The objectives of this research were to report Meloidogyne mayaguensis on seedlings of guava (Psidium guajava) cv. "Paluma" in commercial nursery in Assu municipality and in commercial field of pipper (Capsicum annum) cv. "Comandante" in Baraúna municipality, in Rio Grande do Norte State and to notify all of segments involved to commercial growing of fruits and vegetables about the risk that seedlings infected by this pathogen represents to the agro-centers of Rio Grande do Norte and Ceará States. Concerning to both reports the identification of pathogenic species was made by the a-esterasic fenotype characterization. The present reports of M. mayaguensis represent the second and the third ones in Rio Grande do Norte State,having been made the first one on plants of guava in Touros municipality. Meloidogyne mayaguensis can represent a threat to commercial growing of fruits and vegetables if eradication and exclusion methods of control will not beused.

The aim of this work is to approach the prevalence of pathological alterations of the genital system of anestrous females of collared peccaries (Tayassu tajacu). The genital systems of 14 matrices proceeding from the Centro de Multiplicação de Animais Silvestres - CEMAS, of the Universidade Federal Rural do Semi-Árido - UFERSA , that were without activity breeding for a period above of one year had been studied. After it abates of the animals had been collected the agencies that compose the genital system and lead to the Laboratory of Animal Pathology of the Institution for pathological alterations evaluation. The joined pathologys had been hydrosalpinges and ovarian hypoplasia with four cases each (28.6%),one (6.7%) case of persistent corpus luteum associate to mucometra and 2 (14.3%) cases of ovarian cysts. The pathologys of the genital system of collares peccaries can, in changeable way, to compromise temporary or the fertility permanently, diminishing the reproductive effectiveness, with consequent reduction of the breeding, generating economic losses .

The objective of this paper was to determine the phosphorus adsorption characteristics using the Langmuir isotherm. The study was carried out in the Laboratório de Irrigação e Salinidade, of Universidade Federal de Campina Grande, PB, Brazil, with surface (0-20 cm) samples from two soils of Paraiba State. The soil samples (2,5 g) were mixed with a CaCl2 0.01M (25 mL), with addition to 0; 35; 45; 55; 70; 85 and 100 mg L-1 of P as KH2PO4 and maintained in contact for 24 hours. The phosphorus was analyzed from the supernatant in order to determine the amount of P adsorbed by the soils. The maximum P adsorption capacity (MPAC) was determined for all soil through the linear model of the Langmuir equation. The Ultisol showed the highest values of the MPAC and PmCF and the Oxisol showed the highest adsorption energy. The results showed that the soil attributes that had influenced on soil MPAC were soil organic matter and clay content and the base saturation.

The sugar sugar cane (Saccharum spp.) has revealed as a new energy alternative, mainly as one of the possible substitutes of oil through the combustible alcohol, and São Paulo State is distinguished as being the producing greater of sugar cane, and thus studies are necessary for estimate your productivity, and for this a model was used to predict potential productivity through IPCC datas scenarios, in this study was used the scenario A2 for Barretos city in São Paulo state in the period of 2000 the 2099. In a general way the changes climatic had caused a beneficial effect for the sugar cane, reflecting in a bigger production of dry mass in stalks.

There is an interest in the knowledge about the fertilizing requirements of melon crops, explored at Pólo Agroindustrial Assú/Mossoró/Baraúnas, Rio Grande do Norte, Brazil, aiming at obtaining high productivity levels for quality fruits, reducing fertilizer wastes, and decreasing environmental degradation. The objective of this work was to evaluate the effects of applications of nitrogen (urea) and potassium doses (potassium chloride) on yield and quality of Gold Mine, yellow melon fruits under drip irrigation. Nitrogen doses (0, 50, 100, and 150 kg N ha-1) were combined in a factorial arrangement with potassium doses (0, 50, 100, and 150 kg K2O ha-1) and applied in a randomized complete block design with five replications. Nitrogen increased the number and total mass of fruits, number of marketable melon fruits, and fruit length/width shape ratio; decreased pulp firmness; but did not change pulp total soluble solids content. These effects were independent from potassium doses, which did not influence the evaluated characteristics.

The obtaining of seedlings of high quality in organic agriculture still represents a challenge, especially with relationship to the concentration of nutrients and the physical properties of the substrate. The objective this research was evaluated effect of cast earthworm as organic component of substrate for production of collard greens-butter seedlings. Two experiments were installed in greenhouse in the Universidade Federal do Acre, both in design completely randomized with eleven treatments and eight replications. The treatments were obtained through of mixtures of different cast earthworm concentrations (0, 10, 20, 30, 40, 50, 60, 70, 80, 90 e 100%) and soil, being dystrophic (V = 29 %) in the experiment I e eutrophic (V = 80 %) in the experiment II. To the 26 days after the sowing was evaluated the height of the plant and dry weight matter masses of shoot, root and total plant. The results of the experiment 1 indicated that addition of cast earthome to soils distrophic increases the growth of the plants, in concentrations greater 70 %. However the results of the experiment 2 indicated that addition of cast earthome in eutrophics soils result in benefits effects for plants only in few quaintly, promoted growth maximum in the concentrations around of 20 %. The results of both experiments indicate that the effect of the cast earthworm as component of substrates was of increasing the growth of collard greens-butter seedlings when the chemical condition of the cast earthworm goes better than the one of the soil in supplying nutritious for the plants.

The total soluble solids content (TSSC) shows high positive correlation with sugars content, and therefore is generally accepted as an important quality trait of fruits. In melon, this evaluation is usually done by grinding a slice of the fruit's pulp in a household food processor, straining the ground material and then proceeding the TSSC determination in the resulting juice. This evaluation is labor-intensive and takes a long time to complete. An alternative process was delineated for obtaining the juice: the pulp of the fruit slice would be transversally cut one or more times, and longitudinally pressed by hand to obtain the juice. The objective of this work was to compare processes for obtaining juice to evaluate TSSC in melons. Fifty, 15, and 15 fruits of the Galia, Yellow, and Cantaloupe type melons were evaluated, respectively. Each fruit was considered as a block, and was longitudinally split into six fractions with similar sizes, which corresponded to the plots. The following treatments were evaluated: fraction without cuts, fractions with one, three, five, or seven transversal cuts, and the fraction treated by the conventional process. It was concluded that the procedure by which the melon slices of Galia, Yellow and Cantaloupe types are pressed for obtaining the juice to evaluate TSSC can overestimate this content. This would probably be due to the fact that the most internal section of the mesocarp presents greater TSSC than the portions closer to the epicarp.

The objective of this work was to evaluate the effect of cut-time on lemon grass essential oil yield and on its constituent citral contents. A completely randomized design with four replications was used. Six cuttimes were studied: 7:00, 9:00 and 11:00 AM, 1:00, 3:00 and 5:00 PM. The analyzed variables were essential oil yield and relative citral contents. The highest essential oil yield was obtained when cut occurred at 7:00 AM. The highest citral contents was obtained when cut occurred at 1:00 PM, but was not statistically different from those obtained at 7:00, 9:00 and 11:00 AM, and 3:00 PM. Lemon-grass must be harvested between 9:00 and 11:00 AM in order to obtain maximum essential oil yield and maximum citral contents.

The present work was realized with the objective to evaluate the percentage of emergenceand the emergence velocity index (EVI) of bacuripari seeds, being accomplished of lath house conditions, with 50% of luminosity, using plants that came from the Germplasm Bank of the Department of Vegetable Production, of Faculdade de Ciências Agrárias e Veterinárias - UNESP - Campus of Jaboticabal, São Paulo state, Brazil. The fruits were picked totally ripe, the seeds were extracted, washed, placed to dry and conditionedin plastic boxes, having vermiculite as substrate. The treatments was characterized by the size of the seeds: very big, big, medium and small, determined by the medium weight of the 50 seeds (in grams), being 63,634; 42,787; 25,631 and 9,508g respectively. The values of the percentage of emergence were transformed in arc sen . The averages were compared by the Test of Tukey, with 5% of probability. Analyzing the results was possible to observe that the smallest values, so of the percentage of the emergence (2,30%) and for the GVI (0,002) were obtained for the seeds with a small size, differing significantly of the other treatments, where was verified values of percentage of emergence of 83,33; 86,25 and 77,00% and GVI values of 0,102; 0,107 and 0,105 for the very big, big and medium, respectively. Can be concluded that there is interference of the seed's size-weight in emergence of this specie.

The residual effect of natural insecticides was evaluated on adults of Sitophilus zeamais Mots. (Coleoptera: Curculionidae) on stored corn grains. Clove (Syzygium aromaticum L.), white pepper (Piper nigrum L.), neem (Azadirachta indica A. Juss) and silica dioxide powders were tested as well as neem, eucalyptus (Eucaliptus globulus Labill and Eucaliptus citriodora Hook.), eugenol, andiroba (Carapa guianensis Aubl.), rosemary (Lippia gracillis HBK.), cedar (Cedrela fissilis Vell.) and pequi (Caryocar brasiliense Camb.) oils. Powders were tested at concentration of 1kg/t in 50g-corn-plot and the oils at dosage of 50¿L in 20g-corn-plot. The plots infestation was accomplished using 20 and 8 adults (males and females) of S. zeamais being 0 to 15 days old, respectively, in the experiments with powders and oils. Silica dioxide caused 46.7, 38.3 and 37.5% of mortality, respectively, in the initial (soon after the treatment with the powders or oils) and at 60 and 120 days of storage periods, but the mortality induced by the other powders was inexpressive. In the three studied storage periods, silica dioxide was the more efficient in reducing adults emergency. At the initial storage period, all the oils caused mortality above 79%, however, after 60 and 120 days, mortality was lower than 2.5%. The adult emergency increased as stored period increased, although at 120 days the best performance was obtained using neem, followed by andiroba, cedar, rosemary and E. globulus oils.