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Pelotas, Brazil

Bettoni J.C.,Bolsista CAPES | Pereira Gardin J.P.,Experimental de Videira | Feldberg N.P.,Embrapa Produtos e Mercado | Costa M.D.,Pesquisador da Estacao Experimental de Lages | Schumacher R.,University of Castilla - La Mancha
Revista Brasileira de Fruticultura | Year: 2015

The aim of this study was to evaluate the concentrations of indole-3-butyric acid (IBA) in hardwood cuttings of promising grapevine rootstocks for southern Brazil. Plant material was collected from selected plants from the grapevine rootstock collection of EPAGRI Experimental Station, in the city of Videira - SC. The experiment was conducted in a greenhouse during the period from July to October 2013. The experimental design was completely randomized with 20 treatments arranged in a 4x5 factorial scheme, consisting of four rootstocks (VR043-43, Dogridge, Richter 99 and EEV793-5) and five IBA concentrations (0 , 1.000 , 2.000, 3.000 and 4.000 mg L L-1). After 60 days, it was evaluated the rooting percentage, the number, length and the fresh weight of the roots. The use of IBA increased rooting percentage, number, length and fresh weight of roots for all rootstocks. The rootstock VR043-43 showed better root development than the other rootstocks studied. To propagate the four cultivars of grapevine rootstocks evaluated via hardwood cuttings it is recommended the use of IBA at 1000 mg L-1. © 2015, Sociedade Brasileira de Fruticultura. All rights reserved. Source

De Oliveira G.Q.,Federal University of Grande Dourados | Lopes A.S.,State University of Mato Grosso do Sul | Jung L.H.,Bolsista CAPES | Rego N.H.,State University of Mato Grosso do Sul | De Oliveira J.C.L.,Academico do Curso de Engineering Florestal
Engenharia Agricola | Year: 2013

The eucalyptus offers several advantages compared to other forestry species and, by using the irrigation can increase productivity and decrease production time. The objective of the present study was to evaluate two hybrid eucalyptus (Grancam and Urograndis), no irrigation, dripping and micro sprinkler irrigated at 90, 120, 150 and 180 days after transplanting (DAT). The experiment was conducted at the experimental irrigation area in the State University of Mato Grosso do Sul, in the municipality of Aquidauna-State of MS, Brazil. The experimental design was randomized blocks, split plot with four blocks and two replications within each block, and the plots were composed by irrigation treatments (dripping, micro sprinkler irrigate and dry) and the subplots the hybrids (Grancam and Urograndis).The total area of the experiment had 3 hectares, where each plot consisted of 1 ha. It was evaluated plant height, stem diameter and canopy, stem basal area, the relationship between height and stem diameter, the relationship between height and canopy diameter and stem volume. Data were subjected to analysis of variance and compared by Tukey test at 5% probability. Irrigation systems and dripping sprinkle provide greater plant height, stem diameter, canopy diameter, stem basal area and stem volume. Source

The work aimed to evaluate the leaves extract concentration influence Zantedeschia aethiopica on physiological attributes of red rice seeds and seedlings. Treatments were mature leaf extracts at concentrations of 0; 12; 25; 50 and 75%. Were evaluated the germination, first count germination, length of shoot and root, seedling total dry mass, chlorophyll content, electrical conductivity, activity of the enzymes superoxide dismutase, catalase and ascorbarto peroxidase, lipid peroxidation, content of hydrogen peroxide and seedling emergence, length of organs and total dry mass of seedlings emerged. Chlorophyll contents were changed quantitavely and qualitatively, seedling emergence, the root lenght and total dry mass of seedlings was reduced by increasing the concentration of the extract. There was increase in lipid peroxidation, the activity increase of enzymes superoxide dismutase, ascorbate peroxidase and catalase with the concentration of the extract. The results of the work demonstrated that extract of mature leaves of Z. aethiopica alters different physiological attributes and features toxicity of red rice seeds and seedlings. Source

Da Silva A.P.,UEMS | Costa E.,UEMS | Do Espirito Santo T.L.,Brazilian National Council for Scientific and Technological Development | Da Silva L.E.,UEMS | Martins R.F.,Bolsista CAPES
Engenharia Agricola | Year: 2013

The production of high-quality seedlings is a critical factor for successful implementation of a determined crop in the field. In order to evaluate the production of coffee seedlings, experiments were conducted with different substrates and in different protected environments. Treatments consisted of evaluation of the following substrates: 50% cattle manure + 50% commercial substrate, 50% cattle manure + 50% vermiculite, 50% commercial substrate + 50% vermiculite, 1/3 cattle manure + 1/3 commercial substrate + 1/3 vermiculite, 50% cattle manure + 50% sand, 1/3 sand + 1/3 cattle manure + 1/3 commercial substrate and 50% commercial substrate + 50% sand. These substrates were tested in different protected environments: agricultural greenhouse, mesh screen with 50% shading, aluminized screen with 50% shading, black screen with 30% shading, black screen with 70% shading, nursery with a buriti straw roof and full sunlight. In each environment, the experiments were conducted in a completely randomized design with five replicates of fourplants each followed by joint analysis. The substrates containing 50% cattle manure associated with vermiculite or the commercial substrate may be indicated for production of coffee seedlings. Screened environments with 30, 50 and 70% shading resulted in the highest quality seedlings. Source

Dos Santos E.C.M.,Bolsista CAPES | Fernandes C.D.,Bolsista CAPES | Verzignassi J.R.,Bolsista CAPES | Jank L.,Bolsista CAPES | And 2 more authors.
Summa Phytopathologica | Year: 2015

Panicum maximum cultivars have shown great damage due to diseases, such as bell smut and leaf spot, caused by Tilletia ayresii and Bipolaris maydis, respectively. This study aimed to evaluate the reaction of genotypes of such forage grass to those diseases. The experiments were conducted at Embrapa Beef Cattle, in Campo Grande (MS), from February to July 2012. Disease intensities were weekly evaluated for 26 P. maximum genotypes. Among the evaluated genotypes, there were varied degrees of resistance to bell smut and leaf spot. Favorable environmental conditions of temperature and relative humidity were 16ºC to 27ºC and 62% to 88% for bell smut and 22°C to 27°C and 62% to 83% for leaf spot. Resistance to bell smut proved to be a heritable character and genotype PM40 behaved like the susceptible control, cv. Tanzânia-1, in relation to leaf spot. The management of P. maximum plants using standardization cut proved to be promising in the composition of control strategies to reduce leaf spot intensity. © 2015 Universidade Estadual Paulista (UNESP). All rights reserved. Source

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