a suitable ingredient for kibbeh formulations, maintaining their nutritional value and sensorial quality in addition to being a gluten-free product. © 2015, Sociedade Brasileira de Ciencia e Tecnologia de Alimentos, SBCTA. All rights reserved.

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