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The consumer market demands food without pesticide residues. Therefore, this study focused on evaluating the control of green mold in Pera orange trees with biocontrol agents (Bacillus subtilis, Bacillus licheniformis and Bacillus subtilis (QST 713)), associated or not with heat treatment. The fruit was obtained in packinghouse before processing, being washed and disinfected with the use of Sodium Hypochlorite. Fruits submitted to these treatments were stored from 11 to 28 days at temperature of 10 °C and RH 90%±5 or for eight days at 20 °C and 90%±5. In general, the heat treatment reduced the disease severity determine by the area under the disease progress curve in the fruit and the incidence of natural postharvest disease in Pera oranges. On the other hand, biocontrol agents did not control the disease, showing that the organisms tested did not present curative activity against the green mold.

Marinho R.C.N.,Federal University of Piauí | Nobrega R.S.A.,Federal University of Recôncavo da Bahia | Zilli J.E.,BR 465 | Xavier G.R.,BR 465 | And 4 more authors.
Pesquisa Agropecuaria Brasileira | Year: 2014

The objective of this work was to evaluate the contribution of efficient nitrogen-fixing rhizobial strains to grain yield of new cowpea cultivars, indicated for cultivation in the Brazilian Semiarid region, in the sub-medium of the São Francisco River Valley. Two experiments were set up at the irrigated perimeters of Mandacaru (Juazeiro, state of Bahia) and Bebedouro (Petrolina, state of Pernambuco). The treatments consisted of single inoculation of five rhizobial strains - BR 3267, BR 3262, INPA 03-11B, UFLA 03-84 (Bradyrhizobium sp.), and BR 3299T (Microvirga vignae) -, besides a treatment with nitrogen and a control without inoculation or N application. The following cowpea cultivars were evaluated: BRS Pujante, BRS Tapaihum, BRS Carijó, and BRS Acauã. A randomized complete block design, with four replicates, was used. Inoculated plants showed similar grain yield to the one observed with plants fertilized with 80 kg ha-1 N. The cultivars BRS Tapaihum and BRS Pujante stood out in grain yield and protein contents when inoculated, showing their potential for cultivation in the sub-medium of the São Francisco River Valley.

Fertilization can influence the production and must composition of vine. Hence, the purpose of this study was to evaluate the effects of organic and nitrogen fertilizer on the yield of drip irrigated wine grape ‘Syrah’ and on the must composition, in three growing seasons (April to August 2010; November 2010 to February 2011; May to September 2011) in Petrolina, State of Pernambuco, Brazil. The treatments consisted of 2 organic fertilizer levels (0 and 30 m3 ha-1 of goat manure) and 5 N levels (0, 10, 20, 40 and 80 kg ha-1), in 5 randomized blocks in split-plot design. The organic fertilization increased the soil organic matter content, the available P, and CEC, as well as decreased the total tritatable acidity in the must in the 1st growing season and increased the yield and the hundred berries weight in the 3rd growing season. The N rates did not influence the number of cluster per plant, neither the fruit yield and enological characteristics. © 2015, Sociedade Brasileira de Fruticultura. All rights reserved.

Azeredo L.P.M.,Federal University of Paraiba | Silva S.M.,Federal University of Paraiba | Lima M.A.C.,BR 428 | Dantas R.L.,PPGA CCA UFPB | Pereira W.E.,Federal University of Paraiba
Revista Brasileira de Fruticultura | Year: 2016

This study had as objective to evaluate the quality of ‘Tommy Atkins’ mango from the Integrated Production (IP) coated with cassava starch (S) associated with essential oils and chitosan. Mango was harvested, at the commercial maturity, from a certified orchard by the Mango IP. The coatings were: Control; S 3%; S 3% + Foeniculum 0.9% (SF); S 3% + Origanum 0.5% (SO), and S 2% + Chitosan 2% (SCH). Coated mangos were stored for 20 days at 12+1°C and 80 + 2% RH and, following, transferred to room conditions (24+2°C; 75+4% RH) for more 12 days, simulating the marketing condition. The combination SCH delayed ripening, maintaining the coloration, soluble solids, and acidity contents, providing mangos with purchase intention and flavor higher than the control. © 2016, Sociedade Brasileira de Fruticultura. All rights reserved.

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