Bento Gonçalves, Brazil
Bento Gonçalves, Brazil

Time filter

Source Type

Bernardi D.,University of Sao Paulo | Botton M.,Embrapa Grape and Wine | da Cunha U.S.,Eliseu Maciel Agronomy School | Bernardi O.,University of Sao Paulo | And 3 more authors.
Pest Management Science | Year: 2013

BACKGROUND: The spider mite, Tetranychus urticae, is the major strawberry pest in Brazil. The main strategies for its control comprise synthetic acaricides and predatory mites. The recent register of a commercial formula of azadirachtin (Azamax® 12 g L-1) can be viable for control of T. urticae. In this work, the effects of azadirachtin on T. urticae and its compatibility with predatory mites Neoseiulus californicus and Phytoseiulus macropilis in the strawberry crop were evaluated. RESULTS: Azadirachtin was efficient against T. urticae, with a mortality rate similar to that of abamectin. In addition, the azadirachtin showed lower biological persistence (7 days) than abamectin (21 days). Azadirachtin did not cause significant mortality of adult predatory mites (N. californicus and P. macropilis), but it did reduce fecundity by 50%. However, egg viability of the azadirachtin treatments was similar to that of the control (>80% viability). The use of azadirachtin and predatory mites is a valuable tool for controlling T. urticae in strawberry crop. CONCLUSIONS: Azadirachtin provided effective control of T. urticae and is compatible with the predatory mites N. californicus and P. macropilis. It is an excellent tool to be incorporated into integrated pest management for strawberry crop in Brazil. © 2012 Society of Chemical Industry.


Pacheco da Silva V.C.,Federal University of Pelotas | Galzer E.C.W.,Embrapa Grape and Wine | Malausa T.,CNRS Sophia Agrobiotech Institute | Germain J.F.,Laboratory Of La Sante Des Vegetaux | And 2 more authors.
Neotropical Entomology | Year: 2016

In the last decade, the incidence of mealybugs (Hemiptera: Pseudococcidae) in vineyards has increased, especially on crops grown under plastic covering, in the Serra Gaúcha region of southern Brazil where the major Brazilian wineries are concentrated. Eggs, nymphs, and female adults were collected in two highly infested vineyards in Bento Gonçalves City, Rio Grande do Sul, Brazil. Mealybugs were identified by morphological and molecular techniques as the vine mealybug Planococcus ficus (Signoret). This is a principal mealybug pest of vineyards worldwide, and this is the first record of damage from this species in Brazil. © 2016, Sociedade Entomológica do Brasil.


Pacheco da Silva V.C.,Campus Universitario Capao do Leao s n | Kaydan M.B.,Cukurova University | Germain J.-F.,Laboratoire Of La Sante Des Vegetaux | Malausa T.,CNRS Sophia Agrobiotech Institute | Botton M.,Embrapa Grape and Wine
ZooKeys | Year: 2016

Brazil has the greatest insect diversity in the world; however, little is known about its scale insect species (Hemiptera: Coccomorpha). Mealybugs (Pseudococcidae) have been found in at least 50% of persimmon orchards Diospyros kaki L. in the southern part of the country. In this study three new mealybug species on persimmon trees located in the Serra Gaúcha Region, RS, Brazil, namely, Anisococcus granarae Pacheco da Silva & Kaydan, sp. n., Ferrisia kaki Kaydan & Pacheco da Silva, sp. n. and Pseudococcus rosangelae Pacheco da Silva & Kaydan, sp. n. are described. In addition, an identification key for the genera occurring on fruit orchards and vineyards in Brazil is provided, together with illustrations and molecular data for the new species. © Vitor C. Pacheco da Silva et al.


PubMed | Embrapa Grape and Wine, Laboratory Of La Sante Des Vegetaux, Federal University of Pelotas, CNRS Sophia Agrobiotech Institute and Cukurova University
Type: Journal Article | Journal: Neotropical entomology | Year: 2016

In the last decade, the incidence of mealybugs (Hemiptera: Pseudococcidae) in vineyards has increased, especially on crops grown under plastic covering, in the Serra Gacha region of southern Brazil where the major Brazilian wineries are concentrated. Eggs, nymphs, and female adults were collected in two highly infested vineyards in Bento Gonalves City, Rio Grande do Sul, Brazil. Mealybugs were identified by morphological and molecular techniques as the vine mealybug Planococcus ficus (Signoret). This is a principal mealybug pest of vineyards worldwide, and this is the first record of damage from this species in Brazil.


Alves S.A.M.,Embrapa Grape and Wine | Beresford R.M.,The New Zealand Institute for Plant and Food Research Ltd
New Zealand Plant Protection | Year: 2013

Ascospores of Venturia inaequalis constitute the principal source of primary inoculum for epidemics of apple black spot (scab). Mathematical models that describe ascospore release have been developed in USA, New Zealand and Italy. These models are based upon degree-day accumulation. In this work, the seasonal pattern of released ascospores of V. inaequalis in Vacaria, Brazil, was evaluated. During four apple growth seasons (2009 to 2012) the natural release of ascospores from ive orchards was recorded. The cumulative percentage of ascospore release was predicted using three different degreeday models. The released ascospore data showed the best it to the model developed in Italy, with a start date of 22 August rather than the phenological stage of apple bud break. It is concluded that in regions with warm winter temperatures, models that use bud break to initiate ascospore maturation will tend to underestimate availability of ascospores. © 2013 New Zealand Plant Protection Society.


Wistrom C.M.,University of California at Berkeley | Blaisdell G.K.,University of California at Berkeley | Wunderlich L.R.,University of California Cooperative Extension | Botton M.,Embrapa Grape and Wine | And 2 more authors.
European Journal of Plant Pathology | Year: 2016

Grapevine leafroll disease is associated with several species of phloem-limited grapevine leafroll-associated viruses (GLRaV), some of which are transmitted by mealybugs and scale insects. The grape phylloxera, Daktulosphaira vitifoliae (Fitch) Biotype A (Hemiptera: Phylloxeridae), is a common vineyard pest that feeds on the phloem of vine roots. There is concern that these insects may transmit one or more GLRaV species, particularly GLRaV-2, a species in the genus Closterovirus. A field survey was performed in vineyards with a high incidence of grapevine leafroll disease and D. vitifoliae was assessed for acquisition of GLRaV. In greenhouse experiments, the ability of D. vitifoliae to transmit GLRaV from infected root sections or vines to co-planted virus-free recipient vines was tested. There were no GLRaV-positive D. vitifoliae in the field survey, nor did D. vitifoliae transmit GLRaV-1, −2, −3, or -4LV in greenhouse transmission experiments. Some insects tested positive for GLRaV after feeding on infected source vines in the greenhouse, however there was no evidence of virus transmission to healthy plants. These findings, in combination with the sedentary behaviour of the soil biotype of D. vitifoliae, make it unlikely that D. vitifoliae is a vector of any GLRaV. © 2016 Koninklijke Nederlandse Planteziektenkundige Vereniging


De Meyer G.A.,Santa Catarina State University | Rufato L.,Santa Catarina State University | Sanhueza R.M.V.,Proterra | De Rufato A.R.,Embrapa Grape and Wine
Acta Horticulturae | Year: 2016

In Brazil, leaf abscission in apple trees can occur prematurely due to infection by Glomerella leaf spot (Colletotrichum gloeosporioides). The extent of leaf fall is correlated with ethylene production resulting from the reaction by the host to prevent the dissemination of the pathogen. The aim of this study was to verify the impact of the aminoethoxyivinylglycine (AVG) on the process of leaf abscission in plants exhibiting Glomerella leaf spot symptoms. The experiment was conducted in the spring of 2011 in 'Maxi Gala'/M9 young apple trees (2 years old) in pots under greenhouse conditions at 22±2°C, with 80±5% relative humidity, (28°30'52"S and 50°52'58"W, 950 m). Plants without disease symptoms were artificially inoculated with C. gloeosporioides, and treatments were applied when the leaves had symptoms of infection. The experiment included 7 treatments with AVG and/or the fungicide Folpet (mg L-1 active ingredient - a.i.) as follows: AVG 60, AVG 150, AVG 30 + Folpet 120, AVG 45 + Folpet 120, AVG 60 + Folpet 120, AVG 150 + Folpet 120, Folpet 120 alone and the untreated control. Assessments of percentage defoliation were made weekly until 68 days after spraying (das). The results indicated that AVG in doses 60 and 150 mg L-1 resulted in a reduced level of defoliation, compared with the fungicide treated trees, and abscission was equivalent to control at 21 das. After the disease is established and is not controlled by fungicide there was an increase in leaf abscission compared to the control.


De Sa Borges R.,Embrapa Products and Market | da Silva G.A.,Embrapa Grape and Wine | Roberto S.R.,State University Londrina | de Assis A.M.,State University Londrina | Yamamoto L.Y.,State University Londrina
Scientia Horticulturae | Year: 2013

The aim of this study was to evaluate the total phenols, anthocyanins, tannins, favorable oxi-redox activity (oxi-redoxf) and juice color of six clones of the 'Concord' grapevine on three rootstocks. Samples of juice obtained from 'Concord' clones '22', '28', '49', '202', '211' and '225' grafted onto 'IAC 766', 'IAC 572' and '420-A' were evaluated. The trial was conducted at the Technology Center of COROL Cooperative, Rolândia, PR, Brazil. A completely randomized design was used as the statistical model, arranged in a factorial system (6 clones×3 rootstocks) with three replications. The grapevines were trained in an overhead trellis system spaced at 4.0m×2.0m, and the evaluations were performed at the 2010/2011 harvest. The juice samples were prepared using the Welch process. The juice from 'Concord' clone '202' presented higher means regarding to total phenols and tannins, color intensity and yellow and red color at 420 and 520nm. The juices did not differ significantly among themselves (P>0.05) with regard to the oxi-redoxf activity, anthocyanins and violet color at 620nm, however, the use of rootstock '420-A' resulted in higher means for total phenols, tannins and oxi-redoxf activity, whereas 'IAC 572' resulted in a reduction in the color intensity of the juice. © 2013 Elsevier B.V.


Oliveira L.S.,Federal University of Ceará | Rufino M.S.M.,Embrapa Tropical Agroindustry | Moura C.F.H.,Embrapa Tropical Agroindustry | Cavalcanti F.R.,Embrapa Grape and Wine | And 2 more authors.
Brazilian Journal of Plant Physiology | Year: 2011

This study evaluated the effect of the processing and long-term storage on the antioxidant potential and activity of antioxidant enzymes of frozen purées from six acerola clones. Ripe acerolas from clones BRS 235, BRS 236, BRS 237, BRS 238, II47/1 and BRS 152 were harvested; the pulp was processed, packed in sealed polyethylene plastic bags and stored in a domestic freezer at -18°C for 11 months. Samples of each clone were analyzed on harvest/processing day and every 30 days after for bioactive antioxidant compounds, antioxidant enzyme activity and total antioxidant activity. Acerola purées presented a decrease of non-enzyme antioxidants and an increase of antioxidant enzymes activities, indicatives of a compensatory mechanism between enzymatic and non-enzymatic antioxidants. In acerola purée, anthocyanin and polyphenols are strongly correlated to soluble solids content and vitamin C seems a major contributor to total antioxidant activity. Clone II47/1 had an outstanding performance regarding the antioxidant potential of its purée and the best storage period at -18oC would be 150 days, for all clones studied.


Roberto S.R.,State University Londrina | Borges W.F.S.,State University Londrina | Colombo R.C.,State University Londrina | Koyama R.,State University Londrina | And 2 more authors.
Scientia Horticulturae | Year: 2015

The objective of this study was to evaluate techniques, such as flower-cluster and berry-cluster thinning at different times, to prevent bunch compactness of 'BRS Vitoria', a new black seedless grape. The experiment was conducted during two consecutive seasons (2013 and 2014) in a commercial vineyard located in Marialva, PR, Brazil. The grapevines were trained in an overhead trellis system, spaced at 2.5. × 5.0 m. The experimental design used was randomized blocks with four replications and six treatments: control (no thinning); flower-cluster thinning or brushing prior to anthesis; and berry-cluster thinning at different times, when berries were 3-6, 7-10, 11-15, or 16-18 mm in diameter. The bunch compactness incidence was evaluated according to the following classification: very loose, medium loose, and very dense bunches. The physicochemical characteristics of bunches and the yield were also evaluated. Data were submitted to analysis of variance, and means were compared using Tukey's test at 5%. Berry-cluster thinning when 'BRS Vitoria' berries are between 7 and 18 mm in diameter is efficient for reducing bunch compactness, as it results in a higher incidence of medium loose and a lower incidence of very dense bunches with optimum yield, while flower-cluster thinning or brushing prior to anthesis should be avoided because it promotes higher incidence of very loose bunches with reduced yield. © 2015 Elsevier B.V.

Loading Embrapa Grape and Wine collaborators
Loading Embrapa Grape and Wine collaborators