Resposta fenológica e exigência térmica de uvas apirenas cultivadas no Submédio do São Francisco

Abstract

RESUMOEste trabalho propôs como objetivo, caracterizar a resposta fenológica, a exigência térmica e as características físicas e físico-químicas no ponto de colheita das uvas apirenas 'BRS Morena', 'BRS Clara' e 'BRS Linda', nas condições do Vale do Submédio do São Francisco; para isto, foram caracterizados, então, os períodos fenológicos, desde a poda até o início das fases de brotação, floração, frutificação, maturação e colheita além dos requerimentos térmicos para cada fase, expressos em graus-dia. No ponto de colheita, foram determinados a massa dos cachos (gramas), o diâmetro das bagas (mm), a firmeza da polpa (N), o teor de sólidos solúveis (SS), a acidez titulável (AT) e o potencial Hidrogeniônico (pH). Em função dos resultados obtidos durante o período estudado os ciclos das videiras, entre a poda e a colheita, foram de 95 dias e 1.449 GD, para 'BRS Morena'; 97 dias e 1.497 GD, para 'BRS Clara' e 103 dias e 1.592 GD, para 'BRS Linda'. De maneira geral, as uvas dos cultivares 'BRS Morena' e 'BRS Clara' apresentaram características físicas e físico-químicas com potencial de comercialização para os mercados nacional e internacional, desde que práticas de manejo sejam utilizadas no sentido de melhorar algumas características físicas desses cultivares. Palavras-chave: fenologia, graus-dia, sem sementes, Vitis Phenological behaviour and thermal requirements of seedless grapes grown in the Submiddle São Francisco River ABSTRACTThis study aims to characterize the phenological behaviour, thermal requirements and the physical and physicochemical features at harvest of seedless grapes varieties 'BRS Morena', 'BRS Clara' and 'BRS Linda' under the conditions of the Submiddle São Francisco Valley. For this purpose, phenological periods were characterized, since pruning until early stage of budding, flowering, fruiting, ripening and harvesting, in addition to thermal requirements for each phase, expressed in degree-days (DG). At the harvest point, the bunch weight, the diameter of the berries, the pulp firmness, the soluble solids (SS), titratable acidity (TA) and the pH were determined. According to the results obtained during the study period, the cycles of the vines from pruning and harvesting were of 95 days and DG of 1,449, for 'BRS Morena'; DG of 1,497 and 97 days for 'BRS Clara', and 103 days and 1,592 DG for 'BRS Linda '. In general, the cultivars 'BRS Morena' and 'BRS Clara' had the physical and physicochemical potential for domestic and international markets, provided that management practices are used to improve some physical characteristics of these cultivars.

Phenology and Yield of the Hybrid Seedless Grape ‘BRS Melodia’ Grown in an Annual Double Cropping System in a Subtropical Area

“…Thus, knowledge of the duration of the main phenological stages and the thermal demands of the grapevine allows an understanding of the relationship between the duration of the plant development phases and seasonal variation. In addition, it also allows the rationalization and optimization of cultural practices, estimating the periods of labor demand and the probable dates of harvest and commercialization [7]. Thus, the objective of this work was to characterize the phenological and productive behavior of the new hybrid seedless grape 'BRS Melodia', grown in an annual double cropping system in the subtropical region of Brazil.…”

“…The diameter or caliber standards for the berries is also used for the export market of table grapes [7]. The berries of 'BRS Vitoria' and 'BRS Isis' seedless grapes, from the same breeding program, present diameters of 16.05 and 20.05 cm, respectively [3].…”

Agronomic performance of ‘BRS Melodia’ seedless table grape grafted onto different rootstocks

“…For most of the rootstocks, variations were not observed in berry diameter among the production cycles, except for IAC 572 and IAC 313. Berry diameter is an important variable, because berries with a minimum diameter of 17 mm are preferred in more demanding markets (Santos et al 2013). The rootstocks IAC 572 and IAC 313 led to development of berries with a diameter within the values recommended for commercialization of in the four production cycles evaluated (Ritschel et al 2021).…”

Biology of Diadiplosis multifila (Diptera: Cecidomyiidae) in Planococcus citri under constant temperatures

“…One of the characteristics of this region is the presence of two climatic seasons: wet and dry. In the latter, from August to October, the temperature can reach peaks equal to or greater than 31 °C(Santos et al, 2013).D. multifila do not complete their development cycle at 31 °C.…”