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ARMAZENAMENTO DE TOMATES REVESTIDOS COM PECTINA: AVALIAÇÃO COLORIMÉTRICA
2012
EMANUEL NETO ALVES DE OLIVEIRA | JOABIS NOBRE MARTINS | DYEGO DA COSTA SANTOS | JOSIVANDA PALMEIRA GOMES | FRANCISCO DE ASSIS CARDOSO ALMEIDA
The objective of this research was to evaluate the color of tomatoes coated with different concentrations of pectin during storage at room temperature. Were used tomatoes with color greenish-pink divided into four lots: uncoated tomatoes (CT) and covered with biofilms with 2% (P2), 5% (P5) and 8% (P8) of solution of pectin. Initially it was evaluated the rind of tomatoes, then these were cut in half and it was evaluated the pulp (fleshy part), subsequently the two parts of tomatoes were processed in a blender to yield the processed pulp, which also was evaluated. Evaluations were done at 0, 2, 4, 7, 11 and 16 days storage with analysis of luminosity (L*), intensity of red (+a*) and intensity of yellow (+b*) in portable spectrophotometer. It was observed in all treatments that the rind and the fleshy and processed pulp showed a reduction in the values of L*. At the end of the storage, the treatment CT showed the highest values +a* for the rind and the fleshy and processed pulp, followed of the treatments P2, P5 and P8, respectively. The values of +b* decreased in the rind and in processed pulp of the CT and P2 treatments, but increased in the P5 and P8 treatments. It is concluded that the use of edible coatings pectin is effective to retard development of coloration typical of ripe tomato, results to be associated with the evaluation of physical and chemical parameters for a respect to retardation of the ripening.
显示更多 [+] 显示较少 [-]NÃO PREFERÊNCIA PARA ALIMENTAÇÃO E ASPECTOS BIOLÓGICOS DE Spodoptera eridania EM CULTIVARES DE FEIJÃO-CAUPI
2012
BRUNO HENRIQUE SARDINHA DE SOUZA | ARLINDO LEAL BOIÇA JÚNIOR | ANDERSON GONÇALVES DA SILVA | NARA ELISA LOBATO RODRIGUES
The aim of this paper was to evaluate the no-preference for feeding and biological aspects of Spodoptera eridania fed on cowpea cultivars BR17 Gurgueia, BRS Urubuquara, BRS Nova Era, Sempre Verde, BRS Milênio and BR3 Tracuateua. In free-choice test, leaf discs were placed in Petri dishes where one third instar larvae per cultivar was released, whereas in no-choice test one leaf disc was placed per Petri dish where one caterpillar per cultivar was released, evaluating their attractiveness after 1, 3, 5, 10, 15, 30, 60, 120, 360 and 720 minutes, as well as the leaf area consumed. Randomized blocks and complete randomized blocks design were used for free-choice and no-choice tests, respectively, with six treatments and 10 replications. The evaluation of the biological parameters of S. eridania was carried out in Petri dishes where recently hatched caterpillars were transferred in the proportion of one per dish, and the leafs of the cultivars were offered to them during the whole larval period, and we evaluated: periods and viabilities of larvae and pupae, overall viability, weight of larvae and pupae, sex ratio, longevity and overall cycle. Complete randomized design was used with six treatments and 30 replications. In no- preference for feeding free-choice test the cultivars Sempre Verde and BR17 Gurgueia were the most and the least consumed, respectively. Regarding the effects of cowpea cultivars on larval viability we can infer that BRS Urubuquara and Sempre Verde show antibiosis-type resistance to S. eridania.
显示更多 [+] 显示较少 [-]CARACTERIZAÇÃO FLORÍSTICO-FITOSSOCIOLÓGICA DO COMPONENTE LENHOSO DE UM TRECHO DE CAATINGA NO SEMIÁRIDO PARAIBANO
2012
ROZILEUDO DA SILVA GUEDES | FERNANDO CÉSAR VIEIRA ZANELLA | JOSÉ EDIMAR VIEIRA COSTA JÚNIOR | GREGÓRIO MATEUS SANTANA | JOSUEL ARCANJO DA SILVA
The caatinga vegetation has many physiognomies and in a general way is degraded by human pressure, so it is important to characterize phytosociologically its various facies. This study aimed to characterize the composition and structure of the woody component of a relatively homogeneous remnant of caatinga vegetation in semiarid region of Paraiba, in a region locally called as Seridó. We sampled all shrub-tree species, alive or dead, still foot, with basal circumference > 10 cm (at 30 cm from the base) and total height > 1m. Ten plots of 20 x 20 m were allocated, randomly distributed across the study area. The total density was 1622.5 ind./ha, distributed in 21 species, 21 genera and 11 botanical families. The main species, according to the index of importance value were Poincianella pyramidalis (Tul.) L.P. Queiroz, Aspidosperma pyrifolium Mart., Commiphora leptophloeos (Mart.) J.B. Gillett and Anadenanthera colubrina (Vell.) Brenan. Despite being an area that is considered well preserved within the region, the studied community has a high density of individuals with small diameter shafts (D0,3 ¿ 6 cm) (63%). The Shannon index (3.38) may be considered medium and the Pielou equability (0.85) indicates floristic heterogeneity of the shrub-arboreal component. The floristic composition and species richness are similar to those found in other studied areas of the region, except by the high abundance of Commiphora leptophloeos and Amburana cearensis (Allemão) A.C. Sm.
显示更多 [+] 显示较少 [-]SUBDOSAGENS DE Bacillus thuringiensis EM Plutella xylostella (LEPIDOPTERA: PLUTELLIDAE) E Trichogramma pretiosum (HYMENOPTERA: TRICHOGRAMMATIDAE)
2012
SERGIO ANTONIO DE BORTOLI | ALESSANDRA MARIELI VACARI | GUSTAVO OLIVEIRA DE MAGALHÃES | WANDERLEI DIBELLI | CAROLINE PLACIDI DE BORTOLI | MURILO PETRINI ALVES
The aim of this paper was to evaluate the biological aspects of Plutella xylostella and Trichogramma pretiosum in eggs of the F2 generation of P. xylostella under the influence of Bacillus thuringiensis in laboratory conditions. The experiment was conducted in the Laboratório de Biologia and Criação de Insetos of Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal - UNESP reen collars contaminated with strains and commercial product based on B. thuringiensis in the laboratory. The eggs obtained from the F2 generation of P. xylostella evaluated the biological parameters of T. pretiosum. It was observed that some biological characteristics of P. xylostella showed changes by the treatment with B. thuringiensis. The viability of the larvae and pupae stages, pupae weight were the biological parameters more influenced by treatments, with values significantly reduced when compared to control. However, the larvae length and pupae stages and sex ratio were similar in all treatments, with no significant biological variations. Thus, this bacterium isolated from this behavior may provide greater exposure of larvae to other natural enemies as well as generation of adults less viable, which makes them potential programs in pest control, since the interaction of the methods of control is one of the main ways to enhance the biological control of insect pests. It was observed sublethal effects on P. xylostella biology, and B. thuringiensis negative influence on the parasitism capacity and emergency of T. pretiosum.
显示更多 [+] 显示较少 [-]EFEITO DE ÓLEOS ESSENCIAIS E REVESTIMENTOS COMESTÍVEIS SOBRE PODRIDÕES PÓS-COLHEITA EM MANGA, CV. KENT
2012
MARCELO DE MENEZES CRUZ | SEVERINA RODRIGUES DE OLIVEIRA LINS | SÔNIA MARIA ALVES DE OLIVEIRA | MARIA ANGÉLICA GUIMARÃES BARBOSA
The search for new antimicrobial agents from plants is intense due to the increasing resistance of pathogenic microorganisms to synthetic products. Moreover, the long term use of pesticides cause negative impacts to society and the environment due to pollution caused by chemical waste. The aim of this paper was to evaluate the effect of Lippia sidoides and Piper aduncum oils, carnauba wax and dextrin to control stem-end rot of mango. Fruits of mango cv. Kent were inoculated with suspensions of 106 (conidia/mL) of Lasiodiplodia theobromae or Botryosphaeria dothidea, and after 24 hours there were applied the treatments. The experiment was organized on a completely randomized design with three replications and the experimental unit was composed of a tray containing six fruits. After eight days in cold storage (10 ± 2 º C) the fruits were placed for five days at room temperature (25 ± 2 º C) when were evaluated daily for the disease severity. The best treatments were Lippia sidoides and Piper aduncum oils that showed specificity to control stem-end rot caused by L. theobromae and B. dothidea on mango.
显示更多 [+] 显示较少 [-]BIOMETRIA E DESENVOLVIMENTO DE PINHÃO-MANSO IRRIGADO COM DIFERENTES LÂMINAS DE ÁGUA RESIDUÁRIA E ADUBAÇÃO FOSFATADA
2012
ANTONIO EVAMI CAVALCANTE SOUSA | HANS RAJ GHEYI | FREDERICO ANTONIO LOUREIRO SOARES | ELKA COSTA SANTOS NASCIMENTO | LEANDRO OLIVEIRA DE ANDRADE
The population growth not only demands further exploration and use of water, but generates different types of wastewater, such as sewage which is dumped directly into watercourses. In this context, the aim of this study was to evaluate the influence of the use of wastewater from domestic sources on the growth of plants of physic nut during the third year of production under protected ambient. A randomized block design in a 5 x 2 factorial scheme was used, the factors being five levels of water replacement - WR (0.25, 0.50, 0.75, 1.00 and 1.25 times water consumed by the plant) and two levels of phosphorus (135 and 200 g plant-1 year-1) with four replications. Plants were grown in recipients with a capacity of 200 L and in the beginning of the 3rd year of production (present study) a drastic pruning was performed. The variables plant height, stem diameter; leaf number and leaf area of the physic nut were influenced by the depth of water replacement from 30 days after pruning (DAP). The leaf number and stem diameter were affected by phosphorus dose at 30 and 90 DAP, respectively. The plant height and leaf area were influenced by the interaction (WR x phosphorus dose) at 30, 60 and 90 DAP. The weight of the fruit and water use efficiency of physic nut were affected by the depth of water applied but were not influenced by phosphorus dose.
显示更多 [+] 显示较少 [-]ANÁLISE DE INVESTIMENTO NA CARCINICULTURA DO RIO GRANDE DO NORTE: UM ESTUDO DE CASO
2012
SAMANTHA LARISSA GONÇALVES DA SILVA | FREDERICO SILVA THÉ PONTES | FELIPE MOURA PONTES | AMBROSIO PAULA BESSA JUNIOR | DENISON MURILO DE OLIVEIRA
The paper aimed to examine the equity investment in shrimp production, a typical farm of the western region of Rio Grande do Norte, using the following criteria for project selection: Net present value (NPV), Internal Rate of Return (IRR), payback and Cost/benefit analysis (C/B). In a complementary manner it has evaluated the likelihood of change in Net Present Value and Internal Rate of Return, through the risk analysis. In the risk analysis input variables (inputs) were considered: the price paid to producers per Kg of shrimp and price of Kg of ration HD-35%, which represents 36.42% of the total cost per production cycle. The selected variables or (outputs) were the Net Present Value at 12% and 6%, and the Internal Rate of Return. The results of investment analysis, without considering price risk were: R$ 214,943.93 NPV 12% NPV 300,819.13 6%, 60% IRR, payback of two years and 1,4 Interface B/C. The survey results indicate that shrimp farming represents for the rural sector of Rio Grande do Norte, a leading alternative investment, considering that the average IRR, considering the risks of price, was 35.21%, ie any other investment would only be desirable, in comparison with investment in shrimp production, if present rate of return higher than 35.21%.
显示更多 [+] 显示较少 [-]CRESCIMENTO DE PROGÊNIES DE Heteropterys tomentosa A. Juss. EM CONDIÇÕES DE CASA DE VEGETAÇÃO
2012
CARLA SPILLER | MARIA DE FATIMA BARBOSA COELHO | RODRIGO ALEIXO BRITO DE AZEVEDO
Heteropterys tomentosa A. Juss. belonging to the Malpighiaceae family has its roots extracted and used in the Cerrado of Mato Grosso, mainly as a tonic and aphrodisiac. Evaluation of seedling growth may provide information for growing and selecting plants of the species. In this paper the aim was to evaluate the growth of progenies of H. tomentosa in a greenhouse. 30 progenies were evaluated in a randomized experimental design with three replications of 10 plants per plot. The variables analyzed were height (cm/plant), diameter (mm/plant) and number of leaves/plant. The plants were grown at an average speed of 0.38 cm per day. However, the average speed was higher at 120 days, with about 0.53 cm.day. The diameter increment was much lower in the first 60 days, about 0.01 mm.day, but there was an increase to 0.03 at 100 days, 0.02 mm.day stabilizing again to the end of 150 days. The increase in speed to the number of leaves at 45 days and 105 days was the same (0.13 leaves.ind.day). However, it was between 60 and 90 days after planting that the growth rate was higher (0.26 leaves.ind.day). The highlights were significant associations between fresh weight and dry weight and between length and weight of the plant. It is concluded that the seedlings of H. tomentosa kept in a greenhouse grow up too quickly and can be transplanted to grow efficiently. The selection of individuals for increased root production can be done by those with the greatest number of leaves.
显示更多 [+] 显示较少 [-]CONSUMO DE ÁGUA E DESEMPENHO PRODUTIVO DE CAPRINOS RECEBENDO RAÇÕES CONTENDO DIFERENTES TEORES DE CAROÇO DE ALGODÃO EM SUBSTITUIÇÃO A SILAGEM DE MANIÇOBA
2012
JOÃO BOSCO LOIOLA FILHO | BETINA RAQUEL CUNHA DOS SANTOS | DANIEL BONFIM MANERA | DANIEL MAIA NOGUEIRA | TADEU VINHAS VOLTOLINI
The goal of this present paper was to evaluate the productive performance of feedlot goats fed with wild cassava silage based rations and growing levels of whole cottonseed. Whole cottonseed levels evaluated were: 10.0%; 20.0%; 30.0% and 40.0% of dry matter. Twenty four male goats, non castrated, non defined genotype, weighting 9.4±2.0 kg of body weight were used. Experimental design was a completely randomized with four whole cottonseed levels and six replicates. Increasing whole cottonseed levels was observed higher average daily gain and total weight gain of goats. On the other hand, final body weight and total water intaked were not affected by whole cottonseed levels in rations. Besides, water intake from ration corresponded for the most part of total water intaked daily by animals. Increasing whole cottonseed level until 40% of dry matter for feedlot kids goats may promote higher average daily gain and total weight gain, without affect water intake.
显示更多 [+] 显示较少 [-]POTENCIAL DE PRODUTOS BIÓTICOS E ABIÓTICOS COMO INDUTORES DE RESISTÊNCIA NO CONTROLE DE PODRIDÕES PÓS-COLHEITA EM MANGA, NO SUBMÉDIO SÃO FRANCISCO
2012
MARIA DALVA DA CONCEIÇÃO SILVA DE MOURA | ANA ROSA PEIXOTO | EDVANDO MANOEL DE SOUZA | ROGÉRIO DOS S. MARTINS | LEONARDO SOUSA CAVALCANTI
With the purpose to minimize the incidence of stem-end rot, mango, caused by Lasiodiplodia theobromae, Fusicoccum aesculi, and Colletotrichum gloeosporioides, five resistance inductors were tested under field conditions: (T1) absolute control (no treatment); (T2) Fosetyl-AL; (T3) Agromós; (T4) Calcium Phosphite; (T5) Potassium Phosphite: (K30) and (T6) Acibenzolar-S-methyl; which were compared to the control treatment, to the conventional treatment on the farm (T7) compound: Pyraclostrobin; Thiophanate methyl; Azoxystrobin; Difeconazole; Tebuconazole; Thiabendazol; Tetraconazole. The sprayings were performed using a knapsack sprayer in a total of seven applications with 15-day intervals. The statistical design was a randomized block design with seven treatments and four replications, with each plant being considered a repetition, totaling 28 plants. Incidence of post-harvest rot was obtained for 77.9% of the treated fruit. No significant difference between the tested resistance inducers was observed, not even regarding the control. However, the conventional treatment (T7), adopted by the farm, showed a 25% disease incidence only and diverged statistically from the others. Studying the etiology of the rot, high indices of C. gloeosporioides, with 75% incidence, were verified, followed by L. theobromae, F. aesculi, A. niger and Alternaria sp, with incidence of 11%, 5.5%, 2.7% and 1.3%, respectively. Moreover, 4.3% of non-identified micro-organisms were detected.
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