Dili Luiza de Oliveira

Rhizobacterium and acibenzolar-S-methyl (ASM) in resistance induction against bacterial blight and expression of defense responses in cotton

The effect of acibenzolar-S-methyl (ASM) and the rhizobacterium isolate L2-1 (Bacillus cereus), applied either alone or in combination, was evaluated in cotton plants for resistance induction against Xanthomonas axonopodis pv. malvacearum. Bacterial blight severity, lignin content and the activities of phenylalanine ammonia-lyase (PAL), peroxidase (POX) and b-1.3 glucanase (GLU) were assessed at different time courses. ASM and L2-1, used alone or in combination, significantly reduced disease severity, while ASM alone was the best treatment for bacterial blight control. No synergistic effect was observed when ASM was associated to isolate L2-1. ASM induced the highest increases in the activities of PAL, POX and GLU as well as lignin deposition, mainly 14 days after treatment application. When ASM and the rhizobacterium were simultaneously applied, enzyme activities were always lower, compared to ASM alone.

Utilização de água residuária de suinocultura na produção de mudas de maracujazeiro-azedo cv Redondo Amarelo

Besides being a nutrient source, the swine wastewater is a practice of water reutilization and it avoids water and soil pollution. This work was carried out to evaluate the swine wastewater application for yellow passion fruit development. It was used the completely randomized block design, in a 5 x 2 factorial scheme, with four replications and seven plants per plot, being the wastewater levels (0, 25, 50, 75 and 100 percent) and substrates (commercial and soil + sand mixture, in the proportion of 2:1). After 60 days, it was evaluated the length of both the aerial part and the root system (cm), leaves number, leaf area (cm2) and dry matter weight from both the aerial part and the roots (mg) and both foliar and fertility analysis of the sand/soil mixture substrat. The best passion fruit seedlings development happened with the swine wastewater application at levels 100 percent. The swine wastewater utilization in initial stage supplied the nutritional demand of the passion fruit seedlings without the supplement of commercial fertilizers. The commercial substrate utilization provided a higher passion fruit seedlings development.

Enraizamento de estacas semilenhosas de cultivares de oliveira

The aim of this study was to evaluate the semi-woody rooting of cuttings from 35 olive cultivars collected at two different times (April and August). The experimental design was the completely randomized in factorial 35x2, with 4 replicates and 25 cuttings per plot. The cuttings were standardized to 12 cm long and 4-6 internodes, with four entire leaves in the apical region. The treatment with hydroalcoholic solution of indolebutyric acid (IBA) at concentration of 3 g L-1 was performed by immersion of 3 cm from the base of the cuttings in the solution, for five seconds. The cutting was planted in sand and placed in greenhouse with intermittent mist. After 70 days, there was a significant variation in rooting among the olive cultivars. The cultivars MGS MANZ215 and MGS TAF390 showed higher rooting capacity. The cuttings collected in April presented higher rooting as compared to those ones collected in August for some of the cultivars evaluated.

Características físico-químicas de cultivares de macieiras pouco exigentes em frio

Southern Brazil is a traditional apple-growing region. However, new less cold-demanding cultivars are making the cultivation of apples viable in other Brazilian regions, such as in the state of Minas Gerais, where the crop is in a remarkable expansion. The quality attributes of the fruits are important both to the industrialization and the fresh consumption. In this sense, this work was aimed at characterizing fruits of different less-cold demanding apple cultivars established on the Mantiqueira Mountains, South of Minas Gerais. The experiment was conducted in an experimental orchard in Empresa de Pesquisa Agropecuaria de Minas Gerais EPAMIG (Minas Gerais Agricultural Research Company - EPAMIG) in the municipality of Maria da Fe south of Minas Gerais. Fruits of of eight apple cultivars from six-year-old plants were evaluated (Michal, Ein Shemer, Soberana, Galicia, Eva, IAC 2079, Condessa and Anna). Fruit mass, transversal diameter, longitudinal diameter, fruit firmness, production, total acidity (TA), total soluble solids (TSS), TA/TSS ratio, pH and fruit yield were recorded for each cultivar. The cultivars Anna and Condessa yielded the largest fruits; cv. Eva produced the firmest and the highest yielding cultivar; cv. Anna produced the softest fruits, while Galicia and IAC 2079 produced fruits of the most balanced flavor.

Qualidade da maçã cv. Eva produzida em duas regiões de Minas Gerais

Eva apples are the main cultivar produced in the state of Minas Gerais, Brazil, where they have been gaining space on the market due to their colour and flavour characteristics and their early harvest. This study aimed to evaluate the physical and chemical characteristics of fruits from the cultivar Eva at five distinct times in the same crop year (11/11, 16/11,. 23/11, 30/11 and 02/12 in the year 2012) in the municipalities of Maria da Fe and Piedade do Rio Grande (MG-Brazil). The experimental design used was a 2 x 5 completely randomized factorial scheme with 10 treatments, five replications and five fruits per replication. Mass, firmness, titratable acidity and soluble solids of the fruits were evaluated. There were significant differences for all the characteristics evaluated. The best quality fruits were obtained from the last harvest (12/2/11) at both locations. However, harvesting before December 2nd allowed for a better remuneration of the producer, due to a lack of the product on the market.

Flowering and vegetative growth of olive tree submitted to pruning and paclobutrazol application

This work focuses on the evaluation of flowering and vegetative growth of olive tree submitted to pruning and paclobutrazol application under field conditions with low temperatures during the winter. Two-years-old olive plant variety Grappolo 575, were submitted to light pruning, removing apical dominance, before treatments application. The treatments were organized in a 4×2 factorial scheme, respective to four PBZ concentrations tested: 0, 200, 400 and 800 mg L-1 of PBZ and two plants groups, with and without pruning, in randomized block with four replications. Paclobutrazol concentrations tested did not affect the olive tree flowering. The plant vegetative growth was reduced until 60 days after paclobutrazol application. Pruning resulted in stimulation of emission of vegetative shoots and reduction of flowering.