Winter cold deficit in low subtropical climate region and blackberry varieties phenology

In the western region of Paraná, the subtropical climate prevails, with little accumulation of hours of cold in the winter, making the fruit species not go into complete dormancy. Given the above, the objective of this study was to evaluate the effect of chemical defoliant on blackberry varieties, aiming at their complete defoliation and induction of numbness. The work was conducted at Unioeste, Marechal Cândido Rondon Campus, in a four-year-old orchard of plants, spaced 3 x 0.5 m, simple spreader with two wire strands at a height of 120 cm from the ground, and 20 plants per grow crops. The experimental design used was randomized blocks, where two treatments related to the application of defoliant (with and without) on 7 cvs were evaluated blackberry, containing three replicates and three plants in each cultivar. Was used as a defoliant lime sulfur applied in August pruning then held 25 days after application. Regarding fruit quality, Caigangue and Tupy varieties showed the highest SS/AT ratio, indicating the best flavor of their fruits for fresh consumption. The cultivars Brazos and Guarani showed lower SS/AT ratio, indicating more acidic fruits. Higher levels of ascorbic acid were found in fruits of cvs. Guarani and Cherokee. The application of defoliant reduced the total number of blackberry fruits of the cultivars Comanche and Guarani. The use of defoliant did not interfere in the physicochemical characteristics of the blackberry fruits of the evaluated cultivars.

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Vegetative development and flowering of Encyclia hybrid based on fertilization and substrate

Ornamental Horticulture ◽

10.1590/2447-536x.v27i3.2233 ◽

2021 ◽

Vol 27 (3) ◽

pp. 391-397

Author(s):

Fernanda Jaqueline Menegusso ◽

Fabíola Villa ◽

Tatiane Eberling ◽

Luciana Sabini da Silva ◽

Giovana Ritter ◽

...

Keyword(s):

Experimental Design ◽

High Temperatures ◽

Organic Fertilizers ◽

Western Region ◽

Vegetative Development ◽

Potted Plants ◽

The Western Region ◽

Substrate Types

Abstract Due to the fact that the western region of Paraná is considered subtropical, with high temperatures in the summer, the hybrids of Encyclia are commercialized by the beauty of its flowers and durability. However, there are no studies involving potted plants, substrate types and fertilizers, as well as hybrids, for the genus Encyclia. Thus, the objective of this work was to evaluate the vegetative development and flowering of Encyclia based on fertilization and substrate. The experiment was conducted in a commercial orchard, from January to September/2017. The seedlings remained in a protected environment, with 50% shading. The experimental design was randomized blocks, in a 4 x 5 factorial scheme (substrates x fertilization intervals), with 4 replicates per treatment, and 4 pots per replicate. The lot chosen was sowed in vitro, with the hybrid Encyclia “Kropp” x E. atropurpurea. After five months of the last fertilization, the evaluations related to vegetative development and flowering were carried out. Substrates based on sphagnum presented better results in flowering. Organic fertilizations with Bokashi at 45 days after transplant (DAT) favor flowering and vegetative development of the Encyclia hybrid, which occurs in pots containing sphagnum-based substrates and with organic fertilizers above 60 DAT.

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Initial Crown Diameter Influences on the Fruit Yield and Quality of Strawberry Pircinque

Agronomy ◽

10.3390/agronomy11010184 ◽

2021 ◽

Vol 11 (1) ◽

pp. 184

Author(s):

Antonio Felippe Fagherazzi ◽

Daniel Suek Zanin ◽

Marllon Fernando Soares dos Santos ◽

Juliana Martins de Lima ◽

Paola Daiane Welter ◽

...

Keyword(s):

Experimental Design ◽

Fruit Quality ◽

Titratable Acidity ◽

Physicochemical Characteristics ◽

Soluble Solids ◽

Productive Performance ◽

Crown Diameter ◽

Short Day ◽

Yield And Quality

In strawberry production, the combination of a high productive performance and fruits with desirable physicochemical characteristics requires the use of plants with a good quality and high initial vigor. This study aimed to evaluate the effect of plants with different crown diameters on the productive performance and fruit quality of strawberry plants of the cultivar ‘Pircinque’ (Short Day). The study was conducted in two evaluation cycles (2016/2017 and 2017/2018). The experimental design was divided into randomized blocks, with four repetitions, and plots consisting of 20 plants. This study evaluated the crown diameters of plants of 5, 7, 9, 11, 13, 15, 17, and 19 mm. The productivity and number of fruit values increased significantly by 57% with larger caliber plants, which also provided precocity of productivity. The use of more vigorous plants also favored the production of fruits with higher soluble solids/titratable acidity ratios (+28%) and with epidermis coloration closer to intense red (−4.3%). For the cultivar ‘Pircinque’, plant crown diameters between 15 and 17 mm are the most favorable because they condition the best productive performances in combination with precocity and a good fruit quality.

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