In the North of Minas Gerais the equineculture is an important activity because it corroborates the success in the breeding of beef cattle. The equine verminosis control in this region has not been applied considering the anthelmintic resistances of nematodes and this resistance has been observed in some equine herds in Brazil. The present study has the objective to evaluate the effectiveness of pyrantel pamoate and ivermectin association in mare verminosis in the North of Minas Gerais, during the peripatum. After fourteen days of the first faecal egg count (FEC) and treatment of the animals with these respective bases, the FEC reduction test indicated 98.1% effectiveness and the coprocultures were negative. After the worm identification from the control group, was observed 30% of filariod worms of Strongyloides spp., 30% of the genus Haemonchus, 20% were worms of Cyathosminae, 10% of the genus Trichostrongylgys and 10% of the genus Oesophagodontus. The results observed suggest that the use of pyrantel pamoate associated with ivermectin was safe during the peripartum and efficient in the FEC reduction of naturally infected mares raised in pastures of the North of Minas Gerais.

This work had as objective to evaluate the growth of three strains of tilapia (Nilotica, Red koina and Chitralada) in semi-intensive culture ponds, in order to define the most adequate strain to commercial scale. Twelve 50 m2 ponds were used in a randomized entirely experimental design with three treatments and four replicates. The culture run 112 days and the ponds were submitted to a preparation that consisted of liming (100 g/m2 of hydrated lime) and chemical fertilization (3 g/m2 of simple superphosphate and 5g/m2 of ammonium sulfate). After verifying good conditions for culture, the ponds were stocked with 75 fingerlings (56.7 + 7.0 g) corresponding to a density of 1.5 fishes/m2. Fishes were fed with 32% crude protein extruded formulated diet in the first 60 days and another with 28% was used for the last 52 culture days, twice a day, at 8:00 a.m. and 4:00 p.m. Feeding rate varied from 4% to 2% of live weight from the beginning to the end of culture. Data analysis demonstrated that there were significant differences among treatments (P<0.05) with Chitralada strain showing the best performance as survival (94.33%), specific growth rate (2.42%/day) and feed conversion ratio (1.14). Thus it was observed that is possible to obtain productivities over 6 ton/ha/cycle using Chitralada strain, being recommended for semi-intensive culture in ponds.

The objective was to study the morphology of the fruits and seeds of marmelinho-do-campo. The botanical characteristics were descripted and the dimensions of the fruits and seeds were obtained. For the description of the embryo, the seeds were kept immersed in distillated water for 24 hours at room temperature. The fruits of this species are indehiscent, globulous and berry-shaped. They have a fleshy mesocarp and contain a large number of seeds. The seeds show an irregular shape, but their majority is angular with triangle-deltoid sides. Their color ranges from yellowgreen to light brown. The embryo is axial, continuous and spatulate. It has short, white, foliaceous and circular cotyledons showing discrete nervures. The seeds have abundant endosperm of rigid consistency.

The techniques of Remote Sensing and Geographical Information Systems (GIS) are of great importance for the study, conservation and management of natural resources, which facilitate to understand the dynamic processes of the nature. The present study was made in the region of Agreste Paraibano which includes the municipalities of Puxinanã and Pocinhos. The Land use and Land cover mapping was done. The satellite Data of Landsat-TM/5, of May 08 of 2002 were used for this study, was made using of the Software Erdas Imagine 8.3.1, for the Maximum Likelihood classification (Supervised Classification). Under this interpretation the total eight classed were identified: Water/Humid Area (9.9Km2), Caatinga Forest 1 (49.5Km2), Caatinga Forest 2 (26.4Km2), Traditional Agriculture Land (69.3Km2), Pasture Land (52.8Km2), Subsistencial Agriculture Land (59.4Km2), Rocky Out Crops/Urban Area (23.1Km2) and Barren Land (39.6Km2), with covers approximately the area of 330Km2. The Accuracy Assesstment was found 100% for Water/Humid Area, 94.80% for Caatinga Forest 1, 93.21% for Caatinga Forest 2, 74.39% for Traditional Agriculture Land, 79.26% for Pasture , 77.67% for Subsistencial Agriculture , 100% for Rocky Out Crop/Urban Area and 75.01% for the Barren Land respectively. The average accuracy assesstment was found of 81,02%, with demonstrated the best accuracy for our classification. It was also found that the Pasture land class need some adequate management practices for the proper use of natural resources. The principal limitations for the classes of the Traditional Agriculture land , Pasture land and Subsistence Agriculture land were found, are: lack of water, surface rockiness and susceptibility of the erosion. The classes of Savanna 1 (Caatinga Forest 1) and Savanna 2 (Caatinga Forest 2), are recommended essentially for the use of preservation fauna and flora, or if possible may be for the sustainable use of the natural resources.

In function of the low availability, due the precipitation and specific adsorption, the phosphorus is very required in fertilization programs. The availability of the phosphorus can be evaluated through chemical extractors, aiming simulate the soil-plant system. The aims of this work are: to determine the available phosphorus in a Quartzarenic Neosol through Mehlich -1, Mehlich -3 and Bray -1 extractors and to observe the relationship between the absorbed and accumulated phosphorus in the melon crop. The experiment was carried out in a greenhouse at Federal Rural University, Pernambuco state, Brazil, in casualizated blocks with three replications and six doses of phosphorus (0, 37, 74, 148, 222 and 370 mg dm-3). The plants were collected at 37 days after seedling, determining the dry mass and the content of phosphorus in the shoot biomass and were collected soil samples to determine available phosphorus with Mehlich - 1, Mehlich - 3 and Bray - 1 extractors. The extractors didn't present differences to the available phosphorus. The increase of soil phosphorus doses increased the phosphorus content in the dry mass, without to cause changes in the production of dry mass.

The sweet potato stands out as one of the most important vegetables for Northeastern cookery, being source of energy and mineral salts. This work was driven with the objective of evaluating the propagation in vitro of you cultivars of sweet potato under different concentrations of BAP (6_Benzilaminopurina). The adopted statistical design was it entirely randomized, in factorial scheme 5 x 5, with 10 repetitions. The first factor consisted of 5 sweet potato cultivars (ESAM 1, ESAM 2, ESAM 3, California and Branca RJ) and the second of 5 concentrations of BAP (0.0; 1.25; 2.50; 3.75 and 5.0 ¿Mol L-1). You cultivate them appraised they answered the concentrations of the growth regulator distinctly. In all of the studied cultivars the presence of calluses was influenced by the concentrations of BAP.

An experiment was carried out, in order to evaluate the saline aspect of the substrate with biofertilizer on seedling formation of yellow passion fruit irrigated with different saline water. A completely randomized design was used, with treatments distributed in a factorial arrangement 5 x 3 x 2, referring to water salinity levels (0.5; 1.0; 2.0; 3.0 and 4,0 dS m-1), substrate volumes (1, 2 and 3 L), in absence and presence of biofertilizer bovine. The following variables were registered at the end of the experiment: pH, electrical conductivity of water and exchangeable sodium percentage. The increase of irrigation water salinity, independently of biofertilizer use, drastically enhanced the substrate salinity, from not saline to saline and strongly saline. No there was definition of the values of PST among substrate volumes. Electrical conductivity values of the saturation extract were higher for substrate with lower volume.

Ecosystem's aquatic metabolism comprises three main levels: production, consumption and decomposition. For the aquaculture fundament the knowledge and accompaniment of the biotic and abiotic factors for a sustainable production. The study evaluated the dynamics of variables limnologics in ponds: Colossoma macropomun (CM) and Pseudoplatystoma corruscans (PC), during a 24hs. The work was accomplished in the Station of Fish farming of Chesf, Paulo Afonso-BA. The variables oxygen (O2), temperature (T°C) and pH were measured every two hours, shines and transparency. Samples of water were analysis ammonia, nitrite, nitrate, inorganic and organic phosphate, total phosphors, chlorophyll a, identification of the plankton and phytobenthos were collected at 09:00, 15:00 and 21:00hs. All the variables physical-chemistries were inside of the ideal for culture species. The group phytoplankton most frequent no CM was Cyanophyta and Bacillariophyta. while in PC was Xanthophyta. The group phytobentic most frequent no CM was Xanthophyta, while in PC was Bacillariophyta. The group of Copepods was the most evident zooplankton in CM and there was absence of Rotifers in PC.

The soil fertility and plant nutrition are influenced by electrochemical reactions occurring on the surface of soil colloids. The point of zero salt effect (PZSE) is an important parameter to study the surface charge of those colloids, since, it allows to determine the net surface charge of soil particles. This paper aimed to determine the PZSE and the net electrical charge of twelve soils from Paraíba State, which samples were collected at the depth of 0-30 cm. The point of zero salt effect was determined using program computational PZSE for Windows version 1.0. The method adopted was the potentiometric titration with different ionic strength using electrolyte NaCl in concentrations 0.1; 0.01 and 0.001 M. The use of the program has a better analysis and accuracy of the values obtained for the PZSE, which ranged from 3.06 to 5.41. All soils had values of PZSE smaller than the pH in water, being, therefore, electronegative. All soils had the potential and the electrical charge negative, possibly due to the effect of organic matter once it presented significant correlation with PZSE.

Corn yield losses caused by weeds may reach up to 80%. Reducing the use of herbicides is one of agriculture's major goals and several alternatives are currently being investigated, including intercropping. In the Brazilian Northeast, corn intercropping with cowpea (Vigna unguiculata (L.) Walp.) is extensively practiced, and there is interest in evaluating weed control under this type of intercropping. The objective of this work was to evaluate the effects of different cowpea planting times, intercropped with corn, on green ear yield of two corn cultivars. The experiment was carried out under randomized design blocks with four replications. AG 1051 and AG 2060 corn cultivars were submitted to the following treatments: no hoeing, two hoeings (20 and 40 days after planting), and cowpea planting (BR 4 - Mulato cultivar, with indeterminate growth) at corn planting and at 5, 10, and 15 days later. Twenty-eight weed species were found in the experiment area. In all characteristics evaluated, except for plant height, ear height, and total number of green ears, where no difference occurred between treatments, the lack of weeding determined the smallest means, while weed control determined the highest. In plots where cowpea was sown, intermediate means were obtained for number and weight of marketable unhusked green ears and for number and weight of marketable husked ears. This suggests that cowpea controlled weeds to a certain extent, especially when it is planted earlier, which was, however, insufficient to avoid green ears yield loss. The corn cultivars evaluated were not different among themselves, except with regard to ear height. The cowpea grain yields were practically null in all plots.