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Search Results: 1 - 10 of 5171 matches for " Maurilo Monteiro;Schuck "
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Efeitos de reguladores vegetais na propaga??o vegetativa do porta-enxerto de videira '43-43' (Vitis vinifera x V. rotundifolia)
Botelho, Renato Vasconcelos;Maia, Aline José;Pires, Erasmo José Paioli;Terra, Maurilo Monteiro;Schuck, Enio;
Revista Brasileira de Fruticultura , 2005, DOI: 10.1590/S0100-29452005000100004
Abstract: this work aimed to develop a methodology of vegetative propagation for the vine rootstock '43-43'. hardwood cuttings collected in august, softwood cuttings collected in january and semi-hardwood cuttings collected in march were immersed in solutions, by 10 minutes, containing different doses of the plant regulators paclobutrazol (0, 100 and 200 mg.l-1) and indole butyric acid (0, 500 and 1,000 mg.l-1), combined or not, totalizing nine treatments for each kind of cutting. sixty days after planting the cuttings, the following variables were evaluated: percentage of rooted cuttings, number of roots, fresh weight of roots and percentage of sprouted cuttings. the hardwood cuttings presented 100% of sprouted cuttings, but it was not verified rooting, independent of the utilization of plant regulators. the softwood cuttings that were not treated with plant regulators showed 92% of rooting and 84% of sprouting. for this king of cutting the iba at 1,000 mg.l-1 increased the number of roots. the semi-hardwood cuttings had the highest percentage of rooting (23.5%) when they were treated with iba at 1,000 mg.l-1. this treatment also propitiated the maximum fresh weight and number of roots, nevertheless, these values were inferior to those verified for softwood cuttings.
Estaquia do porta-enxerto de videira '43-43' (V. vinifera x V. rotundifolia) resistente à Eurhizococchus brasiliensis
Botelho, Renato Vasconcelos;Maia, Aline José;Pires, Erasmo José Paioli;Terra, Maurilo Monteiro;Schuck, Enio;
Revista Brasileira de Fruticultura , 2005, DOI: 10.1590/S0100-29452005000300033
Abstract: a trial was carried out aiming to evaluate the vegetative propagation by cutting for the vine rootstock '43-43'. softwood shoots collected in january - and semi-hardwood shoots collected in march - were divided in two lots: one of the cutting was taken from the apex and the other from the base. the cuttings were immersed in solutions, by 10 minutes, containing different doses of indole butyiric acid (0, 1000, 1500, 2000, 2500 or 3000 mgl-1), totalizing 12 treatments for each epoch of rooting. after that, the cuttings were planted in polypropylene vases with sand and kept under misty system irrigation. sixty days after planting the cuttings, for each epoch, the following variables were evaluated: percentage of rooted cuttings, length and fresh weight of roots and percentage of sprouted cuttings. the softwood and semi-hardwood cuttings presented high percentage of rooting (66% and 68%, respectively) even when not treated with the plant regulator. apical cuttings presented higher length and fresh weight of roots. the iba application reduced the percentage of rotting and sprouting of softwood and semi-hardwood cuttings. the semi-hardwood cuttings that were treated with iba at 1,000mgl-1 showed the highest length and the freshest weight of roots.
Desenvolvimento de gemas férteis em videiras cv. Itália no estado de S?o Paulo
Botelho, Renato Vasconcelos;Pires, Erasmo José Paioli;Terra, Maurilo Monteiro;
Bragantia , 2006, DOI: 10.1590/S0006-87052006000200011
Abstract: several investigations describe the time or the phenological stage of formation of the inflorescence primordial of the vine. the reports are however contradictory, possibly due to differences in climatic conditions among production regions. a trial was carried out aiming at to determine when fertile buds are developed in grapevine cv. italia, in two production regions of s?o paulo state, brazil: jales and jundiaí., five canes in each vineyard were sampled every 15 days after sprouting. up to the 15th node of each cane the buds were dissected and examined under stereomicroscope for presence of inflorescence primordia. percentage of fertile buds from the stage 5 (e5), percentage of fertile buds with full mature primordial on stage 7 (e7) and coefficient of fertility (relation between number of inflorescence primordia/number of total buds) were rearded. it was verified that the beginning of inflorescence primordia (e5) occurred at the 30 days after sprouting. the formation of inflorescence primordial fully mature (e7) took place between 45 and 75 days, corresponding to the phenological stages of flowering and "pea-grain", respectively. in jales vineyard, the percentage of fertile buds was higher, irrespective of the sample time, possibly because of its superior daily temperature averages.
Efeitos do CPPU e do ácido giberélico nas características dos cachos da uva de mesa 'Centennial Seedless'
Pires, Erasmo José Paioli;Botelho, Renato Vasconcelos;Terra, Maurilo Monteiro;
Ciência e Agrotecnologia , 2003, DOI: 10.1590/S1413-70542003000200008
Abstract: two trials were conducted in a commercial vineyard, in the region of jundiaí-sp, with the objective of studying the effects of cppu and ga3 on the clusters and berries characteristics of 'centennial seedless' table grape. in the first experiment, it was used cppu at 0; 5.0; 7.5; 10.0; 12.5; 15.0 and 17.5mg.l-1. in a second trial, ga3 was used at the doses of: 0, 5, 10, 15, 20, 25 e 30mg.l-1. both, cppu and ga3 increased the clusters weight and width; the berries weight, length and width; and the pedicel diameter. the increase in cluster length was significant only for ga3 applications. both growth regulators decreased the total soluble solids content. applications of cppu and ga3 at 5mg.l-1, provided increases in berries weight in 59.0 and 78.7%, respectively, and formation of untied clusters, with flexible pedicels. higher doses led to formation of clusters too much large, excessively compact, with pedicels very thick, and, therefore, with reduced commercial value.
Efeitos do cycocel na fertilidade de gemas e no crescimento dos ramos de videiras cv Itália (Vitis vinifera L.)
Botelho, Renato Vasconcelos;Pires, Erasmo José Paioli;Terra, Maurilo Monteiro;
Revista Brasileira de Fruticultura , 2004, DOI: 10.1590/S0100-29452004000100021
Abstract: the low bud fertility has been one of the most limiting factors in vineyards at s?o paulo state, and this problem has been correlated, in many cases, to the excess of plant vigor. in this context, a trial was carried out in a commercial vineyard of 'italia' table grape, located at s?o miguel arcanjo (sp), brazil. the experimental design was in complete randomized blocks with six treatments and four replications. the vine shoots were sprayed with cycocel at 0, 500, 1000, 1500, 2000 and 2500mg.l-1, 60 days after pruning. the variables evaluated were: percentage of fertile buds; distribution of fertile buds per shoot sector; percentage of bud necrosis; weight, length and diameter of internodes. applications of cycocel linearly increased the percentage of bud fertility and the proportion of fertile buds between first and fifth basal buds. furthermore, this growth regulator reduced the incidence of bud necrosis and the weight of internodes, presenting quadratic effect for these variables.
Efeitos de reguladores vegetais na qualidade de uvas 'Niagara Rosada' na regi?o Noroeste do Estado de S?o Paulo
Botelho, Renato Vasconcelos;Pires, Erasmo José Paioli;Terra, Maurilo Monteiro;
Revista Brasileira de Fruticultura , 2004, DOI: 10.1590/S0100-29452004000100020
Abstract: in the northwestern of s?o paulo state, 'niagara rosada' grapes are harvest off-season in traditional vine-growing areas, between june and november. however, because of soil and climate conditions, clusters and berries are small, what is unfavorable for trading. in this context, a trial was carried out in a vineyard located in junqueirópolis-sp, alta nova paulista region, with the objective of studying the effects of plant regulators on cluster and berry characteristics of 'niagara rosada' grapes. for treatments, it was used thidiazuron at 5 or 10 mg.l-1 and gibberellic acid at 35 mg.l-1, associated or not. it was realized 1, 2 or 3 weekly applications, beginning 14 days after full bloom, by dipping cluster in solution contained in a recipient. the following variables were evaluated: weight, length and width of clusters and berries; weight of rachis; number of berries; number of seeds; total soluble solids content; total titrable acidity, ph and tss/tta ratio of juice. between the different treatments tested, 2 applications of thidiazuron at 5mg.l-1, was the most promissory for commercial use, leading to increase cluster weight in 33,7%, and berry weight in 22,4%; without changing total soluble solids content, total titrable acidity, ph and tss/tta ratio of juice. plant regulators applications also improved rachis weight and berry width.
Brota??o e produtividade de videiras da cultivar Centennial Seedless (Vitis vinifera L.) tratadas com cianamida hidrogenada na regi?o noroeste do estado de S?o Paulo
Botelho, Renato Vasconcelos;Pires, Erasmo José Paioli;Terra, Maurilo Monteiro;
Revista Brasileira de Fruticultura , 2002, DOI: 10.1590/S0100-29452002000300007
Abstract: the northwest region of s?o paulo state presents winter with mild temperatures, that allows grape crops between june and october, outside of harvest time from traditional grape-growing areas. in these conditions vine sprouting is irregular and low, requiring budbreak with chemical compounds. in this context, a trial was conducted in a commercial centennial seedless (vitis vinifera l.) vineyard, where it was studied the effects of hydrogen cyanamide applied at different epochs. vinegrapes were pruned at three different times (03-23, 04-05 and 04-20-2002) and the following doses of hydrogen cyanamide were used: 0, 0.75, 1.50, 2.25, 3.00 and 3.75%. the following variables were evaluated: percentage of sprouting, percentage of growing shoots, number of clusters, cluster weight and total yield. independently of the hydrogen cyanamide dose, vines pruned earlier showed a lower percentage of sprouting. hydrogen cyanamide applications presented a quadratic effect for percentage of sprouting, and number of clusters. additionally, it was verified quadratic effects of hydrogen cyanamide applications for the variables percentage of growing shoots, cluster weight and total yield; in the prune carried out on april 20th . in the prune done on april 5th, it was observed linear increase for these variables. the estimated dose of hydrogen cyanamide for the highest sprouting was 2,89%.
Fertilidade de gemas em videiras: fisiologia e fatores envolvidos
Renato Vasconcelos Botelho,Erasmo José Paioli Pires,Maurilo Monteiro Terra
Ambiência , 2006,
Abstract: O presente trabalho teve como objetivo descrever a fisiologia da forma o das gemas férteis em videiras, assim como discutir os fatores envolvidos neste processo. A forma o das inflorescências em videiras se inicia no ciclo anterior à sua antese, durante o desenvolvimento das gemas latentes, sendo concluída na brota o destas gemas no ciclo seguinte. Didaticamente, este processo pode ser dividido em três principais etapas: 1) Forma o do primórdio indiferenciado; 2) Diferencia o em primórdio de inflorescência; e 3) Diferencia o e forma o das flores. Os primórdios indiferenciados, protuberancias do tecido meristemático formados no interior da gema, podem dar origem a inflorescências, gavinhas ou brota es, dependendo de diversos fatores, tais como: balan o hormonal, característica varietal, vigor dos ramos, temperatura, intensidade luminosa, disponibilidade de água, nutri o mineral e práticas culturais. Do ponto de vista agron mico, concluí-se que o manejo de um vinhedo n o deve visar estritamente a produ o do ciclo corrente, mas também a forma o das gemas para o ciclo seguinte, pois esta é a primeira condi o para a obten o de alta produtividade em videiras.
Brota o e produtividade de videiras da cultivar Centennial Seedless (Vitis vinifera L.) tratadas com cianamida hidrogenada na regi o noroeste do estado de S o Paulo
Botelho Renato Vasconcelos,Pires Erasmo José Paioli,Terra Maurilo Monteiro
Revista Brasileira de Fruticultura , 2002,
Abstract: A regi o Noroeste do Estado de S o Paulo apresenta inverno com temperaturas amenas que permite a produ o de uvas entre junho e outubro, fora do período de colheita das regi es vitícolas tradicionais. Nestas condi es, a brota o da videira é deficiente e desuniforme, o que exige a quebra de dormência com compostos químicos. Neste contexto, um experimento foi conduzido em vinhedo comercial da cultivar Centennial Seedless (Vitis vinifera L.) em que foi estudado o efeito da cianamida hidrogenada em diferentes épocas de aplica o. As videiras foram podadas em 3 datas diferentes (23-03, 05-04 e 20-04-2002), e as seguintes doses de cianamida hidrogenada (H2CN2) foram utilizadas: 0; 0,75; 1,5; 2,25; 3,0 e 3,75%. As variáveis avaliadas foram as seguintes: porcentagem de brota o, porcentagem de ramos após desbrota, número de cachos, massa dos cachos e produ o total. Independentemente da dose de cianamida hidrogenada, as videiras podadas mais cedo apresentaram menor porcentagem de brota o. Aplica es de cinamida hidrogenada apresentaram efeito quadrático sobre a porcentagem de brota o e o número de cachos. Além disso, verificou-se efeito quadrádico das aplica es de cianamida hidrogenada para porcentagem de ramos desenvolvidos, massa dos cachos e produ o total, na poda realizada em 20 de abril. Para a poda realizada em 05 de abril, observou-se aumento linear para estas variáveis. A dose de cianamida hidrogenada estimada para a maior porcentagem de brota o foi de 2,89%.
Efeitos do paclobutrazol na fertilidade de gemas e no crescimento dos ramos de videiras cv Rubi
Botelho, Renato Vasconcelos;Pires, Erasmo José Paioli;Terra, Maurilo Monteiro;Mercer, Renato Monteiro;Kerniski, Sérgio;
Revista Brasileira de Fruticultura , 2004, DOI: 10.1590/S0100-29452004000200039
Abstract: the low bud fertility has been one of the most limiting factors in vineyards at s?o paulo state, and this problem has been correlated, in many cases, to the excess of plant vigor. in this context, a trial was carried out in a commercial vineyard of 'rubi' table grape, located at palmeira d'oeste (sp), brazil. the experimental design was in complete randomized blocks with six treatments and four replications. the vine shoots were sprayed with paclobutrazol at 0; 500; 1,000; 1,500; 2,000 and 2,500 mgl-1, at the fifth leaf phenological stage. the variables evaluated were: percentage of fertile buds; percentage of bud necrosis; fresh weight and length of shoots and diameter of internodes. applications of paclobutrazol reduced the weight and the length of shoots and the internodes diameter. the percentage of fertile buds was also reduced, probably due to the decreasing in endogenous gibberellin levels necessary for uncommitted primordia formation.
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