The objective of this study was to evaluate the effect of hydrotherapy associated with refrigeration on the control of peduncular rot in mango fruits (Mangifera indica) of the Tommy Atkins variety. For this, an experiment was set up in the phytopathology laboratory of the Agrarian Sciences Center of the Federal University of Alagoas - UFAL - Delza Gitaí Campus - Rio Largo - AL, from June to December 2018. Mango fruits, previously inoculated with L. theobromae (106 con.mL-1), were immersed in warm water at temperatures of 40, 45, 50 and 55°C for 1, 5 and 10 minutes and then placed under refrigeration for 5 days, then evaluated for disease severity. The results show that hydrotherapy associated with refrigeration is able to control peduncular rot in mango fruits. The temperatures of 50, 55 and 60ºC in the time of 9 minutes of fruit immersion showed 100% control of the disease, in the time of 1 minute only the temperature of 60ºC presented control superior to 90% of the disease, the temperatures of 45 , 50 and 55 presented control of 74.6, 76.2 and 89%, respectively. In the time of 5 minutes, the temperatures of 55 and 60ºC were the best with control superior to 90% of the disease. In all immersion times, the equation that best fit the data was the 3rd degree polynomial. The temperature of 40ºC, in all evaluated times, was the only one that presented control of the disease inferior to 20%.

The fruits of Hymenaea stigonocarpa have a sweet, starchy fibrous structure used as food among wild animals and man in the field. The study aimed to develop and evaluate a biodegradable packaging from the starchy aryl solution of the jatobá fruit (H. stigonocarpa). The amylaceous solution was obtained from the arils of H. stigonocarpa, the biodegradable film was prepared according to the casting technique. The physical-chemical characteristics for thickness (mm), humidity (%), water solubility (%), biodegradability time and transmittance (T%) were evaluated. Morphology by optical micrographic and scanning electron, mathematical modeling in 3D, and for the mechanical parameters of tensile strength, maximum tension, elongation and elasticity module. The results obtained for the biodegradable film were brown yellow color, aroma and homogeneity, thickness 0.27 mm, humidity 12.45%, solubility in water 57.48%, biodegradability of 100%, maximum and minimum transmittance 82.25 and 1.32 (T%), in the optical micrograph small imperfections were observed and in the scanning electron micrograph small cracks. The mathematical modeling in 3D presented a surprising result, which is an important device in the aid of imaging. The mechanical characteristics for maximum tension 3.17 N, rupture stress 1.34 MPa, elongation 2.99% and elasticity with 90.07 MPa presented satisfactory results comparable to other biodegradable films of native starch. Biodegradable packaging from Hymenaea stigonocarpa aryl has great potential for use as a food packaging.

RESUMO A fusariose ou podridão-das-raízes, principal doença na pimenteira-do-reino, causa severa limitação na produção, provocada pelo fungo (Fusarium solani f. sp. piperis). O objetivo desse trabalho foi avaliar o efeito de extratos brutos aquosos e fungicida no controle da fusariose em pimenta-do-reino. Foi avaliado a porcentagem de inibição micelial de F. solani em placas de Petri com meio BDA suplementado com extratos brutos aquosos de folhas (EBA) de pimenta-do-reino, mandioca, mamona, coentro e melão-de-são caetaneo, nas concentrações de 5, 10, 15 e 20% (v/v). A testemunha foi placa com meio BDA sem adição de produto. Para avaliação do efeito dos extratos sobre o desenvolvimento da fusariose, mudas de pimenta-do-reino foram inoculadas com o patógeno, sendo aspergidas com 20 mL dos extratos brutos aquosos de melão-de-são caetano e mandioca nas concentrações de 10 e 15%. O fungicida carbendazem foi pincelado no caules das plantas em forma de pasta na dose (0,2 g.100 mL-1). A avaliação da incidência da doença foi realizada aos 30 dias após a inoculação. Os resultados mostraram que os extratos de melão-de-são caetano e mandioca nas concentrações de 10 e 15%, proporcionaram os maiores percentuais de inibição micelial (61,01 e 57,61% e 51,55 e 55,48%) respectivamente. O EBA de melão-de-são caetano na concentração de 15% e o fungicida foram eficientes em reduzirem a incidência da fusariose em mudas de pimenta-do-reino.

Aims: The objective of this study was to evaluate the best time for planting and nitrogen dose during the dry season that provides better yield to corn crop in the Alagoas Coastal Tablelands region. Study Design: The experimental design was in randomized blocks, in the split plot scheme with four repetitions. Place and Duration of Study: The experiment was developed at the Center of Agrarian Sciences of the Federal University of Alagoas in 2016. Methodology: The plots consisted of 20 lines with seven meters in length and received the four sowing seasons (E1: 28/05/16, E2: 11/06/16, E3: 25/06/16, E4: 22/07/16). The subplots contained 5 lines of 7 meters each and received the nitrogen doses (0, 75, 150 and 225 kg ha-1). The variables analyzed were: Number of grains per ear (NGE), grain mass per ear (GME) and agricultural yield obtained from the weighing of all grains harvested in the useful area of each plot. Results: The variables agricultural productivity and number of grains per ear of corn adjusted to the quadratic regression model, while for the mass of 1,000 grains the linear was better. Grain mass per cob, number of grains per cob, weight of 1,000 grains and yield are influenced by nitrogen rates. The E1 season was the one that provided the highest grain mass per turn (235 g), number of grains per ear (675) and agricultural yield (9.6 t ha-1). For the mass of 1,000 grains, season E2 obtained the highest result (263 g). Conclusion: Maximum corn yield can be achieved by applying 209 kg ha-1 of N, which corresponds to a yield of 9.55 t ha-1 if planted until 06/11/16.

The objective of this work was to evaluate the thermal and biological treatment efficiency of anthracnose (Colletotrichum musae) in banana cv. 'Pacovan'. Three experiments were set up in the laboratory, the first "in vitro" to select the isolate of Trichoderma spp. which had greater mycelial inhibition on plaque, the 2nd "in vivo" was biological control using 2 races of Trichoderma spp. and the 3rd in vivo varying temperatures and exposure times of banana fruits contaminated with Colletotrichum musae. Positive treatments (using fungicide) and negative treatments were done with the application of distilled water only for experiment 2 and 3. The antagonistic biological control agents T2 and T9 were efficient in inhibiting the growth of Colletotrichum musae "in vitro", when analyzed "in vivo" did not have efficiency in the inhibition of the growth of the pathogen. Thermotherapy is a promising technique for the treatment of postharvest rot in banana fruits of 'Pacovan' cultivar, with the best efficiencies observed at 47ºC for 3 and 9 min, and 51º for 3 and           9 min.