Epagri Estacao Experimental de Cacador

Caçador, Brazil

Epagri Estacao Experimental de Cacador

Caçador, Brazil

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dos Santos J.P.,EPAGRI Estacao Experimental de Cacador | Hickel E.R.,EPAGRI | Argenta L.C.,EPAGRI
Revista Brasileira de Fruticultura | Year: 2015

This study aimed to evaluate the influence of bagging on apple fruit quality on different development stages. The study was conducted in an organic orchard at the Experimental Station of Epagri in Caçador, SC, during the 2009/2010 and 2010/2011 crop seasons. The apple tree genotypes evaluated were ‘Royal Gala’, ‘Fuji Suprema’, ‘Catarina’ and the M-11/00 selection. The fruits were evaluated at the following stages: intermediate development (half-cycle), at harvest or commercial maturity and seven days after harvest. Fruits were submitted to two different conditions (treatments): bagged and no bagged. Fruits were bagged after thinning, at approximately 20 mm diameter, with white non-textured fabric packaging. The physico-chemical attributes evaluated were: background color, diameter, fresh weight, pulp firmness, starch-iodine index, titratable acidity and total soluble solids. Fruit bagging did not affect fruit background color or total soluble solids. However, fruit diameter, fresh weight, pulp firmness, starch-iodine index and tritratable acidity were altered depending on the apple tree genotype and developmental stage. Bagging can provide larger and heavier fruits, it may also anticipate maturity due to reduction on pulp firmness and increase of the starch-iodine index. In some genotypes and developmental stages the average tritratable acidity values were lower in bagged fruits. © 2015, Sociedade Brasileira de Fruticultura. All rights reserved.


Hawerroth F.J.,Embrapa Agroindustria Tropical | Petri J.L.,Epagri Estacao Experimental de Cacador
Revista Brasileira de Fruticultura | Year: 2014

The use of plant growth regulators that act on the biosynthesis of gibberellins, as proexadione calcium, may enable proper balance between vegetative growth and fruiting to maximize production indexes. However, the response of this plant growth regulator depends on the pattern of shoot growth. Thus, the aim of this study was to evaluate the effect of application times of prohexadione calcium on vegetative growth control of apple ‘Fuji Suprema’, in the climatic conditions of Southern Brazil. It was evaluated different application times of prohexadione calcium at 330 g ha-1, in two growing seasons, using randomized complete block design with ten replication of a plant. In the 2008/2009 growing season were evaluated six times of application (28, 58, 88, 118, 148, and 178 DAFB, days after full bloom), and in the 2009/2010 season were evaluated seven times (20, 50, 80, 110, 140, 170, and 200 DAFB), both compared with check treatment (no application). The prohexadione calcium sprayed in a single application at 330 g ha-1 until 28 days after full bloom may reduce the number, weight and average length of pruned shoots in ‘Fuji Suprema’ apple trees, but in conditions of excessive vegetative growth have not effect. The use prohexadione calcium at 330 g ha-1 in a single application, regardless of timing application has not effect on fruit production of ‘Fuji Suprema’ apples. © 2014, Sociedade Brasileira de Fruticultura. All rights reserved.


Hawerroth F.J.,Embrapa Agroindustria Tropical | Petri J.L.,Epagri Estacao Experimental de Cacador | Leite G.B.,Epagri Estacao Experimental de Cacador | Yoshikawa E.R.,Tokyo University of Agriculture and Technology
Revista Brasileira de Fruticultura | Year: 2012

The control of vegetative growth is crucial in apple orchards in order to increase production efficiency and fruit quality. The shoot development may be reduced by inhibitors of gibberellins synthesis, as prohexadione calcium, and the response of this plant growth regulator depends on the seasonal pattern of shoot growth. The objective of this study was to evaluate the effect of different application timing of prohexadione calcium on vegetative growth control of 'Imperial Gala' apple trees, in the climatic conditions of Southern Brazil. In 2008/2009 growing season, the following application timings of prohexadione calcium at 330 g ha-1 were evaluated: 28, 58, 88, 118, 148 and 178 days after full bloom-DAFB, and in 2009/2010 growing season, the application timings were: 20, 50, 80, 110, 140, 170 and 200 DAFB, and a control treatment. Applications of prohexadione calcium (330 g ha-1) performed at 20 to 28 days after full bloom reduced the average length and average fresh weight of shoots pruned in 'Imperial Gala' apple trees.


de Albuquerque Jr. C.L.,University of South Santa Catarina | Denardi F.,Epagri Estacao Experimental de Cacador | Dantas A.C.M.,State University of Rio Grande do Sul | Nodari R.O.,Federal University of Santa Catarina
Revista Brasileira de Fruticultura | Year: 2010

The objective of this study was to evaluate the number of anthers per flower, the number of pollen grains per anther and the pollen germination capacity of different cultivars of apple trees. The study was performed at the Physiology and Plant Genetics Laboratory of Federal University of Santa Catarina. The field collecting was performed at Epagri / Caçador Experimental Station, in the State of Santa Catarina during October, 2005. It was used the following apple cultivars developed in Brazil: Primícia, Princesa, Fred Hough, Catarina, Baronesa, Lisgala, Suprema, Condessa, Daiane, Duquesa, Imperatriz and Joaquina. It was concluded that the apple cultivars Condessa, Princesa, Eva, Duquesa, Imperatriz, Gala, Fred Hough, Daiane, Baronesa and Suprema produce pollen grains of satisfactory quantity and of good germination capacity. The cv. Condessa, although having high pollen germination capacity, produces fewer anthers and less pollen grain per anther than the others. Princesa is the cultivar of best pattern as pollinizer, once it combines number of anthers/flower, number of pollen grains/anther and pollen germination capacity in a better satisfactory level.


Dos Santos J.P.,EPAGRI Estacao Experimental de Cacador | Redaelli L.R.,Federal University of Rio Grande do Sul | Sant'Ana J.,Federal University of Rio Grande do Sul | Hickel E.R.,EPAGRI Estacao Experimental de Itajai
Revista Brasileira de Fruticultura | Year: 2015

The study aimed to record damages of Anastrepha fraterculus (Diptera: Tephritidae), on two developmental stages of apple fruits genotypes M-11/00 and ‘Catarina’, submitted to three different infestation conditions in the field, during the 2011/2012 crop season. The experiment was carried out in an organic apple orchard management at Epagri Experimental Station in Caçador, SC, Brazil. The average number of fruit flies was weekly recorded with four McPhail traps. Unripe and ripe fruits of the selection M-11/00 and of the Catarina cultivar, were submitted to artificial, controlled and natural infestation conditions. In the beginning of fruiting, after the thinning, in each genotype, 500 fruits were randomly bagged with nontextured fabric (TNT) packing. Fruits submitted to the artificial infestation were involved, individually, in a cage containing two mated females of A. fraterculus that stay for three days for oviposition. In the controlled infestation, in the same day of placing the cages, protected fruits were unbagged to be exposed for three days. No bagged fruits were used to evaluate the natural infestation. In each developmental stage the values of physico-chemical attributes of fruits were recorded. During the crop season, the average number of A. fraterculus was 3.08 fruit flies/trap/week. The average number of larvae and pupae was greater in M-11/00 ripe fruits, in all of the infestation conditions. These numbers, in the Catarina cv., did not differ neither among infestation conditions, nor in developmental stages. Pupae of A. fraterculus were not observed in ‘Catarina’ fruits, in these cultivar was recorded a highest acidity and lowest relationship of soluble solids/acidity. © 2015, Sociedade Brasileira de Fruticultura. All rights reserved.


Dalbo M.A.,Epagri Estacao Experimental de Videira | Bettoni J.C.,UDESC CAV | Gardin J.P.P.,Epagri Estacao Experimental de Videira | Basso C.,Epagri Estacao Experimental de Cacador
Revista Brasileira de Fruticultura | Year: 2015

Grapevine ‘Isabel’ grafted on rootstock ‘SO4’ and ‘IAC 766’ and planted on ungrafted Nitosol were treated annually with increasing concentrations of K2O, 0; 60; 120 and 180 kg ha-1 for 5 wine-growing seasons (2007/08 , 2008/09 , 2009/10 , 2010/11 and 2011/12). The experimental design was banded with five replications, with six plants per replication and the treatments in a 4×3 factorial design, with 12 treatments, corresponding to four doses of potassium fertilization and the three rootstocks. The stage of berries peel color change, stems were collected to determine the nutrient content in the grape leaves. At the time of harvest it was evaluated vegetative and productive behavior, such as productivity, weight pruning, Ravaz index, and analytical characteristics of berries, total soluble solids, titratable acidity and pH were evaluated. Increased potassium fertilization does not represent a gain in productivity in cv. Isabel nor the accumulation of soluble solids in grapes. K and Mg in petioles of grapes are influenced by the form of cultivation ( grafted or ungrafted ).’Isabel’ vines grown on ungrafted have less capacity to accumulation of K and higher of Mg in the petioles. Under the conditions of the soil that was developed the research is not justified potassium fertilization of the vineyard. © 2015, Sociedade Brasileira de Fruticultura. All rights reserved.


Hawerroth F.J.,Federal University of Pelotas | Petri J.L.,EPAGRI Estacao Experimental de Cacador | Leite G.B.,EPAGRI Estacao Experimental de Cacador
Acta Horticulturae | Year: 2010

In mild winter climates, the budbreak promoters application is one of main management strategies used to decrease problems of insufficient winter chilling on temperate fruit trees. Despite of the high efficiency of some chemicals on budbreak induction, the high toxicity showed by these compounds is one problem related to its use. Erger, an organic nitrogen compound, combined with calcium nitrate, has a similar effect to that of hydrogen cyanamid, with the advantage of being less dangerous to the environment. The objective of this study was to evaluate the effects of Erger and calcium nitrate combinations on budbreak induction of 'Imperial Gala' and 'Suprema's Fuji' apples. The experiments were carried out in Caçador, Santa Catarina, Brazil (26°46'S, 51°W), at 960 m a.s.l., during two growing seasons (2006/2007 and 2007/2008). The treatments tested were control, standard (mineral oil 3% + Dormex® 0.7%), and Erger + calcium nitrate at concentrations of 3, 5, and 7%. Full bloom date, axillary and terminal budbreak, fruit set, and mean fruit weight were evaluated. All Erger + calcium nitrate concentrations anticipated the full bloom date in relation to control treatment, but were not observed differences with mineral oil 3% and Dormex® 0.7%. The budbreak promoters increased significantly axillary and terminal budbreak and increasing the uniformity of budbreak. Fruit set was not affected by Erger + calcium nitrate concentration in relation standard treatment. The combinations of Erger and calcium nitrate showed similar uniformity and performance to mineral oil and hydrogen cyanamide on budbreak, showing to be an efficient alternative to budbreak induction in 'Imperial Gala' and 'Suprema's Fuji' apples.


Leite G.B.,EPAGRI Estacao Experimental de Cacador | Petri J.L.,EPAGRI Estacao Experimental de Cacador | Couto M.,EPAGRI Estacao Experimental de Cacador | Hawerroth F.J.,Federal University of Pelotas
Acta Horticulturae | Year: 2010

Increasing the fruit set improves yield of apple cultivars that have a high rate of flowers drop when grown under adverse climatic conditions. Apple cultivars such as 'Condessa' have low chilling requirement and intense blooming. However, depending on the prevalent climatic conditions and year, the fruit set is too low to result in an economically viable yield. Under these conditions, the fruit set may be improved by applying growth regulators that interfere on plants metabolism and physiology. The effects of concentrations of Prohexadione calcium (PCa) or a mixture of PCa with Thidiazuron (TDZ) were studied in a field trial with 'Condessa' apple in a mild climate region in Santa Catarina State, Brazil. PCa or PCa+TDZ were applied at the phenological stages E2, F2, G, and H. PCa was applied at the concentrations of 0, 55, 110, 165, and 330 mg L -1, with and without adding 12 mg L -1 of TDZ. Independently of its concentration, PCa had little effect when applied single, while PCa+TDZ significantly increased fruit set and the number of fruit per tree. The phenological stage of application ware important than concentration of PCa. Compared to the control, PCa+TDZ applied at the stages G and H increased the number of fruit per tree by 267 and 391%, respectively.


Petri J.L.,EPAGRI Estacao Experimental de Cacador | Leite G.B.,EPAGRI Estacao Experimental de Cacador | Couto M.,EPAGRI Estacao Experimental de Cacador | Hawerroth F.J.,Federal University of Pelotas
Acta Horticulturae | Year: 2010

Blooming is one of the most important events during the growing season of an apple tree because it determines the next harvest. At this time, environmental and physiological factors interact to define the next steps of the fructification. Under mild winter climates, such as those experienced in the Southern Brazilian apple growing area, it is common for blooming and vegetative growth to start together. In this situation, the vegetative growth strongly competes with the flowers for carbohydrates, negatively affecting the fruit set. Growth regulators that act as cytokinins, auxins or gibberellins may increase the fruit set. The effects of prohexadione calcium (PCa) at the rates of 0, 55, 110 and 220 mg L -1, sprayed alone or combined with thidiazuron (TDZ) 10 mg L -1 or with Promalin 0.5 L ha-1, were compared for their effects on the fructification and on the fruit characteristics of 'Royal Gala' apples. The treatments were applied between the pink bud and the full bloom stage. Applications of PCa at 55 mg L -1 plus TDZ at 10 mg L -1 increased the fruit set and the number of fruits per cluster, but did not differ from the treatment with only TDZ 10 mg L -1. When applied singly, the PCa treatments gave variable results, with a tendency to be better than the control. PCa plus Promalin reduced the fruit set. PCa 55 mg L -1 + TDZ 10 mg L -1 increased 132% the number of fruit per tree in comparison with untreated trees. The growth regulators PCa and TDZ were effective in increasing yield when there was lack of pollination.


Hawerroth F.J.,Federal University of Pelotas | Petri J.L.,Epagri Estacao Experimental de Cacador | Leite G.B.,Epagri Estacao Experimental de Cacador | Herter F.G.,Federal University of Pelotas
Revista Brasileira de Fruticultura | Year: 2010

Despite the high efficiency of some chemicals on budbreak induction of temperate fruit trees, the high toxicity showed by these compounds is one of the main problems related to its use. Preliminary results indicated that Erger®, an organic nitrogen compound, combined with calcium nitrate, has similar effect to hydrogen cyanamide, with the advantage of being less dangerous to the environment. Thus, the present study aimed to evaluate the efficiency of Erger® and calcium nitrate as budbreak promoter in apple trees. The experiment was carried out in Caçador/SC, in 2007, where was done the application of different budbreak promoters in 'Imperial Gala' and 'Fuji Suprema' apples. The budbreak promoters tested were Erger® 3% + calcium nitrate 3%, Erger® 5% + calcium nitrate 5%, Erger® 7% + calcium nitrate 7%, mineral oil 3.2% + 0.34% hydrogen cyanamide and control (without application). It was evaluated occurrence dates of early, full and end blooming stages, budbreak of axillary and terminal buds, axillary budbreak uniformity and fruit set. The budbreak promoters increased significantly axillary and terminal budbreak, and it increased the budbreak uniformity and the blooming overlap of 'Imperial Gala' and 'Fuji Suprema' apples. Because of negative effects on fruit set of 'Imperial Gala' apples, it is indicated Erger® and calcium nitrate application at concentrations below 7%.

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