Abstract: The species Tecoma stans L. from the Bignoniaceae family, popularly known as the garden ipê or ipê mirim, is considered a natural tree plant in Mexico and in the southern United States. It was brought to Brazil in 1871 as an invasive plant of degraded agricultural and abandoned pastures, much used in ornamentation of cities. The present work aimed to verify the efficiency of the alternative dyes boldo, bacupari, azul crepom and colorau, compared to the synthetic dye Lugol. In the preparation of the Lugol slides and the alternative solutions, the anthers were macerated with a drop of dye and covered with cover slip. For each dye were made five slides and counted 300 pollen grains / blade, adding a total of 1,500 pollen. The visualization of the material was performed through an optical microscope in dimension of 40x by the scanning method. The data were submitted to analysis of variance and the means were compared by the Tukey test at the 5% probability level. According to the data verified in the analyzes it was verified that all the dyes can be recommended for evaluation of the male fertility of the species Tecoma stans L. and that it presents high capacity fecundity. However, in the case of alternative dyes, the solution of paprika and paper crepe were the ones that presented the best results regarding the coloration of the pollen grain, presenting a better visual differentiation of the same between feasible and non viable.Â

Digital image processing, when applied to the study of leaf area, allows the integration of the direct measurement and non-destructive, and thus preserves the integrity of the plant. The objective was the quantification of the leaf area of soybean, cv. FTS Paragominas RR, submitted to different treatments of seed with the use of the computer program ImageJ, and basic presuppositions of image processing. The experiment was conducted at the Center of Agrarian Sciences and Environmental, Federal University of Maranhão, in Chapadinha (MA), in the period from February to June 2018. The seeds of soybean 'Paragominas RR' were submitted to the technique of seed treatment, consisting of three fungicides of the active ingredients, thiophanate methyl + fluazinam, fludioxonil and carbendazim + tiram, an insecticide active ingredient fipronil and the control. The leaf area was analyzed in the growth phase, through the use of digital camera and ImageJ®. The use of the routines in the computer program ImageJ® were effective for the determination of leaf area of the soybean submitted to different treatments of the seed. The thiophanate methyl + fluazinam in the dose 200 mL per 100 kg of seeds showed beneficial effects on growth of the cv. FTS Paragominas RR, as estimated by the leaf area.

Irrigation systems may exhibit variations in performance when poorly dimensioned or depending on the time of use. In this sense, the objective of this study was to evaluate the performance of irrigation systems located by micro sprinkler and drip irrigation in the sweet potato crop in a family property in the municipality of Guaraciaba do Norte-CE. The property under study in this research has a total area of 2.5 ha. The area cultivated with sweet potatoes is 120 m2 with 50% of the area irrigated by drip irrigation and the remainder irrigated by micro sprinkler. In order to analyze the performance of the irrigation systems, the methodology proposed by Keller and Karmeli (1975) was adopted, in which the flow rates of the emitters are determined in pre-established positions. Were determined the coefficients of uniformity of Christiansen (CUC); coefficient of statistical uniformity (CUE); Hart uniformity coefficient and distribution uniformity coefficient (CUD). Irrigation systems presented uniformity coefficients higher than 90%, for all the equations applied in this work, both also presented application efficiency higher than 85%. Due to the high coefficients of uniformity found it was concluded that the irrigation systems located on the property were well sized and mounted

The growth and production of agricultural crops are greatly hampered by weed interference. The objective of this study was to evaluate weed infestation and growth and dry mass of cowpea cultivated in soil with solarization and mulching. The research was carried in the Agricultural Sciences Center of the Federal University of Alagoas, Rio Largo, AL. A completely randomized experimental design was used, with eight treatments and four replications. The treatments consisted of the combination of soil with and without solarization together with different mulching, such as T1: Os tratamentos consistiram da combinação de solo com e sem solarização junto a diferentes coberturas mortas, como sendo T1: solarized soil with mulching of castor bean, T2: solarized soil with mulching of rattlepod, T3: solarized soil with mulching of spontaneous vegetation, T4: solarized soil without mulching, T5: non-solarised soil with mulching of castor bean, T6: non-solarised soil with mulching of rattlepod, T7: non-solarised soil with mulching of spontaneous vegetation and T8: non-solarised soil and without mulching. The number of weeds was higher in treatments without mulching, independent of solarization, T4 and T8. Already, the growth of the plants and the number of bean leaves were higher in the solarized soil with mulching of castor bean, T1, and lower in the non-solarized soil and without mulching, T8, in contrary to the dry mass of the root. Solarization with solar collector when associated with mulching inhibits the infestation of weeds in cowpea, while its growth is benefited by solarization + mulching, by mulching without solarization, as well as the solarization without mulching.

The objective of this work was to evaluate the effect of different doses of silicon on the production of lettuce seedlings. The treatments were arranged in a 4x2 factorial scheme, totaling 8 treatments. The first factor corresponded to 4 Si doses (Ca silicate) added to the substrate for seedling production (0; 13.3; 32.3 and 53.2 g.kg-1 of Si on the substrate). The second factor corresponded to two varieties of lettuce, being Mônica SF31 (Crespa) and Rafaela (Americana). The experimental design was the completely randomized, with 4 replicates. The number of leaves (NF), fresh aerial mass (MFPA), dry shoot mass (MSPA), fresh radicular mass (MFRA) and root dry mass (MSRA) were evaluated. Data were submitted to analysis of variance by the F test, and the means of the treatments compared by the Tukey test at 5% probability. The seedlings of the Mônica SF31 and Rafaela lettuce varieties do not present differences regarding the Si requirement for the production of MFPA, MSPA, MFRA and MSRA. The application of Si to the substrate can be a viable alternative for the production of lettuce seedlings with higher NF, MFPA, MSPA, MFRA and MSRA. Doses of 32.0 to 43.7 g.kg-1 of Si in the substrate are suitable for higher production of MFPA, MSPA, MFRA and MSRA of lettuce Mônica SF31. Doses of 31.5 to 39.8 g.kg-1 of Si in the substrate are suitable for higher production of MFPA, MSPA, MFRA and MSRA of Rafaela lettuce seedlings.

The orchids have a great diversity of genus and species, which contributes to a singular wealth of flowers, that present immense variation of colors and forms. Within the trade of ornamental plants orchids constitute a promising area of agribusiness, with high added value. However, one of the major limitations for the production of these plants is the incidence of diseases, mainly caused by fungi. In this context, the objective of the study was to isolate and identify fungi from orchids with a symptomatological picture of disease of fungal etiology. The incidence of 3 genera of pathogens of fungal etiology in 10 genera of orchids was verified. The causal agent with the highest percentage of frequency was Nigrospora sp.

The lupine has great potential for human nutritional supplementation, in addition to having lower concentrations of alkaloids than soybeans. It is easy to grow, low-cost and is being studied as a way to improve the nutritional value of some food products. To carry out all analyzes were used seeds of Lupinus angustifolius and Lupinus albus, provided by the Agronomic Institute of Paraná - IAPAR. It was determined, as of the lupine seed flour: the composition, solubility, emulsifying capacity, foaming capacity and foam stability. The white lupine had significantly higher percentage of lipids (10.57%) compared to the values of blue (4.20%). Still, the white lupine had a higher percentage of protein (35.45%), although its value is very close to that found in blue (32.48%). Was observed a value of 48.85% carbohydrates for white lupine and 58.90% for blue. As the ash, there was a similar value in both strains (3.9% for white lupine and 3.96% for blue). For moisture, had up 2.81% for white lupine and 1.27% for blue. Emulsifying capacity was higher in blue lupine (4.00 mL / g) than in white lupine (2.27 mL / g). As for the foaming capacity, there was greater capacity for blue lupine (5.54% growth, against 1.47% of white lupine). Finally, was observed higher foam stability in the white lupine. It is concluded that the lupine presents technological properties and chemical composition that makes it useful and their use justified by the food industry.

Lettuce (Lactuca sativa) belongs to the asteraceae family, known worldwide and appreciated for generations. Due to the great acceptance, the lettuce is a vegetable of high consumption. In search of solutions for high productivity some techniques have been researched to reduce the stress suffered by the plant to the environment. This study aimed to verify that the aqueous extract of tiririca, in different strengths, present some allelopathic effect on the development of the lettuce. The use of the aqueous extract, which has in its composition the Indole Acetic Acid-AIA (Auxin), was used by capillary irrigation, with the following treatments: T0-control; T1- 25% of concentration; T2- 50% of concentration; T3- 100% of concentration. This study consisted of five replicates and five plants per treatment, with a total of 100 plants. The design was completely randomized. The analyzes were root size, shoot development by fresh mass plant, number of leaves and chlorophyll content. According to the data, it was observed that the concentration of the 100% root extract resulted in higher values of root development, however, affected shoot growth, a result verified in the fresh mass, in which the plants presented reduced weight when compared to the other treatments, and consequently affected the amount of leaves produced by the plants submitted to this treatment, the chlorophyll content was also lower for the plants treated with the maximum concentration of the extract. Therefore, it can be concluded that high dosages of the tiririca extract had an allelopathic effect inhibiting the growth and development of the lettuce plants, and did not present a satisfactory result.

Northeast region characteristic of the brazilian plant, the umbu has several possibilities, such as jams, juices, jams, due to your characteristic bittersweet. Fruit processing can be accomplished using standard form conventional sugar, and to meet the need of people with diseases requiring restriction on sugar consumption, it can be replaced by culinary sweetener. In order to reduce the losses of the fruit in post-harvest, and to ensure that the product can be consumed by people restricted to the sugar, this work aims to produce traditional jams and zero sugar so that it can be evaluated and sensory analysis index of acceptability of these products on the market. In order to analyze the acceptance of standard and zero sugar jam was performed sensory analysis, performing the procedure with the collaboration of 50 untrained for completing the evaluation form. The participants were distributed in 52% of the audience was female and 48% male. The parameters analyzed presented in results for the analysis of conventional jams, as a result of greater adaptation of assessors for conventional products. With this it should be noted at the end of the analysis for all parameters analyzed the umbu jelly zero sugar formulation. Although both formulations have presented good acceptances by the evaluators, that may be good investment options for market diversification, since the use of fruits in the cerrado is unusual for the production of by-products.

In Brazil, inoculation with Bradyrhizobium japonicum strains is the main form of N assimilation by soybeans, but there are reports of the use of mineral N as a complement to the demand of this nutrient by the plant. The objective of this work was to verify the effect of different forms and times of N application on vegetative growth and soybean crop yield in northern Mato Grosso. The experimental design was a randomized block design (DBC) with 10 treatments: control (no N application); and in all other treatments 10 kg ha-1 of N was applied, changing season and form of application as: the haul in cover at planting; in V2 at hedging; in V2 via leaf; in V4 at hedging; of N in leaf V4; from N in R1 to hedging; N in leaf R1; in R2 at cover and in R2 leaf. The cultivar used was Bonus from Brasmax®. Vegetative growth was evaluated by height, stem diameter, shoot dry mass, nodulation by number of nodules and yield by variables, number of pods, grains per pod, mass of 1000 grains, and weight. productivity. In practically all variables analyzed, no effects of nitrogen application on soybean crop were verified. The shoot dry mass was higher when nitrogen was applied to V2 via foliar spraying and to V4 in soil cover. In general, although there was no statistical difference between treatments, N application at the beginning of crop development increased soybean yield. The application treatment V2 was the most productive, produced 34% more than the control without N, or 17.34 more bags than the control.