August 2015
Effect of nitric oxide on some morphological and physiological parameters in maize exposed to waterlogging stress
Out of 28 genotypes (inbred lines) of maize (Zea mays L.) one waterlogging resistant (HUZM-265) and a susceptible (HUZM-55) were identified on the basis of waterlogging tolerant coefficient (WTC) by imposing waterlogging stress during early growth phase. Selected genotypes were further grown in pots and after 20 days subjected to root zone waterlogging with or without 50, 500 and 2000 µmol L-1 sodium nitroprusside...
August 2015
Germination, vigor, and fungi incidence in melon seeds treated with Thiabendazole
Chemical treatment is known to effectively eradicate or at least reduce the presence of fungi in seeds. However, this treatment should not impair seed quality. The purpose of the present study was to evaluate the physiological and sanitary quality of Cozumel hybrid melon seeds treated with the fungicide Thiabendazole. The experiments were conducted under a completely randomized design, consisting of 15 treatments in a...
August 2015
Performance of American lettuce under different plant covers for no-tillage system
This study aimed to evaluate the agronomic performance of American lettuce "Lucy Brown" in different types of straw from dried cover crops, for a no-tillage system, under the climatic conditions of Campo Grande (Mato Grosso do Sul state, Brazil). The experiment was set up in a randomized block design with five treatments and six replications, totalizing 30 plots. The treatments were: T1 (control) - planting...
August 2015
Fatty acid profiles and parameters of quality of specialty coffees produced in different Brazilian regions
Although fatty acids are known to be important components of coffee flavor and aroma, no study relating such compounds to the quality of coffee has been conducted. Considering the importance of attaining maximum flavor and aroma in specialty coffees, we aimed to investigate the relationship between the fatty acid composition and sensory characteristics of different Bourbon genotypes cultivated under different...
August 2015
Top-dressing nitrogen management decision in potato using the “UFV-80†color chart and SPAD readings
The chlorophyll meter (SPADâ€502) and “UFV-80” color chart can be used to diagnose the nitrogen (N) nutritional status of potato plants to determine the need for fertilizerâ€N topdressing. The present investigation was focused on how chlorophyll meter and “UFV-80” color chart help in determining optimal N management through real time N application for improving yield and profitable rate in...
August 2015
Accelerated ageing test to study the relative storage potential of hybrid sunflower-RSFH-130(Helianthus annuus)
Deterioration of oil seeds is more rapid when compared to the other crop seeds, the deterioration will depend on the chemical composition of the seed and also storage environment. Accelerated ageing (a.a) is one test to study the storage potential of the seeds where the seeds have been exposed to the artificial ageing conditions such as the different relative humidity and temperature. Sunflower hybrid seeds are exposed...
August 2015
A preliminary study of the orange (Citrus sinensis) fruit value-chain in Chimanimani Rural District, Zimbabwe
The study identified the players in the sweet orange value-chain and interviewed them to quantify postharvest losses incurred along the sweet orange value-chain in Rusitu Valley. A sample of 100 farmers in Rusitu Valley was selected using a snow balling sampling technique. A Value-Chain Priority Test was conducted to determine farmers’ priorities between oranges and bananas using a five point hedonic-scale....
August 2015
Bioactivity of trypsin inhibitors from sesame seeds to control Plodia interpunctella larvae (Hübner) (Lepidoptera: Pyralidae)
Biochemical and feeding assays were performed in order to assess the bioactivity of trypsin inhibitors from sesame seeds to control Plodia interpunctella larvae. The biochemical assays were based on the ability of protease inhibitors (PI) present in sesame seeds to inhibit bovine pancreatic trypsin and digestive enzymes of insect larvae. The stability of the inhibitors was also assessed at different pH and temperature....
August 2015
Relationship between sunflower productivity and soil´s chemical properties by geo-statistical techniques
Classical geostatistic techniques and geostatistics are important tools to co-relate linearly and spatially vegetal productivity to the soil´s properties. Spatial and Pearson´s co-relationships between the attributes of the sunflower plant and the soil´s properties were used in Campo Novo do Parecis MT Brazil in 2013 to determine the most significant co-relationship between cause and effect (soil and...
August 2015
Nutrient demand of the carrot crop
The existing literature for the recommendation of fertilizers and diagnosis of the nutritional status of the carrot crop is outdated because it contemplates productivities lower than those currently obtained. The objective of this research was to characterize the nutritional demand of the carrot crop by estimating the dry matter content of the roots, the coefficient of biological utilization of the nutrients and the...
August 2015
Development and longevity of Citrus mealybug Planococcus citri (Risso, 1813) (Insecta: Homoptera: Pseudococcidae) associated with grapevine
The Citrus mealybug Planococcus citri has a wide geographical distribution and has been described as a pest of economic importance in several crops. The present work determined the developmental and biological aspects of the Citrus mealybug in order to obtain information that may support the integrated pest management (IPM) of grapevine (Vitis vinifera L.) cv. Syrah in the Lower Basin of the São Francisco Valley...
August 2015
Initial assessment and nutritional status of hybrid eucalyptus sp. in the municipality of Colorado Do Oeste, Rondônia State - Brazil
The objective of this research was to determine the initial growth, nutrition and soil fertility of Eucalyptus plantation in Rondônia State, Brazil. The treatments consisted of four hybrids (VM1, H13, GG100 and I144) and four replications, each plot contained 30 plants, totaling 480 plants. The VM1 clone was obtained from the hybrid of Eucalyptus urophylla x Eucalyptus camaldulensis, and the others, from the...
August 2015
The influence of financial crisis on inefficiency and nonlinearity on Brazilian soybean prices
We investigated the effect of the 2007 to 2008 Brazilian financial crisis on nonlinearity and the prediction accuracy of artificial neural networks on monthly soybean prices in Brazil. To determine the exogenous variable, the commodity’s logarithm return was calculated. The best period for the series simulation was then identified, simulations carried out and the model validated. Model forecasting results were...
August 2015
Effects of water management on growth, irrigation efficiency and initial development of Aspidosperma polyneuron seedlings
The amount of available water for nursery irrigation is forecasted to decline on this decade and over or deficit watering of seedlings may have adverse consequences. To produce quality seedlings for accelerate the restoration of ecosystems and prevent further environmental damage, nursery water management should be reformed, especially for endangered species, such as Aspidosperma polyneuron Müll. Arg. The objective...
August 2015
Olive (Olea europaea L.) seed germination as affected by different scarification treatments
In Olive (Olea europaea L.) a critical balance of concentration and time was necessary to achieve high germination percentages without loss of viability of the seeds. Therefore olive cvs. Coratina and Pendolino seeds were subjected to chemical treatment with HCl, GA3, NaOH and water for two dips time (12 and 24 h) to determine the most appropriate treatment to improve seed germination and to reduce seed germination...
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