No abstract

Aims: The objective of this study was to evaluate peach fruits quality after chemical thinning using metamitron at different times in the South of Brazil. Study Design: The experimental design was in randomized blocks, with five replications of three plants, fruits were harvested and evaluated the central plant in the plot, and twenty fruits were evaluated in each replicate.

'Pinot Noir' grape shows sensitivity to cluster rot (Botrytis cinerea) because bunches are small and compact, causing economic and qualitative losses in vinery and fresh grapes. The objective of this work was to evaluate the effect of different doses of gibberellic acid (GA 3) on rot incidence of 'Pinot Noir' grapevine. The experiment was carried out for two years. The treatments were GA 3 doses of 0; 2; 4; 6 and 8 mg L-1 applied at the developed inflorescence (DI) on 14-year-old plants. The results showed that rot percentage in the two crops decreased from 24.75% to 20.72% with application of GA 3. The clusters length was higher when GA 3 doses of 4; 6 and 8 mg L-1 were applied, compared to the control and 2 mg L-1 of GA 3. The rachis length increased after 4; 6 and 8 mg L-1 of GA 3 application doses, when compared to the control and 2 mg L-1 of GA 3. The cluster width increased after application of GA 3 doses, compared to control. Larger rachis width was observed after application of 4, 6 and 8 mg L-1 GA 3 , compared to the control. Bunch mass was increased with the use of GA 3 at 2 and 4 mg L-1 doses, compared to the control and GA 3 6 and 8 mg L-1 doses. Regarding the soluble solids, there were higher values in the control and 2 mg L-1 of GA 3. Thus, in the 'Pinot Noir' grapevine, application of GA 3 decreased clusters rotting and increased clusters and rachis lenghts.

As práticas tecnológicas empregadas no cultivo de pessegueiro são determinantes na produção e na qualidade das frutas e devem ser definidas com uma visão de sustentabilidade ecológica e econômica. O objetivo deste trabalho é caracterizar e identificar o nível de adoção de práticas culturais e tecnologias no cultivo de pessegueiro. Neste estudo, foram elencados quatros perfis de produtores, que contemplassem, em seus sistemas de produção, níveis diferenciados de produtividade e a identificação dos principais aspectos tecnológicos adotados na produção de pêssego destinado a indústria. Na safra de 2018/2019, foi realizada a aplicação presencial de questionário semiestruturado a 20 estabelecimentos produtivos, caracterizando o manejo e a tecnologia de produção adotada frente as dimensões fitotécnicas de implantação do pomar, manejo e tratos culturais, manejo fitossanitário e colheita e pós-colheita. Os principais fatores limitantes encontrados na produção de pêssegos decorrem do deficitário preparo do solo previamente ao plantio, não emprego de análise do solo e foliar para correção e adubação, juntamente com desconhecimento sobre o porta-enxerto utilizado nos pomares. Além disso, a mosca da fruta e a podridão parda demandam esforços e recursos para assegurar o manejo fitossanitário adequado a produção de pêssegos. De uma forma geral, adoção tecnológica e inovações demonstram capacidade de elevar a produtividade da produção de pêssegos os pomares, no entanto, sua adoção depende de ações estratégicas na transferência de tecnologias que implementem e assegurem a sustentabilidade ambiental e econômica do setor.

For strawberry cultivation in Brazil, producers are dependent on imported seedlings. An alternative strategy to reduce this dependence is the use of seedlings obtained from nursery plants grown in a protected environment. However, as these seedlings are produced in the summer and planted at the end of this season or the spring of the following year, it is necessary to control growth to reduce the energy costs of the plants. The objective of this study was to evaluate the effect of different concentrations and periods of application of proexadione calcium (ProCa) on growth control of strawberry seedlings. The experiment was carried out in a greenhouse with seedlings of the cultivars ‘Aromas’ and ‘Camarosa’, produced by rooting stolons and kept in polystyrene trays of 72 cells in a substrate of carbonized rice husk. The experimental design was completely randomized, with a 4 × 2 factorial scheme (4 concentrations of ProCa: 0, 100, 200, and 400 mg L-1 × 2 periods of application: at 20 and 30 days after the planting period of rooting stolon). Plant survival, crown diameter, petiole length, total leaf area, specific leaf area, chlorophyll concentration, and dry mass of the crown and shoot were evaluated. The application of ProCa at 20 days after the planting period of the rooting stolon at the concentrations of 200 and 400 mg L-1 favored the reduction of petiole length in plants of ‘Aromas’ strawberry and total leaf aerial in ‘Camarosa’ strawberry. The application of ProCa from the concentration of 100 mg L-1 reduced the vegetative growth of ‘Aromas’ and ‘Camarosa’ strawberry seedlings cultivated in substrate.