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Rondonópolis, Brazil

Vilarinho M.K.C.,Mato Grosso State University | da Silva T.J.A.,Federal University of Mato Grosso | Caneppele C.,Medicina Veterinaria UFMT | Rozado A.F.,ICAT UFMT
Bioscience Journal | Year: 2016

Sitophilus species are major pests of stored grain and their control is achieved mainly with the use of chemical insecticides, but the indiscriminate use of these products is resulting in several undesirable factors to man and to the environment. Thus, the use of natural insecticides comes as an option to control the insects, while lessening risks to the environment. The study was conducted at the Institute of Agricultural Sciences and Technologies, Rondonópolis campus of the Federal University of Mato Grosso, in the period from March to September 2012. The experiment was conducted under three different storing conditions. Aqueous extracts were obtained by the addition of Allium sativum L, Azadirachta indica A. Juss. and Cymbopogon winterianum Jowitt vegetable powders in distilled water, at a ratio of 5 g per 100 ml, and the levels of chemical insecticides were of 0.04 and 0.15 ml/100 ml of water for deltamethrin and chlorpyrifos, respectively. Treatments were added to the corn grains, which were placed in a 2.5 L glass container, mixed by manual shaking and infested with 20 adults of unsexed Sitophilus zeamais. Grains were stored for 60 days. At 30 and 60 days, the following items were analyzed: bugs count, water content in grains and electrical conductivity. The data were submitted to analysis of variance, and means were compared by Tukey test at 5% probability. At 30 days, the efficiency of chemical insecticides in the control of Sitophilus zeamais was observed in the three storage environments. Vegetal extracts were not effective in controlling insects. The larger number of insects increased the electrical conductivity and humidity values in the grains. © 2016, Universidade Federal de Uberlandia. All rights reserved. Source


Barbosa E.A.A.,University of Campinas | Arruda F.B.,IAC APTA SAA | Pires R.C.M.,IAC APTA SAA | da Silva T.J.A.,ICAT UFMT | Sakai E.,IAC APTA SAA
Revista Brasileira de Engenharia Agricola e Ambiental | Year: 2013

The objective of this study was evaluate the effect of irrigation and fertigation with mineral fertilizer and vinasse applied by subsurface drip irrigation, in the number of tiller, stem yield, technological quality of sugarcane and yield of recoverable sugar in first three cycles of ratoon cane. The treatments were: T1NI - cultivation without irrigation with mineral fertilization; T2I - cultivation fertigated with mineral fertilizers; T3Iv - cultivation fertigated with the vinasse supplying K and complementation of NP with mineral fertilizer; T4IV - cultivation fertigated with the vinasse supplying NPK. In the cycle of the first ratoon cane, there was no effect of treatments on the variables, already in the subsequent cycles, the T2I and T3Iv showed higher numbers of tillers, 17.4 and 17.2 tiller m-1, in the second ratoon cane and 16.6 and 16.0 tiller m-1 in the third ratoon cane, respectively. The stem yield was amended with the T4IV obtaining the higher yield, 179.6 Mg ha-1, in the second ratoon cane, and the T2I and T3Iv in the third ratoon cane, 151.5 and 151.0 Mg ha-1, respectively. There was no treatment effect on the technological quality and in the second ratoon cane the T3Iv and T4IV showed higher yield of sugar, 25 and 25.9 Mg ha-1, respectively. Source


Cabral C.E.A.,FAMEV UFMT | Bonfim-Silva E.M.,ICAT UFMT | Bonelli E.A.,FAMEV UFMT | da Silva T.J.A.,ICAT UFMT | And 2 more authors.
Revista Brasileira de Engenharia Agricola e Ambiental | Year: 2012

The primary macronutrients have an important role in the forage fertilization, depending on their contribution to the production cost. This paper aimed to evaluate the effects of soil compaction on the concentration of primary macronutrients present in diagnostic leaves of Piatã and Mombaça grasses. The experiment was conducted in a greenhouse with a randomized statistical design, consisting of eight treatments and three replications in 2 × 4, factorial scheme, with two grases (Piatã grass and Mombaça) and four soil densities (1.0, 1.2, 1.4 and 1.6 Mg m-3). Two harvest of shoots were made, the first 42 days after the plant thinning, and the second 46 days after the first cutting. In the first growing period, the soil compaction interfere with the absorption of nitrogen and phosphorus, while in the second growing period there is a limitation in the absorption of nitrogen and potassium. Nitrogen is the primary macronutrient most limited by soil compaction. Source


Barbosa E.A.A.,University of Campinas | Arruda F.B.,IAC APTA SAA | Pires R.C.M.,IAC APTA SAA | da Silva T.J.A.,ICAT UFMT | Sakai E.,IAC APTA SAA
Revista Brasileira de Engenharia Agricola e Ambiental | Year: 2012

This study aimed to evaluate the effect of subsurface drip irrigation and the application of stillage and nutrients in some agronomic parameters, stem yield, technological characteristics of sugarcane and yield of theoretical recoverable sugar. The experiment was carried out in completely randomized block design with four treatments and five replications. The treatments were: mineral fertilizers without irrigation; irrigation and fertigation with NPK using mineral fertilizers; irrigation and fertigation with stillage supplying the K and complementation of N and P with mineral fertilizers; and irrigation and fertigation with stillage supplying the NK and complementation of P with mineral fertilizer. The system of irrigation adopted was the subsurface drip irrigation. The irrigated treatments showed higher number of tillers and leaf área index, when compared to rainfed cultivation. The fertigation with stillage supplying the K promoted higher Brix and stem yield when compared to non-irrigated cultivation. The irrigation and fertigation with stillage supplying the NK promoted higher yield of theoretical recoverable sugar, when compared the cultivation without irrigation. Source


Bonelli E.A.,Mestrando FAMEV UFMT | Bonfim-Silva E.M.,ICAT UFMT | Cabral C.E.A.,Mestrando FAMEV UFMT | Campos J.J.,Mestrando FAMEV UFMT | Polizel A.C.,ICAT UFMT
Revista Brasileira de Engenharia Agricola e Ambiental | Year: 2011

The grasses of the genera Brachiaria and Panicum have significant participation in the grasslands of the Cerrado region, but few studies relate their behavior in conditions of soil compaction. The objective was to evaluate the development of grasses Brachiaria brizantha v. Piatã and Panicum maximum v. Mombaça in increasing levels of soil compaction. The experiment was carried out in a greenhouse at Federal University of Mato Grosso. The experimental design was completely randomized with 8 treatments and 3 replications, arranged in a factorial design involving two grasses and four compaction levels, 1.0, 1.2,1.4 and 1.6 Mg m -3. Two cultings were made and the evaluated variables were: number of tillers NT), drymatter of leaf blade (DMLB), dry matter of stem (DMS), drymatter of root (DMR), leaf/stem ratio (DMLB/DMS); dry matter of shoot (DMSH) and the DMSH/DMR ratio. The levels of soil compaction did not influence the production of grass Piatã in two growth periods.The Mombaça grass showed a reduction in production due to soil compaction in the second growth cycle. Source

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